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Generator Capacity Calculator

Calculate the recommended backup generator size from connected load and demand factors.

Formula v1.0.0GlobalMethodologygenerator-capacity-v1
How this is calculated
kVA = (Connected load × diversity factor) ÷ power factor

About this calculator

The generator capacity calculator applies a diversity/demand factor and power factor to your total connected electrical load to estimate the generator size (in kVA) needed to reliably back it up.

Worked example

50kW connected load, 0.7 diversity, 0.8 power factor

Result: Recommended generator size ≈ 43.75 kVA

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