Generator sizing

Σ load + surge currents + 25% headroom

What to power

Power

running: 650 W

1 125 W

Peak (with surge)
900 W
Devices
4

Fridge/pump surge currents are 2–3× running watts — take the max peak. A generator should run at 60–80% of rated: less means wet-stacking, more means overload. Inverter type for electronics, conventional is cheaper for heaters.