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PULSA PV
joule pulsa pv solar high performance ac solar module installation guide
Please complete this warranty card and return
it to Joule to activate the warranty.
Installer Name
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Contact Tel. no.
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Contact Email..........................................
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Date purchased
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Inverter Serial No’s. ..............................
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Table of Contents
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Why Install Photovoltaic Solar Panels?
Contribution to Running Costs
Advantages
Features
Maximising Performance
Transportation and Installation Notes
Safety Instructions
General Safety
Handling Safety
Installation Safety
Fire Safety
Technical Specification
Mechanical Installation
Select suitable locations for installation
Components supplied
Installation
Locating the Inverter
Installing Branch Connectors
Electrical Installation
Lightning Surge Protection
Selecting Engage Cable Type
Installation Procedure
Step 1 - Measure AC at the Electricity Network connection
Step 2 - Install the AC Branch Circuit Junction Box
Step 3 - Position the Enphase Engage Cable
Step 4 - Attach the Microinverters to the Mounting Rail
Step 5 - Dress the Engage Cable
Step 6 - Terminate the Unused End of the Engage Cable
Step 7 - Connect the Engage Cable to AC Junction Box(es)
Electrical Installation - Microinverter
Technical Specification
Electrical Installation
Engage and Wire Sizing Overview
What Contributes to Voltage Rise
Sample Calculation
Voltage Rise for M215s with the 230V Engage Cable
Step 8 - Verification and Commissioning
Maintenance
Replacing a Microinverter
Locating the Unit
Why Install Photovoltaic Solar Panels?
Since the revisions to Part L of the Building Regulations in March 2014 there has been
a need for a greater contribution from renewable sources of energy for domestic and
commercial constructions. One way to comply with the updated regulations is by installing Photovoltaic (PV) Solar Panels.
There are numerous benefits to installing PV Solar Panels
• PV panels provide clean, green energy. During electricity generation with PV panels there is no harmful greenhouse gas emissions thus solar PV is environmentally
friendly.
• Solar energy is energy supplied by nature – it is thus free and abundant!
• Solar energy can be made available almost anywhere there is sunlight
• Photovoltaic panels, through photoelectric phenomenon, produce electricity in a
direct electricity generation way.
• Operating and maintenance costs for PV panels are considered to be low, almost
negligible, compared to costs of other renewable energy systems.
• PV panels have no mechanically moving parts, except in cases of sun-tracking
mechanical bases; consequently they have far less breakages or require less maintenance than other renewable energy systems (e.g. wind turbines).
• PV panels are totally silent, producing no noise at all; consequently, they are a perfect solution for urban areas and for residential applications.
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Contribution to Running Costs
The table below gives typical consumptions of standard electrical devices. Even when
electrical devices are turned off they may still be consuming power. Photovoltaic Solar
Panels can contribute towards the operation of these products with the contribution
given being determined by the amount of panels installed.
Customers may start with as little as one PS260AC Module and then increase their system
wattage as budget, time, and space permit. As each Photovoltaic AC module produces grid
compliant AC current, the modules serve as building blocks with no matching or string sizing
required.
The integrated Enphase Microinverter instantly converts DC electricity into ready to use AC
power. If an Enphase Envoy is installed, the intelligent Microinverter also sends vital health
and performance information to the Enphase communications gateway.
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Locating the Unit
Advantages
This next generation design eliminates the need for expensive DC wiring components
and centralized power inverters. Also, the Photovoltaic AC Module dramatically reduces the complex design and installation process associated with a traditional DC
solar power system.
AC Advantages
• High efficiency solar module integrated with an Enphase Microinverter, the world’s
most efficient AC system solution
• Higher Efficiencies than String Inverter systems
• Optimized for higher outputs in low light conditions
• Modules are individually optimized
• Eliminates module mismatch losses
• Any shading will affect only the shaded panel, not the entire system
• Easier to Design and Install
• Installation labour reduced, no DC switches, GFCI, etc. required
• Fast, inexpensive mounting - delivered ready for connection
• Pre manufactured cables
• Greater Productivity with more reliability
• AC wiring systems are more efficient at transporting electricity as they do not suffer
typical electrical losses that are common in all DC wiring circuits.
