Download Solar Batteries

Solar Batteries
• Batteries are a key
component of both
grid tie w/ back-up
and stand alone solar
energy systems
Three Types of
Batteries used in Solar Systems:
• Flooded lead acid
• Absorbed Glass Mat Sealed Lead Acid
• Gelled Electrolyte Sealed Lead Acid
Flooded Lead Acid
•Have longest track record in solar
usage
•Longest lifespan
•Least cost per amp hour
•High maintenance
Absorbed Glass Mat Sealed Lead
Acid
•Ideal for grid tied solar w/ battery
back-up
•Low to no maintenance
•Becoming more affordable
Gelled Electrolyte Sealed Lead
Acid
•Charges slower than other two types
•Predates AGM batteries but are
losing market share
Deep Cycle vs Shallow Cycle
Deep
• Deep cycle batteries
can be repeatedly
discharged to 80% and
recharged without
damaging them
• Recommended for use
with solar
Shallow
• Occurs when the top
20% or less of the
batteries energy is
discharged and then
recharged
• Shallow cycle
batteries not
recommended for
solar use
Weather Effects Batteries
Performance
•The charging and discharging of the
batteries is governed by temperature
and charge/discharge current
•The colder the temp. the slower the
reactions, and the warmer the faster
the reactions
•Optimum temp. for a lead acid
battery is 77 degrees F
Keep good care of your batteries!
•Battery voltage should be kept at or
above 50% state of charge at all times
for maximum battery life
•Use only distilled water to fill
batteries, never tap
•Keep batteries electrolyte level at the
marked full level
The End.