Car Forum / Driving, Maintenance, Tuning / RVs / September 2005
Sizing a generator
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dont.bother@ga.prestige.net - 22 Aug 2005 02:31 GMT Hi all,
We have a Gulfstream Innsbruck 28' TT. We usually don't dry camp, but then again.... So, I've been looking at generators. We use the AC, fridge, a portable electric cooler (2.5 amps), and typical lights. We almost never use the microwave, and if we use other high-amp appliances, I'm willing to turn off the AC to do so.
I'm interested in others' experience with portable generators. More specifically, how noisy is noisy? Do you really need one of the Honda/Yamaha super quiet models? Anybody found an easy way to shave a few decibels off of a conventional generator?
I've read about how to add up amps, but is that all there is to that? I suspect you don't want your generator max'ed out when the AC is on. How much headroom is enough?
I guess the bottom line is, if I'm gonna spend $1800 on a 3kw *quiet* generator, I want some reassurance that I didn't buy more than I need.
Thanks, Rick
Frank Tabor - 22 Aug 2005 02:40 GMT >Hi all, > [quoted text clipped - 18 lines] >Thanks, >Rick If you are going to run AC, then 3kw is barely enough. However, judicious use of your other appliances will allow you to use the AC. You won't be able to use much else. Run the reefer on gas.
 Signature Frank Tabor
William. Boyd - 22 Aug 2005 02:57 GMT > Hi all, > [quoted text clipped - 18 lines] > Thanks, > Rick With fuel prices the way they are going, I dont blame you for not wanting to over do it. I was in the delima about what to buy and considering the weight of the Honda 3500 watt unit compared with the. But I wound up with two EU2000i and a parallel kit. Why, I can lift one of these a lot easer than the big one. I can run only one with the echo throttle on and it will slow down to a speed only requiring for the amount of power draw. If I want to run the AC I do have to parallel both units.
 Signature
BILL P.
2004, 2500 SLT Quad Cab, Dodge Ram, SLT, SWB, 2WD, 5.9 HO Turbo Diesel, 48RE Auto Trans, Anti-Spin 3.73 Dif.Rhino Liner, Husky 16K. Voyager Controller 2005, 27RL Wildcat, DT/PC Wi-Fi. Dual EU2000i Hondas Just Me and Dog
RAM^3 - 22 Aug 2005 03:14 GMT > Hi all, > [quoted text clipped - 18 lines] > Thanks, > Rick If you're wanting to save money, have an easier time setting up, and have more generating capacity - all at the same time - get 2 Honda EU2000s + the parallelling cable.
That A/C, by itself, may require virtually all of an EU3000's output and leave little surplus to run anything else. The pair of EU2000s will supply 4KW vs. the EU3000's 3KW.
A pair of EU2000s weighs significantly less (and may require less space) than a single EU3000.
A pair of EU2000s will cost less than a single EU3000.
One thing you DON'T want to do is to get a "contractor" generator - unless you *enjoy* making enemies. <G>
William. Boyd - 22 Aug 2005 03:51 GMT >>Hi all, >> [quoted text clipped - 22 lines] > more generating capacity - all at the same time - get 2 Honda EU2000s + the > parallelling cable. The term "Parallel Cable" is not quite correct you will need the Parallel *Kit*, but if you want to make the same mistake I made I have a pair of parallel cables I'll sell cheap. The Kit is not cheap either.
> That A/C, by itself, may require virtually all of an EU3000's output and > leave little surplus to run anything else. The pair of EU2000s will supply [quoted text clipped - 7 lines] > One thing you DON'T want to do is to get a "contractor" generator - unless > you *enjoy* making enemies. <G>
 Signature BILL P.
2004, 2500 SLT Quad Cab, Dodge Ram, SLT, SWB, 2WD, 5.9 HO Turbo Diesel, 48RE Auto Trans, Anti-Spin 3.73 Dif.Rhino Liner, Husky 16K. Voyager Controller 2005, 27RL Wildcat, DT/PC Wi-Fi. Dual EU2000i Hondas Just Me and Dog
Malobenski - 22 Aug 2005 04:53 GMT >Anybody found an easy way to shave a >few decibels off of a conventional generator? Yeah leave it at home!
Norman Webb - 22 Aug 2005 09:34 GMT dont.bother@ga.prestige.net wrote in message <1maig1dig32a2eoupd8om6041nl99epq37@4ax.com>...
>Hi all, > [quoted text clipped - 18 lines] >Thanks, >Rick Startup current for electric motors greatly exceeds their run current. I was running a 70w bar fridge on a 750w peak generator and every time the fridge started the generator would really grunt.
Pumper Hinkle - 26 Aug 2005 06:19 GMT My Honda SX5000i will run the a/c and everything else but it does make a bit of noise. I leave it inside the camper shell with the exhaust directed out the back and that keeps the neighbors happier. Unless they happen to be outside. I have been thinking about building a sound dampening box for it. I got the 5000 because it will run the a/c without straining but I don't run the Mr. Coffee at the same time.
On the other hand, my EU2000 is very quiet. It is quite nice for charging up the batteries and running the tv but the Mr. Coffee is about all it can really handle (1750w). Forget about the a/c. I've thought about getting a second 2000 and the parallel kit for them but the fuel consumption would mean going outside and refueling both every 3-4 hours on full load. About 16 gallons per 24 hours. And the cost for the 2nd 2000 and the parallel kit is too close to what I can get a 3000 for.