• More uptime means more kW-h generated
• Installers need not match PV output characteristics before installation
• Better Performance
• Individual PV breakages (e.g. hail) do not stop system power output
• No system mismatch losses
• Any shading will affect only the shaded panel, not the entire system
• Optional communication hub monitors every module independently
• Peak efficiency 96.3%, CEC efficiency 96%
• No single point of failure will disable the system
• AC Modules are sealed. No cooling vents mean that the units always stay clean
and dry inside
• Convection cooled with no moving parts
• Safer – no DC-side wiring (eliminates dangerous high voltage DC and all DC wiring
loss)
• Reduced inspection code issues
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Features
Advantages
Durability assured
Up to 17% module efficiency
Salt mist corrosion certification
Outstanding performance in weaklight conditions
Excellent temperature coefficient
giving higher yields in the long term
Ammonia corrosion certification
Fire test certification
Positive current sorting
A+ class in PI Berlin test
IP68 connectors enhance the reliability of the PV system
Certified to withstand increased
loads of up to 5400Pa
10-year product warranty
25-year performance warranty
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Locating the Unit
Maximising Performance
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installation manual
Transportation and Installation Notes
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Locating the Unit
Safety Instructions
General Safety
• The installation of a photovoltaic system requires specialized skills and knowledge
and must only be carried out by licensed/qualified persons.
• Installers should assume all risks of injury and do everything to avoid potential
damages and risks that might occur during installation, including but not limited to,
the risks of electric shock.
• Joule Pulsa modules do not need special cables for connection. All of the modules
have permanent junction boxes, cables and connectors.
• Do not use mirrors or magnifiers to concentrate sunlight onto the modules.
• The modules generate DC electrical energy from sunlight. They are designed for
outdoor use and can be mounted onto frames on rooftops or in the ground etc.
• Do not paint the module or attach anything on to the back of the module.
• Do not attempt to disassemble the modules, and do not remove any attached
nameplates or components from the modules.
Handling safety
•
•
•
•
•
•
•
•
When handling the module insulated gloves must be worn.
Inappropriate transportation and installation may break the module.
Do not lift or move the module by holding the junction box or cable.
Do not place anything on the module or press on the module surface.
Do not drop the module or allow objects to fall on the module.
Do not expose the back of the module to direct sunlight.
Do not wear metal ornaments while handling the module.
Do not install or handle modules in wet or strong windy conditions.
Installation safety
• Local, regional and state laws and regulations must be adhered to while installing a
photovoltaic system. For example, any necessary licenses must be obtained prior
to the installation commencing. Regulations around vehicles and ships must also
be observed during the installation.
• Observe all safety rules for the other system components, including the cables,
connectors, charging controllers, inverter and storage battery etc.
• Do not place the modules near a location where flammable gases are either generated or collected.
• Insulated gloves must be worn during the installation.
• Do not wear metal ornaments during the installation.
• Do not drill holes in the frame.
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• Under normal conditions, a module is likely to produce more current and/or voltage
than reported under Standard Test Conditions (STC). Accordingly, the values of ISC
and VOC marked on the module nameplate should be multiplied by a factor when
determining the component voltage ratings, conductor current ratings, fuse sizes,
and the size of controllers connected to the photovoltaic system. The exact factor
value should be suggested by a licensed/qualified person.
• The connecting ends with electricity may cause fire, spark or lethal shocks even
when the modules are not connected.
• Electricity can be generated when the modules are exposed to sunlight, even if
they are not connected. It is dangerous to touch 30V DC or higher, so never open
the electrical connectors or unplug the electrical connectors while the circuit is
under load, and do not touch the end with electricity during installations, when the
modules are exposed to sunlight.
• Children should be kept away from the photovoltaic system.
• In order to prevent current and voltage generation during installation an opaque
board can be used to cover the modules.
• Only use licensed/qualified insulated tools.
• The frame of the modules must be grounded according to local, regional and state
safety and electrical standards. A recommended connector or equivalent must be
used for the grounding cable. The grounding cable must be appropriately fastened
to the module frame.
• Only Balance of System (BOS) in conformity to local, regional, state safety electricity
standards and photovoltaic system such as connectors, cables and frames can be
used, avoiding affect on the module performance and/or damage it.
Fire Safety
• Consult your local authority for guidelines and requirements for building or structural fire safety.
• Roof constructions and installations may affect the fire safety of a building; an improper installation may create a hazard in the event of a fire.
• Use components such as ground fault circuit breakers and fuses as required by the
local authorities.
• Do not use the modules near a location where flammable gases are either generated or collected.
• The modules have been rated Fire Class C, and are suitable for mounting onto a
Class A roof.
