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Old 05-14-2013, 07:06 PM   #11
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Just bought a Champion 3500/4000 generator with an RV plug last week. Runs my AC with no problems. Wasn't to worried about noise and it is not that loud (but I am sure louder than an inverter genny). For my purpose it works great.

Plus it was on sale for $249

http://www.farmandfleet.com/products...l#.UZLC2lYo7qA
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Old 05-14-2013, 07:08 PM   #12
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Originally Posted by mikegp1 View Post
I saw one at Lowes. I believe it was a champion. 4kw with a 30amp Rv outlet. Doing simple math would power ac. It says 68db which is not more then a Honda.
I think you will find 68db very loud.Honda is around 53db.
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Old 05-14-2013, 07:13 PM   #13
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Sound DOUBLES every 6db. So 68dB is more than 4 times as loud as 53dB.
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Old 05-14-2013, 07:35 PM   #14
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Sound DOUBLES every 6db. So 68dB is more than 4 times as loud as 53dB.
Power doubles every 3dB. Not sure what "sound" is.
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Old 05-14-2013, 07:40 PM   #15
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It's about as loud as a normal conversation from about 3 feet away from the other person.
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Old 05-14-2013, 08:36 PM   #16
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Unfortunately I haven't heard a Red or Blue inverter genny run so I have no basis for comparison and do not have a loudness meter but I will tell you what I know about the Champion I just purchased. It is actually quiter than my lawn mower, I had it running about 8 feet from me while having a conversation with someone this weekend and neither of us had to yell at all (normal conversation.) I wont use it very frequently and I spent under $300 for the genny and wheel kit vs. spending over $2k for a red or blue that would power my 15k AC and other 110 items with no issues. If I had the extra $1700+ to spend I would do the same thing and then purchase a lot of mods and other items for the camper, go on a nice trip, or spend it on my kids.

Yes it is also a little heavier than a 2k red or blue, but the wheel kit is nice and I have no issues lifting it into and out of the truck bed myself.

Again these were for my situation and everyone will be different. If you are looking to spend $400 or less and want to power AC as well as other items it will be tough to find an inverter genny, but not impossible, and you will need to buy used.

You can find a Boily for ~$1k but that is still more than $400.
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Old 05-14-2013, 09:37 PM   #17
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Originally Posted by BarryD0706 View Post
Power doubles every 3dB. Not sure what "sound" is.
Sound level is commonly used as a short version for sound pressure level.

Lp = 10 log( p2 / pref2 ) = 10 log( p / pref )2 = 20 log ( p / pref ) (1)

where

Lp = sound pressure level (dB)

p = sound pressure (Pa)

pref = 2 10-5 - reference sound pressure (Pa)

If the pressure is doubled, the sound pressure level is increased with 6 dB (20 log (2)).

So with every 6 dB the sound pressure double and it is twice as loud to our ears.

Power is irrelevant in this context.
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Old 05-14-2013, 10:09 PM   #18
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Well stated Garbonz, a 68dB genny is noisy at any distance in a campground; now if you are on the side of a mountain and miles away from anyone that's different.
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Old 05-14-2013, 10:22 PM   #19
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Then I suggest you don't camp next to a 68db generator. Thanks for the link, mine is on the way, for the maybe 2 times I will use it, I suggest you don't park next to my hauler, cause over the 300 dirt bikes and quads or sprint cars you may hear my genny!!! Hahahaha. If you want to camp in complete whisper silence, sleep in a tent with no AC, TV, or furnace
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Old 05-14-2013, 10:29 PM   #20
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That's the other point. The "perceived noise level" is dependent on where you are and what you are doing. At night in a quiet campground. Even 53 dB is annoying at best
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