Mid ~1000 Wh class

Sweet spot for many weekend campers: fridge + devices for about a day (or two light days).

Example sizing for a 12-hour outage: mini fridge 40 watts times 12 hours is 480 Wh, laptop 180 Wh, LED 50 Wh, phone 20 Wh, total 730 Wh. A 15 percent buffer makes 839.5 Wh. Divided by 0.90 depth of discharge and 0.90 inverter efficiency, the AC nameplate is about 1,036 Wh, which fits the about 1,000 Wh class (results 513 to 1,152). Compare that result to the station label. All 12 V DC devices would be about 933 Wh. The fridge 40 W is an average because the compressor cycles.
EXAMPLE. 480 + 180 + 50 + 20 = 730 Wh. 730 × 1.15 = 839.5. 839.5 / 0.90 / 0.90 = 1,036.42, shown as ~1,036 Wh. 12 V DC skips the inverter: 839.5 / 0.90 = 932.78, shown as ~933 Wh. Fridge 40 W is an average over the window.

Delivered usable ≈ 810 Wh @ defaults. Matches the WattNeeds camping sample (~809 Wh recommended nameplate for a 570 Wh day).

Related: 500 vs 1000 · weekend camping

Wh calculator — nameplate = (Wh/day × days × 1.15) / (0.90 × 0.90).

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