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Technical Specification
Mechanical characteristics
Solar cells
Dimensions (mm)
Polycrystalline 156mm x 156mm square,
6 x 10 pieces in series
75mm / 2.95 inch
Collector width
992mm / 39.06 inch
Collector lenght
1640mm / 64.57 inch
Weight (kg)
21.6kg / 47.6lbs
Front glass
3.2mm toughened glass
H
1640
992
75
1360
860
8-9x14
Frame
Anodized aluminium alloy
Cable
0.90m wire (Ø4mm2)
Diodes
6 pieces Schottky by-pass diodes
Junction Box
W
IP65 rated
@208 VAC
@240 VAC
215W
215W
Nominal output current
1.0A
(arms at nominal
duration)
0.9A
(arms at nominal
duration)
Nominal voltage/range
208V / 183-229V
240V/211-264V
Extended voltage/range
208V/179-232V
240V/206-269V
Nominal frequency/range
60.0/59.3-60.5Hz
60.0/59.3-60.5Hz
Extended frequency/range
60.0/59.2-60.6Hz
60.0/59.2-60.6Hz
>0.95
>0.95
25 (3 phase)
17 (single phase)
Maximum Output Power
Power Factor
Maximum units per 20A branch circuit
Maximum output fault current
942
Frame (black)
992
1640
1.05 Arms, over 3 cycles; 25.2 Apeak,
1.74ms duration
Ambient temperature range
-40°C to +65°C
Weak light performance (DC module)
Intensity (W/m2)
Impp
Absolute maximum rating
Vmpp
Intensity (W/m2)
Impp
1000
1
1
Operating Temperature
800
0.8
0.996
Hail Diameter @ 80km/h
Up to 25mm
600
0.6
0.99
Surface Maximum Load Capacity
Up to 5400Pa
From -40 to +85°C
400
0.4
0.983
Maximum Series Fuse Rating
200
0.2
0.952
IEC Application Class (IEC 61215)
A
100
0.1
0.921
Fire Rating (UL 1703)
C
Note This publication summarizes product warranty and specifications, which are
subjected to change without notice. Additional information can be found on www.
phonosolar.com
1. Defined as standard deviation of thousands measurements. Absolute power
values depend on the measuring system. They can differ by +/-5% from one
measuring system to another.
2. Measurement conditions under irradiance level of Standard Test Conditions
(STC): 1000W/m2, Air mass 1.5 Spectrum, cell temperature of 25°C.
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H
AC Electrical typical values
Output Data (AC)
2-Ø4
Back sheet (black)
Collector height
L
15A
Temperature characteristics (DC module)
NOCT (Nominal Operation Cell Temperature)
45°C ± 2°C
Voltage Temperature Coefficient
-0.31%/K
Current Temperature Coefficient
+0.07%/K
Power Temperature Coefficient
-0.40%/K
PULSA PV
installation manual
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Locating the Unit
Mechanical Installation
(Note: All instructions hereafter are for reference only. A licensed/qualified person or
installer must be responsible for the design, installation, mechanical load calculation
and security of the photovoltaic system.)
Select suitable locations for installation
Select a suitable location for installing the modules.
Joule recommends that to achieve the best performance the modules should face
south. The exact tilt angle and orientation of mounted modules should be recommended by a licensed/qualified installer.
Clamp fitting: Use the provided module clamps on the long side of the module frame
to mount the modules in portrait orientation or on the short side of the module frame
for landscape orientation.
Components Supplied
• Module Frame
• Mounting Rail M8 Screw Split Washer
• M8 Bolt
• M8 Nut
• Flat Washer
• Mounting Rail
• Roof Fixing Bolts
• End Clamps
• Middle Clamps
• Drop Connectors
• Microinverters
• AC Lockable Isolator
• AC Junction Box
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Installation
Select the appropriate installation method as per the installation diagram. The module
clamps should not come into contact with the front glass and must not deform the
module frame. Avoid any shadowing effects from the module clamps.
The module frame cannot be modified under any circumstances. Regardless of the
orientation chosen, at least 4 clamps must be used on each module. For portrait orientation, 2 clamps should be attached to the long sides of the module and for landscape orientation 2 clamps should be attached to the short sides of the module.
Depending on the local wind and snow loads, additional clamps may be required. The
applied torque should be about 8Nm.
The modules should be completely free of shade at all times.
Do not place the modules near a location where flammable gases are either generated
or collected.
Mounting System
The system for the fixation of modules onto the cross beam rails allows for optimum
security and short mounting times giving the following benefits:
• Quick and convenient mounting
• Secure fixation with qualitity steel thread
• Application of standard components
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Locating the Unit
Mechanical Installation
Roof fixing bolts are drilled down through the slate or tile covering the roof. The rubber gasket on the bolt keeps the penetration point in the roof weather proofed. A UVresistant EPDM gasket with sealing cone and support collar is counter screwed with
a third mounting nut and safely seals the roof. The roof fixing bolt bolt is connected
to the profile by use of a stainless steel clamp of which one side which slides into the
square side of the horizontal profile. The bolt head slides through the profile to the
desired location where the second side of the clamp locks the profile into position.
