Power station runtime calculator
How long will this model run my load? Pick a model, enter the load in watts and see the hours, plus common loads for the same model.
How this is worked out
- Runtime = rated Wh (plus any expansion) × efficiency × temperature factor ÷ load W.
- Efficiency of 85% is a typical figure (the same as the main calculator), not a maker spec. Real units vary with load level.
- The temperature factors are rough planning assumptions, not maker figures. See the cold weather check for maker temperature limits.
- Output and surge ratings, and expansion limits, come from the maker's page for each verified model. Only verified models are listed.
- Fridge and pump values are typical running watts times the share of time they run, so they are averages.
Related: medical device runtime · backup power calculator. We list no prices and have not hands-on tested any product.