Enter your total running load and your biggest motor appliance. We'll size continuous and surge capacity and round up to a standard inverter size.
Standard sizes shown: 1, 1.5, 2, 3, 3.5, 5, 6, 8, 10, 12, 15, 20 kVA. Always round up, never down.
Inverters are usually the component people undersize, because a spec sheet's "peak power" figure looks generous until a fridge and an air conditioner try to start at the same moment. Sizing for surge — not just running watts — is what keeps the inverter from tripping.
Neither directly — size it to your load. Then check it against your battery's max continuous discharge rating and your array's peak output so none of the three components bottleneck the others.
20-25% is standard. It leaves headroom for adding appliances later and for the modest efficiency loss inverters have as they approach full rated output.