Survivalism & Self Sufficiency Topics > The Gear and Tool Review Board

"small" generator question

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BLACK SHIRT:
I have a Briggs and Stratton 6500 watt. It has kept the lights on and pretty much everything going in our house during numerous outages.
It starts on second or third pull and runs great.

khristopher23:
I like the looks of the Honda. I'll probably go with the eu2000 when I pull the trigger. Like Fritz, I've considered the 3000, but 2 of the 2000's are about the same price, and you get 1000 more watts when you run them together, plus you have the ability to only run one (for less fuel consumption) when you only need one, easier portability as well. With all of that, I really don't see a reason to go up to the 3000 unless you wanted to hook 2 of those together to get 6000 watts.

bcksknr:
     Could someone explain the seemingly "low" wattage outputs of inverter generators? My main concern is being able to "spin up" my well pump motor. To do this I need about 7000w momentary to get the motor started. Once it gets going, the draw drops dramatically. I have a very noisy regular Generac 11 horse that will do it, but I'm thinking of something that doesn't wake up the whole neighborhood. Is the limit on inverter output related to the cost of large output inverters? Also, a gas engine is a gas engine. How do they keep the inverter generator units so quiet?

Smurf Hunter:

--- Quote from: bcksknr on June 29, 2016, 07:58:15 AM ---     Could someone explain the seemingly "low" wattage outputs of inverter generators? My main concern is being able to "spin up" my well pump motor. To do this I need about 7000w momentary to get the motor started. Once it gets going, the draw drops dramatically. I have a very noisy regular Generac 11 horse that will do it, but I'm thinking of something that doesn't wake up the whole neighborhood. Is the limit on inverter output related to the cost of large output inverters? Also, a gas engine is a gas engine. How do they keep the inverter generator units so quiet?

--- End quote ---

If I had that problem, I'd recharge a battery bank capable of a rapid discharge and just use a free standing inverter (assuming your pump is AC).
What we're really after here is a big current draw (amps) in a short amount of time - similar to cold cranking a car engine.

Carl:
Inverters just don't handle a startup load well ,unless they are way over rated for the wattage needed to start the device.
The inverter/generator is quieter when not under full load because it regulates the motor speed according to load needs and often the inverter will handle a brief 'spike' to start something...but not over the inverter rating as solid state electronics is just not 'over built' these days.

A typical 'contractor'  grade generator often does not have speed controls as it (the motor and generator) must produce 60 cycle power with engine/generator speed and most require a 3600 RPM to produce power and frequency,rather than the inverter/generator producing the voltage and frequency while the motor and generator only revs up for power level .

You might investigate a SOFT START KIT for your well,or think about above ground water storage for night time use as your generator will last a lot longer when not run 24 hours a day at what must be high cost for fuel and service (you do change the oil often?)

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