Survey
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
1 Stand-alone PV system for residential charging station for an Electric Vehicle Aaditya Vaishampayan Ninad Sonje (PV engineers, Second Solar, Inc.) 2 Problem Statement To design a stand-alone PV system for residential charging of an Electric Vehicle. The system must be independent of the existing residential electrical systems as well as the grid. Must be able to provide enough charge required for daily commute. 3 Design Considerations The residential charging system is located in the Phoenix area. The PV system is a fixed tilt type system with tilt equal to latitude. The Electric vehicle used to design is a Chevrolet Bolt. Battery rating: 60 kWh, Range: 238 miles on full charge. Two days of autonomy for the charging station. Assuming a maximum of 100 miles commute daily. Micro-inverters used in place of string inverters. Battery Bank required to provide energy when PV system is not generating power. 4 PV module : Panasonic (N310k HIT module) Total system size: 11.1 kW Rated power of module: 310 W Heterojunction Technology module Total no of modules required: 37 5 Charge Controller: Outback (GS 4048A) Takes both AC and DC inputs. Output voltage can be set from 110 -240V and 50-60 Hz. Works with 48 V battery banks. Has grid integration capabilities. 6 Inverter: ABB Microinverter MICRO-0.3HV- I Has its own MPPT controller. Can take maximum of 360 W. Has its own data link for monitoring performance. Has in-built ground fault detection. 7 Crown Renewable Power (mono-block series 27) Sealed Lead Acid batteries designed for deep discharge cycles. 12 V , 115 Ah capacity. Can handle 1800 cycles at 50% depth of discharge. Uses glass mesh layers for efficient recovery of lead oxide during charging. Maintenance free, comes with a stacking enclosure. 8 Block diagram of the system Charging port Charge controllers Battery Bank PV ARRAY with microinverter 9 Economics Component description Manufacturer Quantity Cost PV module Panasonic (N310K HIT module) 37 $15540 Inverter ABB MICRO0.3HV- I 37 $10175 Charge Controller Outback (GS 4048A) 3 $6300 Battery Crown Renewable Power (monoblock series 27) 16 $9200 Total $41,215 10 Conclusion Total system cost is very high (around $50 k). Saving are also very low (around $4500). Return on investment more than 12 years, thus not feasible. Battery technology is evolving rapidly, so system may become feasible in future. Thank you! 11