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

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Running the fridge on 120 v. Inverter Power ; whats the big deal ?!

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Dave in Lake Villa - 12 Oct 2005 23:47 GMT
Ive read a couple of posts of people denouncing this 'because it puts
too much strain on the engines Alternator'  ;  Ive also read of folks
doing this without ANY problems whatsoever, including myself .   There
are plenty of loads on the engine that draw some 15-20 amps of DC power
such as the a/c compressor,  blower motor on highest speed, and electric
radiator fans (where applicable) ;  just take a look at your fuse box
and youll see quite a few 15 and 20 amp fuses/breakers.  Most RV engines
alternators are at least 120 amp rated and can certainly handle an
Inverter powering a 1.7 amp @ 120 v.  or  17 amps DC .  

For those who still insist 'it puts a big drain on the engines
alternator (with engine running) '... id like you to show empirical
proof for such a statement. Thank you.
HeatMan - 13 Oct 2005 01:09 GMT
I can help you with that, you pedophilic moron.

In line, with breakups through the paragraphs.

> Ive read a couple of posts of people denouncing this 'because it puts
> too much strain on the engines Alternator'  ;  Ive also read of folks
> doing this without ANY problems whatsoever, including myself .   There
> are plenty of loads on the engine that draw some 15-20 amps of DC power
> such as the a/c compressor,  blower motor on highest speed, and electric
> radiator fans (where applicable) ;

The air conditioning compressor that is in the engine compartment is belt
driven, not electric.  Yes, it has a electrically operated clutch, but the
compressor itself is belt driven.  The roof top or basement air is 110 volt
powered, by the generator while driving and (usually) the CG power.  The
alternator is sized for the blower motor, the electric radiator fans and the
rest of the accessories.

 just take a look at your fuse box
> and youll see quite a few 15 and 20 amp fuses/breakers.  Most RV engines
> alternators are at least 120 amp rated and can certainly handle an
> Inverter powering a 1.7 amp @ 120 v.  or  17 amps DC .

I don't exactly remember the conversion to go from 12vDC to 110vAC, but it's
pretty high.  Even you should know that a hermetic compressor draws 2x to 3x
running amps at startup.  Most inverters won't handle that kind of a load.
If the alternator on the engine is rated at 120amps DC and the load
requirements are more than that, the battery will start suppling that power,
but it may not last long.

> For those who still insist 'it puts a big drain on the engines
> alternator (with engine running) '... id like you to show empirical
> proof for such a statement. Thank you.

Even though it's 8PM where I am, I'm beat.  I am not going to spend 15-20
minutes researching somehting like that when I can be doing something that
is fun.  Besides, I took a break from bids and invoicing the check the NG's.

Okay?
oso-miguel - 13 Oct 2005 02:20 GMT
>I can help you with that, you pedophilic moron.
>
[quoted text clipped - 39 lines]
> is fun.  Besides, I took a break from bids and invoicing the check the
> NG's.

Before you call others "pedophilic morons", consider this:
An RV refrigerator does NOT have a compressor. It works on the absorption
principle, see:
http://www.solarmirror.com/www_jul01/fridge.html
My 3 way ref. uses 17 amps when running on a 12V power source.

Miguel
Rich256 - 13 Oct 2005 02:58 GMT
> >I can help you with that, you pedophilic moron.
> >
[quoted text clipped - 47 lines]
>
> Miguel

And the ref. probably does not cool as good as with 110.  The 12 volt heater
is usually a lower wattage.  Therefore if you try running the 110 heater
through an inverter you may well draw well over 17 amperes.
oso-miguel - 13 Oct 2005 05:35 GMT
>> An RV refrigerator does NOT have a compressor. It works on the absorption
>> principle, see:
[quoted text clipped - 7 lines]
> is usually a lower wattage.  Therefore if you try running the 110 heater
> through an inverter you may well draw well over 17 amperes.

12 X 17 = 204 watts.  Th ref. uses 325 watts at 110V.  325 divided by 110  =
2.95 amps
Miguel
HD in NY - 13 Oct 2005 18:57 GMT
snipped
> 12 X 17 = 204 watts.  Th ref. uses 325 watts at 110V.  325 divided by 110  =
> 2.95 amps
> Miguel

325/12=27 amps. Plus the inverter has a loss which will
increase the 12v draw even more.
Hugh
oso-miguel - 13 Oct 2005 21:08 GMT
> snipped
>> 12 X 17 = 204 watts.  Th ref. uses 325 watts at 110V.  325 divided by 110
[quoted text clipped - 3 lines]
> draw even more.
> Hugh

Voltage times amps equals watts.
Therefore, watts *divided* by voltage equals amps.

