C&I rooftop is the biggest volume segment for Chinese solar exports after utility. This guide walks through a typical 500 kW procurement from spec to delivery.
Typical 500 kW CapEx (ex-install)
$0.28–0.36/W
modules + inverters + BOS
String inverter for C&I
Sungrow SG110CX, Huawei SUN2000-100KTL
Standard payback
3.5–6 yr
EU commercial tariffs
Bill of materials for a 500 kW project
| Item | Quantity | Estimated CIF cost |
|---|---|---|
| 620W TOPCon bifacial modules | 810 pcs (502 kW) | $58,720 |
| 110 kW string inverters (Sungrow SG110CX) | 5 units | $11,500 |
| Aluminium mounting rails + clamps | 500 kW | $11,000 |
| DC cables, MC4 EVO2 connectors, DC combiners | 500 kW | $6,400 |
| AC cables, distribution, monitoring | 500 kW | $8,200 |
Frequently asked questions
QShould I bundle modules + inverters from the same supplier?
Modules and mounting from one supplier can work well. Inverters are usually a separate procurement — the top inverter OEMs (Sungrow, Huawei, Goodwe) don't make modules and vice versa.
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