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Locating the Inverter
• With the rail in position the Microinverters are then fitted.
• Each Joule Pulsa panel requires its own Microinverter and the Microinverters should
be fitted to the right hand side of the connection cables that are fixed to the Pulsa
panel.
• The supplied M8 square nut is positioned in the profile using the plastic positioner
supplied.
• The Microinverter is fixed to the rail using the M8 bolt.
• Use one inverter per module, one bolt per iverter
Installing Branch Connectors
In addition to the Enphase Microinverters, PV modules, mounting rail, and associated
hardware, you will need the following items.
Enphase equipment:
• Enphase Engage Cable. See “Selecting Engage Cable Type” on page 5 for options.
• Sealing caps, as needed (for any unused drops on the Engage Cable)
• Terminators, as needed (one needed at the end of each AC branch circuit)
• Enphase disconnect tool
Other items:
• Outdoor-rated, weather-proof AC junction box(es)
• Gland or strain relief fitting (one per AC junction box)
• Earthing (bonding) conductor
• Torque wrench, sockets, spanners for mounting hardware
• Adjustable spanner or open ended spanner (for terminators)
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Locating the Unit
Electrical Installation
Lightning Surge Protection
Lightning protection and resulting voltage surge are protected in accordance with BS
7671 and EN 62305-1. It is assumed that the PV modules are installed in accordance
with related standards and that the Microinverter is a part of a broader lightning protection system in accordance with BS 7617 and EN 62305-1, -3.
In some areas, the statistical frequency of lightning strikes near a PV installation is
high enough that lightning protection must be installed as part of an Enphase system.
In some areas, a surge protection device might be mandatory following a risk analysis,
according to local regulation, BS 7671, or NF C 15-100 (art. 443) & NF C 15-443L.
The first step to install the Engage Cable is to simply roll out the desired length and cut
it to size. One end is wired directly into the junction box at the head of the branch circuit,
eliminating the need for a separate AC interconnect cable. The other end is sealed from
the environment using an Enphase Branch Terminator. The Microinverter AC cable connectors are then plugged into the regularly-spaced connectors as shown.
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PULSA PV
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Installation Procedure
Installing the Enphase Engage Cable and Accessories involves several key steps:
1. Measure AC at the Electricity Network Connection
2. Install the AC Branch Circuit Junction Box
3. Position the Enphase Engage Cable
4. Attach the Microinverters to the Mounting Rail
5. Dress the Enphase Engage Cable
6. Terminate the Unused End
7. Connect the Engage Cable to AC Junction Box(es)
8. Verification and Commissioning
Risk of Electrical Shock
Due to presence of exposed conductors, DO NOT connect the Enphase Microinverters to the electricity network or energize the main AC circuit(s) until you
complete all of the installation procedures as described in the following sections.
Step 1 – Measure AC at the Electricity Network Connection
Measure AC line voltage at the electricity network connection to confirm that it is
within range. Acceptable ranges are shown in the following table.
Single-Phase Service
Three-Phase Service
L1 to neutral
L1 to L2 to L3
207 to 253 Vac
360 to 440 Vac
Be sure the Engage Cable you are using matches the electricity network connection
at the site. Use 5G2.5 Engage Cable at sites with three-phase (and neutral) service,
or use 3G2.5 Engage Cable at sites with single-phase service. Check the labelling on
the drop connectors to verify the voltage type.
Enphase Microinverters are designed to operate phase-to-neutral. When multiple
phases are present at sites with single-phase service, connect only one phase to each
Microinverter branch. Connecting multiple phases to a Microinverter branch circuit
will damage or destroy the Microinverters.
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Locating the Unit
Electrical Installation
Step 2 – Install the AC Branch Circuit Junction Box
Risk of Electrical Shock.
• Be aware that installation of this equipment includes risk of electric shock. Do not
install the AC junction box without first removing AC power from the Enphase System.
• Use electrical system components approved for wet locations only.
• When stripping off the Engage Cable sheath, make sure that the conductors are not
damaged.
• Loose cables might become a tripping hazard. Dress the Engage Cable to minimize
this potential.
• Do NOT exceed the 17 Microinverters in an single phase AC branch circuit, and
protect each Microinverter AC branch circuit with a 20 A maximum breaker (or in
accordance with local installation code).