Miguel
Rich256 - 13 Oct 2005 21:36 GMT
> > snipped
> >> 12 X 17 = 204 watts.  Th ref. uses 325 watts at 110V.  325 divided by 110
[quoted text clipped - 8 lines]
>
> Miguel

The statement was that his refrigerator drew 17 amperes using the 12 volt
heater.  I said that 12 volt heaters usually are small compared to the 110.
Your statement that the heater is 325 watts confirms that.  So using an
inverter to drive the 110 will require at least 27 amps at 12 volts.  More
because an inverter is not 100% efficient.

But cooling will be better.
HD in NY - 13 Oct 2005 23:34 GMT
>>>snipped
>>>
[quoted text clipped - 21 lines]
>
> But cooling will be better.

I'm beginning to think he just wants to flap his lips. It
should have been obvious to him I knew what I was talking
about <g>.
Hugh wondering who Mig is arguing with and why
Flakey714@aol.com - 13 Oct 2005 03:38 GMT
The reason why dave is labeled a "pedophilic moron"

This from inside the webtv firewall when he was using a different webtv
nic:

From: Daveinlllinois @webtv.net
Group: alt.discuss.clubs.public.christian.gays
Subject: im looking for a friend
Date: Mon, Jan 26, 2004, 6:13pm (PST+2)
Organization: WebTV Subscriber

im a single male no children but did lose one to God many years ago im
a
christian but have recently found myself fighting with homesexual
demons
in my mind i am around children often and worry about my feelings for
them too id like someone other than my minister to discuss this
situation with

(As to the moron part...that's self-evident after getting to know this
fundy trolling POS)
HeatMan - 13 Oct 2005 11:48 GMT
> >I can help you with that, you pedophilic moron.
> >
[quoted text clipped - 41 lines]
>
> Before you call others "pedophilic morons", consider this:

Coupla points here.  Dave is a pedophile.  He also claims to be in the
HVAC/R industry.  If he is actually in the HVAC/R industry, he should know
this stuff.  (He was talking about a hermetic system, not a standard RV
ammonia system)

> An RV refrigerator does NOT have a compressor. It works on the absorption
> principle, see:
> http://www.solarmirror.com/www_jul01/fridge.html
> My 3 way ref. uses 17 amps when running on a 12V power source.
>
> Miguel
Dave in Lake Villa - 13 Oct 2005 12:41 GMT
'Coupla points here. Dave is a pedophile. He also claims to be in the
HVAC/R industry. If he is actually in the HVAC/R industry, he should
know this stuff. (He was talking about a hermetic system, not a standard
RV ammonia system)'

Reply:  Trying to backstroke out now ?   I have an RV and im posting in
an RV newsgroup , and the post is about using an Inverter to power an
'RV FRIDGE' s  110 v. heaters,  instead of using propane on an Absorber
Fridge .
Go back to alt.hvac  where you can flame others, stalk others, and
continue to spread dissension to Homeowners and other HVAC techs that
tell  you where to get off regarding your typical attitude that is
hurting the HVAC industry.
HeatMan - 13 Oct 2005 16:14 GMT
> 'Coupla points here. Dave is a pedophile. He also claims to be in the
> HVAC/R industry. If he is actually in the HVAC/R industry, he should
[quoted text clipped - 9 lines]
> tell  you where to get off regarding your typical attitude that is
> hurting the HVAC industry.

Get a grip Dave.  I'm not a homeowner tormentor in alt.HVAC.  I answer
questions for anyone if I know the answer.  Do a google search and show me
where I've flamed people.  Prove it.

I also am a RV owner and have been for several years.  I've been camping all
my life, but we moved into an RV because of my wife's back problem.

Dave, several time I (and others) have asked you to prove to us that you are
in the industry.  You never have.  One gent (yes, he does a bit of homeowner
flaming) even looked into Illinois to see if you were certified.  He asked
you questions and (as I recall) you couldn't answer.  Put up or shut up.

