Find your climate zone here.
DC Rating (kWPV):
The DC rating is calculated using the formula:
DC Rating = (CFA * CFAa) / 1000 + (NDU * NDUa)
where CFAa and NDUa are constants based on the climate zone.
If your DC rating exceeds 1.8, you might be required to install a PV system
See Fact Sheet: Single-family and Low-rise Multifamily Solar and Battery Systems 2022 for more info