Generators ?

What is the best fuel for a generator? And how do you know what wattage you need?

7 Answers

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  • Steven
    Lv 7
    1 month ago

    Gas, diesel, propane and natural gas all have different  cost and convenience, and pollution (stink) depending on your situation.

    You need to add up the power needs of  the appliances you need to run. If you have no idea what your appliances draw, you need to do some research which is easy, just look them up on the internet and/or check for labels on the back. If you avoid using an electric range or drier then your needs are modest. Anything that heats is not a great use of electricity.

  • Jim
    Lv 7
    1 month ago

    My generator is Dual-Fuel and can use Gasoline or Propane or Natural Gas. So it all depends on what you want to use. Wattage: add up what you want to run (e.g. 14,000w to run home a/c). Normal inverter 2200w is the typical minimum. The Honda EU2200I is the gold standard, but it can be converted to tri-fuel for about $150.

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  • qrk
    Lv 7
    1 month ago

    Best fuel depends on what the generator is used for.

    If it's for emergency backup of critical systems, natural gas or propane as the fuel doesn't go bad over time.

    For big systems (over 50 kW), natural gas or diesel.

    For little home systems, gasoline. However, the tainted crap (10% ethanol) sold at the gas pumps can clog the carburetor if left standing for a few months. For storage, the generator gas tank needs to be emptied and run the system until all the gas is used up. It's also helpful to use a fuel stabilizer like Sta-Bil for ethanol tainted fuel stored in gas cans. Replace stored gasoline every 6 months. If you can get real gasoline, that would be best as it has a much longer shelf life than the junky stuff. Real gasoline can be bought at marinas and some stations that cater to racing.

  • 1 month ago

    Wattage is determined by the needs of the system to be powered.  Presumably, you would want a wattage output that can satisfy the demands of the system when at its maximum use, plus some contingency for future changes and punctual excess demands (some things draw more than nominal use at start-up, for example).  You would have to add up the wattage of all the items being served by the generator to decide your needs.

    Fuel is generally not a major deciding point in terms of effectiveness.  It is more one of supply needs and availability and cost per unit output. Sort of like asking what is the best heating system for a house.

  • 1 month ago

    do you mean motor-generator, as generators do not use fuel ?

    depends on the type of motor... there are gas, gasoline, diesel types, each different. Use whatever is specified for the set. 

    wattage, depends on what you will connect to the generator. Whole house, or just a few vital appliances? List the appliances and lights and the wattages of each and add.

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