If you remember, you're the one that mentioned something like "homosexual
demons about customers male children."   I have a son and that scares me.
Dave in Lake Villa - 13 Oct 2005 12:23 GMT
'Before you call others "pedophilic morons", consider this: An RV
refrigerator does NOT have a compressor. It works on the absorption
principle, see:
http://www.solarmirror.com/www_jul01/fridge.html My 3 way ref. uses 17
amps when running on a 12V power source.
Miguel'

Reply:  Bingo Miguel !   Ive been suggesting that HeatMan get out of the
HVAC trade for some time now ;  he is a discredit to the trade with his
bad attitude, filthy language, and knowledge incompetence.  
HeatMan - 13 Oct 2005 16:03 GMT
Put up or shut up.

> 'Before you call others "pedophilic morons", consider this: An RV
> refrigerator does NOT have a compressor. It works on the absorption
[quoted text clipped - 6 lines]
> HVAC trade for some time now ;  he is a discredit to the trade with his
> bad attitude, filthy language, and knowledge incompetence.

Get a clue, Dave.  I don't use filthy language and I am very competent.  I
do have a bad attitude towards people like you.

You have never suggested that I get out of the trade, but many people have
asked you to put up or shut up.  Show us your credentials.  As soon as that
happens AND you make apologies for the pedophilic leanings, I'll look at you
differently.

Put up or shut up.
Flakey714@aol.com - 13 Oct 2005 19:42 GMT
Well I have NO problem with "filthy language"

GO f.ck YOURSELF DAVE

YA UNEDUCATED TROLLING ANTI-SEX FUNDY PIECE OF sh.t

IF IT WASN'T FOR BAD ADVICE, YOU WOULD HAVE NEVER GIVEN ANY

POAD
HeatMan - 14 Oct 2005 19:07 GMT
Maybe in Wednesday, Thursday possibly, I responded to Dave in Lake Villa
about some things he said.   He never responded.

I just want people to know about Dave.  He appeared on the alt.hvac and
alt.homerepair NG's and started giving out bad advice.  The kind of advice
that might get people hurt or even killed.  One gent on the HVAC group did a
little research and found out about his pedophilic tendencies.  Since then
we've been trying to inform people about him.
RVer Don - 13 Oct 2005 06:54 GMT
> For those who still insist 'it puts a big drain on the engines
> alternator (with engine running) '... id like you to show empirical
> proof for such a statement. Thank you.

I haven't a clue as to whether there are any problems with operating your
refer with an inverter and could care less.  I have a refer, as almost all
RV's do, that operates on propane.  I fail to understand why anyone would
want to use an inverter when they work quite well on propane which is what
they are designed to do.

Don
Dave in Lake Villa - 13 Oct 2005 12:34 GMT
'I haven't a clue as to whether there are any problems with operating
your refer with an inverter and could care less. '

Reply: Then you shouldnt have answered this post if you are a
could-care-less individual.

'I have a refer, as almost all RV's do, that operates on propane. I fail
to understand why anyone would want to use an inverter when they work
quite well on propane which is what they are designed to do.
Don'

Reply:  1.  No chance of a fire from a (partially) open burner flame.
2.  No worry about the small flame blowing out  while travelling due to
wind turbulence in partially open burner compartment.  3.  No
maintenance to the burner, orifice, or generator sections flue from
continuous use of the propane.  4. Conservation of propane gas . 5. Can
avoid potential propane leaks that may be present in the propane piping
that runs underneath the RV to all gas appliances , by keeping the
propane tank shut off . 6. Some people prefer going 'all electric' when
the opportunity presents itself.
HeatMan - 13 Oct 2005 16:07 GMT
> 'I haven't a clue as to whether there are any problems with operating
> your refer with an inverter and could care less. '
[quoted text clipped - 8 lines]
>
> Reply:  1.  No chance of a fire from a (partially) open burner flame.

Good point.

> 2.  No worry about the small flame blowing out  while travelling due to
> wind turbulence in partially open burner compartment.

The refrigerator on my camper is an electronic ignition for the absorbtion
system.

> 3.  No
> maintenance to the burner, orifice, or generator sections flue from
> continuous use of the propane.

Every mechanical item needs some kind of maintenance.

> 4. Conservation of propane gas .

Good point, but propane is cheap.

> 5. Can
> avoid potential propane leaks that may be present in the propane piping
> that runs underneath the RV to all gas appliances , by keeping the
> propane tank shut off .

If your piping leaks, what happens when you turn it on at a CG?  At least
when you're driving, the gas will dissapate.

> 6. Some people prefer going 'all electric' when
> the opportunity presents itself.

Can argue there.
 
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