Most solar calculators tell you kilowatt-hours. This one tells you whether your fridge survives December.
Click the map or drag the pin. Sunlight varies enough across a country that a national average is useless — Seattle and San Diego differ by nearly half.
Pick only what genuinely cannot go dark. Every extra item multiplies the battery you have to buy and carry.
Days you want to survive with no sun at all: 2
A storm that takes the grid down usually takes the sunshine with it. Two days is a sensible floor; one day assumes the weather clears immediately.