• Size the AC cable/wire size to account for voltage drop. Select conductor diameter
based on the distance from the beginning of the Microinverter AC branch circuit to
the breaker in the AC mains.
• All components of system wiring must be considered, including internal voltage
drop within the length of Engage Cable. Typically, three wire sections and several
wire terminations must be quantified. There is also some resistance associated
with each circuit breaker. As all of these resistances are in series, they add together.
Since the same current is flowing through each resistance, the total voltage drop is
total current times the total resistance.
• For a single-phase system, the total resistance is equal to two times the one-way
resistance. For a three-phase system, each of the three line currents and resistances must be calculated.
Standard guidelines for voltage drop on feeder and AC branch circuit conductors might
not be sufficient for Microinverter AC branch circuits that contain the maximum allowable
Microinverters. This is due to high inherent voltage rise on the AC branch circuit.
• Install an outdoor rated, weather-proof AC junction box at a suitable location on the
mounting rail (typically at the end of a row of PV modules).
• Provide an AC connection from the AC junction box back to the electrical utility
connection, using equipment and practice as required by local standards.
• Enphase Microinverters are designed to operate phase-to-neutral. When multiple phases are present at sites with single phase 230V service, connect only one
phase to each Microinverter branch. Connecting multiple phases to a Microinverter
branch circuit will damage or destroy the Microinverters.
Step 3 – Position the Enphase Engage Cable
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PULSA PV
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• Position the Engage Cable to the right hand side of the centre of the panel so that
connectors that are attached to the panels are not obstructed when fitting the Joule
Pulsa panel to the mounting rail.
• Lay the Engage Cable along the route it will travel, positioning the connectors so
that they align with the PV modules.
Step 4 – Attach the Microinverters to the Mounting Rail
Mount the Microinverters as per the diagram below. Ensure both that the Microinverter does not interfere with the PV module frames and that the AC connector from
the Microinverter can easily reach the AC connector on the Engage Cable.
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Electrical Installation
Step 5 – Dress the Engage Cable
Adhere to the following requirements:
• Do not expose the connection to directed, pressurized liquid (water jets, etc.).
• Do not expose the connection to continuous immersion.
• Do not expose the AC connector to continuous tension (e.g., avoid pulling or bending the Engage Cable near the connectors)
• Do not allow contamination or debris in the connectors.
• Use the Engage Cable and Accessories only when all parts are present and intact.
• Fit the connection using only the prescribed tools.
• There are two release holes in the connector. These holes are to be used only for
disconnecting. Keep these release holes clear and accessible.
• Dress any excess in loops so that Engage Cable does not contact the roof.
Tripping Hazard. Loose cables might become a tripping hazard. Dress the Engage
Cable to minimize this potential.
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PULSA PV
installation manual
• Place tie wraps on either side of the drop connector. Use one or two tie wraps, or
other support scheme to secure the Engage Cable between connectors.
• Remove and discard the temporary shipping caps from the Engage Cable.
• Connect the Microinverter and listen for two clicks as the two prongs engage. Ensure that both latching mechanisms engage.
• The connector is not designed for repeated plugging and unplugging.
• Cover any unused connector with a sealing cap. Listen for two clicks as the connectors engage. Ensure that both latching mechanisms engage.
• Ensure the gasket seal is intact and fitted correctly to the drop connector before
connecting to the Microinverter. If the gasket is not correctly in situ the system
will not have an IP67 rated connection.
AC Drop Connector
Gasket gives IP67 seal
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Locating the Unit
Electrical Installation
• Install sealing caps on all unused AC connectors. Unused AC connectors are live
when the system is energized.
• Do not use the shipping cap to cover unused connectors. The shipping cap does
not provide an adequate environmental seal. Enphase sealing caps are required for
protection against moisture ingress.
• Enphase sealing caps are IP67 rated. Within the term “IP67”, “IP” indicates an
Ingress Protection (IP) rating against dust and liquids. This specific rating of IP67
indicates that this connector protects against all dust particles and immersion in
liquid.
• If you need to remove a sealing cap, you must use a disconnect tool.
Step 6 – Terminate the Unused End of the Engage Cable
Attaching the Terminator
The terminator is intended for one-time use only. If you open the terminator following
installation, the latching mechanism is destroyed and the terminator cannot be used
again. If the latching mechanism is defective, the terminator must not be used. The
latching mechanism must not be circumvented or manipulated.
Adhere to the following requirements:
• Use the terminator assembly to seal the conductor end of the Engage Cable. No
other method is allowed.
• Do not expose the terminator to directed, pressurized liquid (water jets, etc.).
• Do not expose the terminator to continuous immersion.
