PV Sizing.xmcd
(Background) An energy efficient house in Fresno, CA (Latitude at 22 degrees) is to ve fitted with a rooftop PV array that will annually replace all of the 3600 kWh/year of electricty that the home uses.
(Assumption):
(1) Roof is south facing with a moderate tilt angle.
(2) Annual Insolation for L-15 is 5.7 kWh/m2-day ----> (5.7 Peak Sun Hours)
(3) DC-to-AC conversion efficiency is 75%
(4) PV array average 1-sun efficiency (or Capacifty Factor, CF)is 12.5%
(Q): How many
Annual Energy Production Equation (for PV)
SOLUTION
1. Annual Energy (AC) Required is 3600 kWh (Eann):
kWh/year
Peak sun hour
2. Required AC Power Generation from PV system (Pac):
kW
3. Required DC Power Generation from PV array (Pdc):
DC to AC Conversion Efficiency
kW
4. PV Array Area (A):
PV Efficiency (η):
m2
5. Selection of PV Module
6. Selection of Inverter Module
6. Number of Modules Needed (Npv):
3 strings:
5 rows
7. Verification
kW
kWh/year
m