I was designing up an off-grid solar system for a village(no genset involved).
Peak load is about 10.3 kW
Daily consumption is 79 kWh/day (about 250 households)
Considering DOD of 60%(and 90% discharging eff.) and rest all efficiency, battery size was estimated at 140kWh.
Inverter chosen was 48VDC-230VAC ( 3 inverters of about 4.5kw).
So batteries were put in series to have 48V bus. Two strings were chosen for reliability. So per string Ah = (140*1000)/48 = 1500Ah.
only 2v batteries have such large capacities . So a total of 48 2V (2strings of 48V) batteries were chosen.
Considering everything PV wattage =25kW.
So i might need about 4-5 80A charge controller depending upon my array voltage.
System Layout
PV(25kW) - Controller(80A*4) - Battery(2v 2 strings 24bat/string) - Inverter(48V-230AC 3*4.5kW) - LOAD
Does it look like a realistic system??
Peak load is about 10.3 kW
Daily consumption is 79 kWh/day (about 250 households)
Considering DOD of 60%(and 90% discharging eff.) and rest all efficiency, battery size was estimated at 140kWh.
Inverter chosen was 48VDC-230VAC ( 3 inverters of about 4.5kw).
So batteries were put in series to have 48V bus. Two strings were chosen for reliability. So per string Ah = (140*1000)/48 = 1500Ah.
only 2v batteries have such large capacities . So a total of 48 2V (2strings of 48V) batteries were chosen.
Considering everything PV wattage =25kW.
So i might need about 4-5 80A charge controller depending upon my array voltage.
System Layout
PV(25kW) - Controller(80A*4) - Battery(2v 2 strings 24bat/string) - Inverter(48V-230AC 3*4.5kW) - LOAD
Does it look like a realistic system??
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