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Generators & Electric Motors General Discussion Antique Generators and Old Electric Motors: Questions and answers about restoring and showing old power generation systems.

Generators & Electric Motors General Discussion

Generator Noise Elimination


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  #1  
Old 07-18-2019, 12:28:43 PM
pigpen60 pigpen60 is offline
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Default Generator Noise Elimination

I'm looking for ideas to quiet a generator. When I camp at the thresher show they do not permit generators and you cant use your AC on their power. Group did last year and blew the transformer. Ideas?
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  #2  
Old 07-18-2019, 12:43:34 PM
Power Power is online now
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Default Re: Generator noise elimination

Start with a quiet unit, like the Honda inverter gens.

If the thresher show does not permit generators, how can you use yours?
You know no matter how quiet it is, someone will rat you out and say he is using a generator, so I can use mine. Soon, a cacophony of cheap noisy generators will be heard, and once again, ALL will be banned.
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Old 07-18-2019, 01:10:07 PM
Birken Vogt Birken Vogt is offline
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Default Re: Generator noise elimination

Honda inverter generators bark like anything else when they are running full load. But maybe the AC is not a full load, who knows. There have been generator quieting boxes made that look impressive but you would want to make sure all the hot air is leaving and not getting recycled.
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Old 07-18-2019, 01:46:22 PM
Vanman Vanman is online now
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Default Re: Generator noise elimination

If it's also an antique gas and steam engine show, how about setting up an electric plant for display?

Keith
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Old 07-18-2019, 03:38:39 PM
gdstew gdstew is offline
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Default Re: Generator noise elimination

100 yard extension cord! The B & S type 3600rpm "contractor" generators just weren't made to be quiet.
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Old 07-18-2019, 07:03:20 PM
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John Newman, Jr. John Newman, Jr. is offline
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Default Re: Generator noise elimination

Saw a lady that had a coffee shop on wheels in a trailer and had a generator in the bed of her pick-up. Genny was in a quiet box made for the purpose. Had an exhaust fan like on a restaurant on top and baffles to keep noise from having a direct path out. Had a 10KW 3600RPM unit in it.
It was very quiet.
I did notice that the exhaust / muffler was right outside an intake grille.. I'd have moved that, I think...
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Old 07-18-2019, 08:13:39 PM
pegasuspinto pegasuspinto is offline
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Default Re: Generator noise elimination

My semi educated guess is that it will take 1 average golf cart battery to run your AC 1 hour, on an inverter. Of course, you need them in pairs to get 12v. I'd say get 12 golf cart batts and you can survive quiet hours and have enough headroom to not strain the system. Don't forget you'll need a badass charger during the day.
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Old 07-18-2019, 09:40:05 PM
Frank DeWitt Frank DeWitt is offline
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Default Re: Generator noise elimination

Quote:
Originally Posted by pegasuspinto View Post
My semi educated guess is that it will take 1 average golf cart battery to run your AC 1 hour, on an inverter. Of course, you need them in pairs to get 12v. I'd say get 12 golf cart batts
You could do it with a lot less size and weight using Lithium batteries. One way is with recycled Nissan Lief batteries (and the required lithium charger). I helped do this for a friends power wheel chair. He gets about 5 times the range for the same size and less weight as lead acid.
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Old 07-18-2019, 10:15:55 PM
pegasuspinto pegasuspinto is offline
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Default Re: Generator noise elimination

That should work fine too, lead acid just has the the advantage of being a more familiar technology to people.
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Old 07-19-2019, 06:21:21 PM
pigpen60 pigpen60 is offline
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Default Re: Generator noise elimination

We had a fella next to us last year and he had a box made with 4-5" foam. Didnt hear anything from it or anyone. I tried to build one like it but I couldnt find that size foam so I sandwiched thinner foam. It fell apart in short order.

---------- Post added at 05:21:21 PM ---------- Previous post was at 05:20:00 PM ----------

Forgot to mention we are po folks. and this is a once a year thing for us.
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Old 07-20-2019, 05:41:40 PM
Mark Dieckmann Mark Dieckmann is offline
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Default Re: Generator noise elimination

Quote:
Originally Posted by Birken Vogt View Post
Honda inverter generators bark like anything else when they are running full load. But maybe the AC is not a full load, who knows. There have been generator quieting boxes made that look impressive but you would want to make sure all the hot air is leaving and not getting recycled.
Not sure I would say that they "bark like anything else" . Of course they do get somewhat louder but nothing at all like a screaming contractor genny. Most AC units are probably about 1/2 load or a bit more. Buy a Honda inverter. Mine is typically quieter than the AC.
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Old 07-20-2019, 06:39:06 PM
Thaumaturge Thaumaturge is offline
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Default Re: Generator noise elimination

Best bet is just a sound deflector. This is a square enclosure open at the top that sits around the generator and deflects sound upwards. Have friends who go off to star parties and music festivals who have told me this is device of choice for reducing generator noise. Can be made of 4 boards that latch together at corners for ease of transport.
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Old 07-21-2019, 06:02:26 PM
Joe Romas Joe Romas is offline
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Default Re: Generator noise elimination

Just got back from 2 weeks camping and I took 2 generators.
A Honda EU2000i and running my campers 7,150 BTU AC in mid 90's heat it DOES bark and my Boily 3000 watt unit. Watt for watt the larger one is quieter.
Bot the Boily has intake on one end and exhaust on the other that makes it impossible to direct the sound in one direction.
the Honda placed in a near by low area helped considerably.

A Honda eu3000si would be a better unit as far as noise goes but they all make noise.
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