Best Generators by Use

Short answer: the right generator is set by what you are powering, not by brand. For automatic, hands-off whole-house backup with central AC, you need a 10,000–22,000W standby. To ride out a power outage on essentials (fridge, a few circuits, maybe a well or sump pump), a 3,500–7,500W portable is enough. For RV & camping, a quiet 2,200–3,500W inverter matched to your rig’s AC is the pick. Choose your use case below, or run your exact load →

A generator is sized by adding the running watts of everything you want on at once, then adding the single largest startup surge on top — not by guessing a brand. Because the heaviest motor (a central AC compressor, an RV rooftop unit, a well pump) drives both that running total and the surge, the same house needs very different generators depending on whether you want full automatic backup or just the essentials kept alive. Pick the guide that matches your goal. Product links are Amazon affiliate links and never change the advice.

Pick your use case

Best for a Whole House 10,000–22,000W standby — automatic backup including central AC and electric heat. See whole-house picks → Best for a Power Outage 3,500–7,500W portable — keep the fridge, lights, and a pump running through a storm. See outage picks → Best for RV & Camping 2,200–3,500W inverter — quiet, fuel-efficient, sized to your rooftop AC. See RV picks →

Not sure which load class you fall in? The calculator adds your appliances and the single largest surge for you. Run your exact home or rig → and read running vs starting watts first — it’s the number most people get wrong.

Standby generators, transfer switches, and any permanent wiring must be installed by a licensed electrician per NEC and local code — never backfeed a generator into an outlet. These pages give equipment-sizing estimates only. Backfeeding endangers utility line crews and can start a fire when power returns.

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