• Do not expose the terminator to continuous tension (e.g., avoid pulling or bending
the Engage Cable near the terminator)
• Use the terminator only when all parts are present and intact.
• Fit the terminator using only the prescribed tools.
To attach the terminator:
Check the terminator for completeness. It is made up of the individual parts shown.
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PULSA PV
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To guarantee the safety of the wire organizer and to ensure that it remains sealed,
please make sure that all parts are present and that all seals are seated correctly in
the wire organizer.
The wire organizer must be complete, as shown.
Risk of Electrical Shock. The terminator must not be installed while power
is connected.
At the end of the Engage Cable, strip at least 60 mm (2.5 inches) of the cable sheath
from the conductors.
If the exposed wires are damaged, system function can no longer be guaranteed.
Slide the hex nut onto the Engage Cable.
• Insert the Engage Cable end all the way into the wire organizer (up to the stop).
• Bend the individual wires into the slots (spaces) on the wire organizer.
• Using a diagonal cutter, trim wires to the correct length so that they fit cleanly into
the slots (spaces) in the wire organizer.
• Press the cap onto the wire organizer, bending the wires into the slots of the wire
organizer. If the wires resist being pressed into the cap, you may need to trim the
wires a little further.
• Screw the hex nut onto the cap. Never unscrew the hex nut as this can twist and
damage the cable.
• Insert a #2 Philips screwdriver into the slot on the cap to hold it in place. (Alternatively you can hold the cap firmly in place using the disconnect tool).
• Use a 22mm (7/8 inch) spanner and tighten the nut until the latching mechanism
has been screwed all the way to the base.
• Use a tie wrap to attach the cable to the mounting rail, so that the Engage Cable
and terminator do not touch the roof.
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Electrical Installation
Replacing or Removing the Terminator
• If the terminator must be replaced or removed, observe the following.
• Risk of Electrical Shock. Be aware that installation of this equipment includes risk
of electric shock. Do not install the AC junction box without first removing AC power from the Enphase System. Never open, remove or replace the terminator while it
is connected to the power supply.
• Damage to the latching mechanism cannot be seen with the naked eye. Label the
opened terminator and dispose of it immediately to ensure that it cannot be reused
accidentally.
• The terminator is intended for one-time use only. If you open the terminator again
following the installation, this will destroy the latching mechanism, meaning that the
unit then cannot be used again.
• Remove the terminator by cutting it off using a diagonal cutter set flush against the
end of the Engage Cable.
• Replace the terminator as described in the previous steps.
Step 7 – Connect the Engage Cable to AC Junction Box(es)
Perform the following steps in accordance with local standards.
• Connect the Engage Cable into the AC branch circuit junction box using an appropriate gland or strain relief fitting. It requires a strain relief fitting with an opening of
1.3 cm (0.5 inches) in diameter.
• Connect the Engage Cable into additional AC junction boxes as needed to transition to conduit between smaller sub-arrays. Remember to adhere to AC branch
circuit limits for the Microinverters being used.
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Fitting Branch Termination Endcap
PULSA PV
installation manual
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Locating the Unit
Electrical Installation
Fixing the Pulsa Solar Module to the rails
1.Push click components into the upper groove of the cross beam profile, insert
square nuts into the click components and distribute at approximate distances
along the length of the profile.
2.Loosely attach the first two end clamps with serrated M8 screws (or screws with
locking nuts) at the end of the cross beam rail.
3.Then position the first module and loosely secure with end clamps (the end clamps
should be placed at least 5mm from the outer edge of the cross beam). Now adjust
the first module in line with the cross beam.
4.When mounting with clamps, click these into the required position, arrange flush
with the modules and tighten screws. After aligning the first module in each row, a
middle clamp is loosely fastened to the corresponding cross beam.
5.The next module is then connected, shifted beneath the module clamp and secured.
6.The first middle clamp is then tightened.
7.Repeat steps 5 and 6 until all panels are in position.
8.Repeat steps 2 and 3 for the edge last panel
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Electrical Installation - Microinverter
The Microinverter with integrated ground delivers increased energy harvest and reduces design and installation complexity with its all-AC approach.
With the advanced M215, the DC circuit is isolated and insulated from ground, so no
Ground Electrode Conductor (GEC) is required for the Microinverter. This further
simplifies installation, enhances safety, and saves on labor and materials costs.