I have read that the Honda EU3000 will run most rooftop a/c units (but probably nothing else at the same time). They are quiet, like the EU2000 (I've heard one), have a fuel capacity of 3.4 gals, and a run time at full output of 7.2 hours (according to Honda). That will just about give you a full nights sleep in the truck stop with the a/c running. If I were full-timing, I believe I would invest in the EU3000 and mount it in the truck bed. Another consideration of generators is: spare containers of gasoline. To run a generator 24 hours you will need a couple of 5-gallon containers of gasoline standing by. You don't want to refuel them while operating. I like the metal "safety cans" for dispensing gasoline and I ground the can to the generator and the ground.
Hope this helps.
Ralph
tat-2 - 29 Aug 2005 01:05 GMT What ever you do skip the $400 Coleman pulse 1850. It is loud. Spen the extra $$ and get a honda EU2000 or EU1000. Long after the price is forgotten the quality will remain. If you do decide you want to go the cheap route, please let me know and I will sell you mine for $200.
BTW: Onan makes a quiet and reliable generator but it must be installed on to your trailer/RV.
Ed
> Hi all, > [quoted text clipped - 18 lines] > Thanks, > Rick loupark@hotmail.com - 30 Aug 2005 02:13 GMT With the honda 3500 you will be able to run your home fridge during a power outage. May sound strange but thats when you know it was worth the extra $$$$
Hunter - 30 Aug 2005 04:05 GMT >With the honda 3500 you will be able to run your home fridge during a >power outage. May sound strange but thats when you know it was worth >the extra $$$$ How many watts is your home fridge?
Hunter --
http://members.aol.com/hhamp5246/roadtrip2005.htm
Life's journey is not to arrive at the grave safely in a well-preserved body, but rather to skid in sideways, totally worn out, shouting "...holy sh.t...what a ride!"
loupark@hotmail.com - 30 Aug 2005 12:27 GMT It takes a minimum of 2400 when it kicks in.
HD in NY - 31 Aug 2005 02:40 GMT > It takes a minimum of 2400 when it kicks in. Our EU1000i runs our home fridge. Have to turn off the econo setting but it runs it. HD in NY
loupark@hotmail.com - 31 Aug 2005 23:50 GMT How quiet?
HD in NY - 01 Sep 2005 01:04 GMT > How quiet? You can stand over while it's running and have a conversation in normal tones. HD in NY who would buy an EU2000i instead now
Jim Redelfs - 01 Sep 2005 04:20 GMT > > How quiet?
> You can stand over while it's running and have a > conversation in normal tones. > HD in NY who would buy an EU2000i instead now You are correct. While under FULL LOAD (1600 watts), I have held a "normal" conversation standing next to my EU2000i.
There is no denying the premium that is paid for the name "Honda" but one can't deny there is a LOT of R&D that made such a machine possible and "affordable".
I think it is GREAT that Yamaha is in competition for the sales of this type of ultra-quiet genset. That will discourage the prices from inflating too quickly.
:) JR
Mickey - 01 Sep 2005 17:32 GMT >>>How quiet? > [quoted text clipped - 15 lines] > :) > JR Son recently bought a 2.8kw Yamaha. It's about as large as he can manage getting out to the truck and still operate the A.C. If trailer battery is low the genset can't handle the A.C. and charge at the same time. As for quite, not nearly as quiet as I would have thought or son would like. You have no problem knowing the genset is running from 20-30 ft away. Also when low load and engine is idling, it isn't smooth but that may be something the dealer can address.
Mickey
Jim Redelfs - 02 Sep 2005 03:06 GMT > Son recently bought a 2.8kw Yamaha...As for quite, not nearly as > quiet as I would have thought or son would like. That is not surprising as that model is not a particularly quiet model, per se. The quiet model that produces 500 fewer watts is about the same price.
http://www.yamahagenerators.com/ef2800specs.htm?cart=11256253919229666
That's 2500 watts for $1160 but producing 60-67 dBA of noise.
http://www.yamahagenerators.com/EF2400iS_details.htm?cart=11256253919229666
That's 2000 watts for $1125 but at a MUCH quieter 53-58 dBA.
I believe that much of the quieting done by the ultra-quiet models is in their enclosure. You can have a GREAT exhaust muffler yet produce almost as much noise with the exposed machinery.
Noise - or lack of it - was my main criteria when I made my purchase. I prefer a relatively secluded camping experience which usually does NOT provide for an electric hookup. This requirement implies that, if there are other campers in the area, they too prefer a QUIET experience. Given that, it was foremost on my mind to NOT disturb others with the noise of a generator.
My biggest decision was whether to buy a portable genset that I could muster out of the pickup bed by myself that could NOT run the air conditioner or one that could, but would require TWO to haul it around.
I chose the former. If it is so hot that I cannot camp without a/c, my choices are now simple: Find a hookup or stay home.
I run my little Honda EU2000i probably no more than two hours/day.
http://www.hondapowerequipment.com/eu2000.htm
This warms my coffee, makes my toast and keeps the battery charged. It's a reasonable assumption that, if operating an air conditioner using a genset, it would run ALL DAY. That would not make neighbors happy, to say the least.
:) JR
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