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Car Forum / Driving, Maintenance, Tuning / RVs / September 2005

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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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