Productive, Simple, Reliable
• Maximizes energy production
• Minimizes impact of shading, dust, and debris
• No single point of system failure
• No GEC needed for Microinverter
• No DC design or string calculation required
• Easy installation with Engage Cable
• More than 1 million hours of testing and millions of units shipped
• Industry-leading warranty, up to 25 Years
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Electrical Installation - Microinverter
Technical Specification
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Electrical Installation - Microinverter
Electrical Installation
Legend
1. Joule Pulsa Photovoltaic Panel
2.Microinverter
3. Drop Connector
4. Branch Terminator
5. Junction Box
6. 20A Lockable 2-pole AC Isolator
7. PV Generation Meter (not supplied)
8 Consumer Board
9. Utility Meter
10.Cut Out Fuse
Notes
1.IMPORTANT: Check the L to N voltage at the point of connection. This must be in
the range 207 to 253V.
2.All wiring and equipment designed must be installed in accordance with the most
recent edition of BS 7671 and must by a qualified Competant Person
3.All calculations assume Ze = 0.35Ω at the point of connection (ie consumer unit).
4.AC Cable between junction box and the consumer board to be sized based on a
total voltage drop not exceeding 1%.
5.Typically a single phase engage cable branch is terminated into a 1-pole 20A Type B MCB
6.The Microinverter uses a HF transformer which provides simple separation. A Type B
RCD is NOT required. A Type AC RCD may be required as a result of the AC circuit
design.
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Engage and Wire Sizing Overview
The Engage Cable is a continuous length of 2.5mm2 stranded copper, outdoor rated
cable, with integrated connectors for the Microinverters. The Engage Cable is available either with 1.025 meters between connectors for PV modules in portrait orientation or with 1.7 meters between connectors for PV modules in landscape orientation.
Voltage type / conductor count Connector Spacing PV module orientation
230/240 Vac, 4 conductor 1.025 m Portrait
230/240 Vac, 4 conductor 1.7 m Landscape
In this document, calculations are provided for both Engage Cable options. Regardless of the application, Joule recommends that the total percentage of voltage rise in
the AC wiring be less than 2%, with (an inclusive) less than 1% voltage rise.
All components within the system wiring can add resistance and must be considered
when calculating the total VRise. Typically, the resistance of three distinct wire sections
and several wire terminations must be quantified. There is also some resistance associated with each OCPD (Over Current Protective Device), typically a circuit breaker. As all
of these resistances are in series, they are cumulative. Since the same current is flowing
through each resistance, the total VRise is simply the total current times the total resistance.
For a single-phase system, the total resistance is equal to two times the one-way resistance.
Wire sizing is very important because improper wire size can result in nuisance tripping of
the Microinverter’s utility protective functions. This results in loss of energy harvest.
What Contributes to Voltage Rise
Enphase Microinverter systems are installed as dedicated branch circuits. Each dedicated branch circuit of the Microinverters is protected by a 20A OCPD. Wire size, circuit
current, circuit, length, voltage margin, and utility voltage must all be considered.
Wire size: Of course, there is a tradeoff to be made between increased wire size and
increased cost. The wire size can often be increased by one trade size with minimal cost
impact. At some point, however, increasing the wire size necessitates increases in wiring
and conduit costs can be offset by the increase in energy production over the lifetime of
the system.
Circuit current: The circuit current will vary depending on which ‘wire section’ is being
considered in the installation. See ‘VRise Calculations by Wire Section’. A typical installation will contain three wiresections. In the Engage Cable (wire section 1), the current
increases with each inverter added to the circuit.
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Electrical Installation - Microinverter
Circuit length: There is often little choice in circuit length, but center-feeding the dedicated branch circuit will significantly reduce voltage rise within the branch, See ‘Advantages
of Center-Feeding the AC branch Circuits’ in the following section.
Voltage margin: If the service voltage is chronically high, the utility will sometimes perform a tap change on the distribution transformer. This can provide a percent or two of
additional voltage margin
Utility voltage: The utility strives to maintain voltage at the main service meter within a
certain percentage of nominal. The protective functions of the Microinverters are set to
+10%/-12% by default, but your local utility may have alternate requirements. The high
voltage end of the tolerance is of most concern because inverters are a source and not a
load. If the utility is consistently 5% high, this leaves less than 5% for all wiring and interconnection losses and inverter measurement accuracy. If you are concerned about the
utility’s voltage, you may request that your utility place a data logger at the main service
meter and make a record of the voltages available to you at the site.
Sample Calculation
The following example is for a fully populated branch circuit of 17 Microinverters.
