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Most watts per dollar.

Generators are sold on peak watts and brand hype. What matters is running watts, the power it actually supplies, and how much of it you get for your money. This ranks every popular model by cost per 100 running watts. Filter by inverter or conventional, since they are different tools, then size it to what you need to power.

Prices reviewed 31 July 2026 . Generator prices spike around storm season, so check the live listing.

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Generator Running W Peak W Fuel Type Price $/100W
WEN 56877 (8750W)Best value7,0008,750GasConventional$600$0.09Check price
Westinghouse WGen95009,50012,500GasConventional$900$0.09Check price
Predator 9000 Open Frame7,2509,000GasConventional$700$0.1Check price
Westinghouse WGen75007,5009,500GasConventional$750$0.1Check price
Predator Predator 130009,50013,000GasConventional$1,000$0.11Check price
Firman P080048,00010,000GasConventional$850$0.11Check price
Firman T075717,5009,400Dual-fuelConventional$800$0.11Check price
Generac GP65006,5008,125GasConventional$700$0.11Check price
Generac GP8000E8,00010,000GasConventional$900$0.11Check price
Pulsar PG100008,00010,000Dual-fuelConventional$900$0.11Check price
Westinghouse WGen9500DF9,50012,500Dual-fuelConventional$1,100$0.12Check price
Champion 100302 Dual Fuel7,5009,375Dual-fuelConventional$900$0.12Check price
A-iPower SUA12000E9,00012,000GasConventional$1,100$0.12Check price
DuroMax XP13000EH10,50013,000Dual-fuelConventional$1,300$0.12Check price
Westinghouse WGen12000DF12,00015,000Dual-fuelConventional$1,500$0.12Check price
DuroMax XP12000EH9,50012,000Dual-fuelConventional$1,200$0.13Check price
DuroMax XP15000EH12,00015,000Dual-fuelConventional$1,700$0.14Check price
Champion 201158 Dual Fuel9,37512,500Dual-fuelConventional$1,400$0.15Check price
Champion 100891 Dual Fuel7,2509,200Dual-fuelConventional$1,100$0.15Check price
DuroMax XP11000iH9,00011,000Dual-fuelInverter$1,500$0.17Check price
WEN 56380i3,4003,800GasInverter$600$0.18Check price
WEN 56235i1,9002,350GasInverter$400$0.21Check price
Westinghouse iGen11000DF9,00011,000Dual-fuelInverter$2,000$0.22Check price
Firman WH032422,9003,200Dual-fuelInverter$700$0.24Check price
Westinghouse iGen45003,7004,500GasInverter$900$0.24Check price
Champion 8500W Dual Fuel Inverter6,5008,500Dual-fuelInverter$1,600$0.25Check price
Westinghouse iGen25002,2002,500GasInverter$550$0.25Check price
Pulsar G2319N1,6002,300GasInverter$400$0.25Check price
DuroMax XP2300i1,8002,300GasInverter$450$0.25Check price
Predator 3500 Inverter3,0003,500GasInverter$800$0.27Check price
A-iPower SUA2000iV1,6002,000GasInverter$450$0.28Check price
Champion 4500W Inverter3,5004,500GasInverter$1,000$0.29Check price
Champion 4250 Dual Fuel Inverter3,5004,250Dual-fuelInverter$1,000$0.29Check price
Generac GP2200i1,7002,200GasInverter$500$0.29Check price
Westinghouse iGen4500DF3,7004,500Dual-fuelInverter$1,100$0.3Check price
Champion 2500W Inverter1,8502,500GasInverter$550$0.3Check price
Generac iQ35003,0003,500GasInverter$900$0.3Check price
Honda EU2200i1,8002,200GasInverter$1,200$0.67Check price
Honda EU7000iS5,5007,000GasInverter$4,500$0.82Check price
Honda EU3000iS2,8003,000GasInverter$2,300$0.82Check price
How the ranking works. The metric is cost per 100 running watts (price divided by running watts, times 100), lower is better value. Size by running watts, the continuous power, not the higher peak figure, which is only a brief surge for motors starting. Type matters: inverter generators cost more per watt but give clean, quiet, fuel-sipping power safe for electronics; conventional open-frame units give far more watts per dollar for tools, pumps and rough backup. Filter to one type, and the lowest cost per watt in that group is highlighted. Dual-fuel adds propane, which stores for years, handy for emergencies. Prices are USD, converted live; fuel and running costs are not included.

Common questions

How many watts do I need?

Add the running watts of what you power at once. Fridge, lights and phones: ~2,000. Add a window AC or sump pump: 3,500-5,000. Most of a house: 7,500-10,000. Size by running watts and leave headroom.

Running vs starting watts?

Running (rated) watts is continuous power and the number to size by. Starting (peak/surge) watts is a brief burst for motors kicking on. We rank by cost per running watt, the honest continuous capacity.

Inverter or conventional?

Inverter: cleaner, quieter, fuel-sipping, electronics-safe, but pricier per watt. Conventional: far more watts per dollar for tools and rough backup. Compare within one type.

Is dual-fuel worth it?

For backup, usually. Propane stores for years unlike petrol, so dual-fuel is more reliable for unpredictable emergencies, for a small price premium.

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