Solar PV Array Engineering & Sizing Formula
To calculate the required DC photovoltaic array capacity for zero-bill net-metering under NEPRA (National Electric Power Regulatory Authority) and local DISCO (LESCO, IESCO, FESCO) bi-directional billing, HelioVolt applies standard regional derating:
| Monthly Units | Array Sizing | Recommended Inverter | Storage Bank (LiFePO4) |
|---|---|---|---|
| 350 – 500 kWh | 3.6 – 4.5 kWp | 5.0 kW Single-Phase Hybrid | 5.12 kWh (51.2V 100Ah) |
| 700 – 1,000 kWh | 7.0 – 9.0 kWp | 8.0 – 10.0 kW 3-Phase Hybrid | 16.07 kWh (51.2V 314Ah) |
| 1,200 – 2,000 kWh | 12.0 – 18.0 kWp | 15.0 – 20.0 kW Commercial | 32.14 kWh (2× 314Ah Parallel) |