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Inverter Sizing
Recommend inverter AC rating from PV DC and DC/AC ratio.
ElectricalCore inputs only — quick sizing with engineering defaults.
Inputs (SI units)
Results
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Engineering Formula
- P_ac = P_dc / (DC/AC)
- S_ac = P_ac / PF [kVA]
- Oversizing % = (DC/AC − 1) × 100
Inverters are typically DC-oversized to clip infrequent peaks and lift CUF. 1.10–1.30 is standard for India / IEC climates.
Step-by-step Calculation
- 1.AC
Pdc/(DC/AC)8.33 kW - 2.kVA
Pac/PF8.33 kVA
Design Assumptions
- • Losses in DC combiners < 2%.
- • Ambient inverter derating negligible up to 45 °C.
Engineering Tips
- ◆Pick the next standard AC rating up (5, 10, 15, 25, 40, 50 kW).
- ◆Balance strings equally across MPPTs.
Warnings
- ▲DC/AC > 1.35 risks clipping > 3% and voids some warranties.
Standards & References
IEC 62109-1/2IEEE 1547CEA Technical Standards (India)
Related Solar Calculators
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Copper/Aluminium cable size from voltage drop and thermal derating.
Voltage Drop Check
Voltage drop and % for a chosen cable size.
PV String Sizing
Min/max modules per string against inverter MPPT and DC voltage.
Fuse & Breaker Sizing
Overcurrent protection per NEC / IEC.
Conduit Fill
Conduit size for cable bundle at 40% fill.
Hybrid Inverter Sizing
Recommend hybrid inverter for PV + battery + backup.