•
•
•
•
•
Microinverter full load AC current = 0.93 amps
Wire gauge for individual branch circuit = 4mm2 CU
4mm2 CU resistance = .00461Ω/m (4.61ohms/km)
Length of individual branch circuit = 15m
Two way wire length= 30m
Vrise = (0.93 * 17) * (0.00461Ω/m) * (15m * 2)
= 15.81 * 0.00461 * 30m
=2.19 volts
=2.19 volts / 230 volts = 0.95% Vrise
*The voltage rise from the junction box to the Microinverter subpanel is 0.95% Voltage
Rise from the Microinverter Subpanel to the Main service meter Vrise = (Amps/inverter *
#inverters) * (resistance Ω/m) * (2 way wire length)
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Example:
•
•
•
•
•
•
3 branches of 17 = 51 M215s
current of 3 branches = 47.43A
wire gauge for sub-panel feed = 25mm2 CU
35 mm2 CU resistance = .000524Ω/m
Length of Microinverter sub-panel feed = 30m
Two way wire length = 60m
VRise = (51 * 0.93A) * (0.000524Ω/m) * (30m * 2)
= 47.43A * 0.000524Ω/m * 60m
= 1.49 volts
= 1.49 volts / 230 volts = .6% Vrise
* The voltage rise from the Microinverter sub panel to the main service meter is 0.6%
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Electrical Installation - Microinverter
Voltage Rise for M215s with the 230V Engage Cable
230V Engage Internal VRise
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Step 8 – Verification and Commissioning
Prior to final connection to the electricity network, ensure that all AC and DC wiring is
correct.
•
•
•
•
•
Ensure that none of the AC and DC wires are pinched or damaged.
Ensure that all AC junction boxes are properly closed.
Ensure that all unused connectors are capped.
Ensure that all connectors are properly seated.
Install the Microinverters and commission the system as instructed by the Enphase
Microinverter installation and operation manual and in accordance with all local and
national requirements.
Start Up Sequence
1. Ensure the PV system MCB and the AC isolator are set to ON
2. Wait 3 minutes for the Microinverter system to start up.
3. A flashing green LED light on each Microinverter indicates that the system is operating correctly
Shut Down Sequence
1.Turn OFF the AC isolater between the consumer unit and the PV panels
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Maintenance
The Microinverter system requires virtually no maintenance and provides you with
trouble-free energy production.
Visually inspect the modules (panels), especially after storms, hail and high winds
An inspection from the ground, with binoculars if needed, is usually sufficient. Check
the array for dust, debris, leaves, and other soiling. Clean solar modules generate
maximum energy harvest.
Some geographic regions do not have much dust, debris, and pollution, so solar
modules remain relatively clean and maintain optimum energy performance. In other
areas, rain and snow naturally clean modules and help maintain performance.
Perform an annual check
In order to ensure optimum module performance, Joule recommends the
following:
• If necessary, the glass front of the module can be cleaned with water and a soft
sponge or cloth. A mild, non-abrasive detergent can be used to remove more stubborn stains.
• Check the electrical and mechanical connections periodically and make sure they
are clean, safe, complete and secure.
• In the event of a problem, consult with a licensed/qualified person
Talk to your solar professional about performing a yearly check. Your solar professional can inspect your array and verify that the electrical and mechanical connections are
intact and working efficiently.
Monitor system performance
An add on Photovoltaic Envoy can be purchased to check energy production from
your Enphase Microinverters on MyEnlighten to compare the month-to-month, or the
year-to-year performance of your system.
For example, use the MyEnlighten energy grid or generate a report and compare the
energy production for one month to the same month in the previous year. Is it the
same or lower? If lower, did cloud cover reduce energy production? If not, you may
want to perform a visual inspection of your array and check for debris.
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Replacing a Microinverter
To ensure the Microinverter is not disconnected from the PV modules under load, adhere to the following disconnection steps in the order shown:
1. Using a clamp-on meter, verify there is no current flowing in the DC wires between
the PV module and the Microinverter. Take care when measuring DC currents due
to the fact that most clamp-on meters must be zeroed first and tend to drift with
time.
2. Disconnect the PV module DC wire connectors from the Microinverter.
3. Disconnect the Microinverter AC connector from the Engage Cable.
4. The Microinverter connectors are tool-removable only. To disconnect a Microinverter from the Engage Cable, insert these two prongs into the two holes in the
AC connector. Squeeze the sides of the disconnect tool to engage with the AC
connector. Rock the connector back and forth while pulling gently to disengage.
5. Remove the Microinverter from the mounting rail.
Risk of Electrical Shock. Do not leave the drop connector uncovered for an extended period. If you do not plan to replace the Microinverter immediately, you must
cover any unused connector with a sealing cap. Listen for two clicks as the cap
engages. Sealing caps may not be reused
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JOULE IE
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JOULE PL
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