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| Re: [GMCnet] Fw: Fridge Mod - My Photo Gallery [message #220618 is a reply to message #220574] |
Sat, 31 August 2013 08:54   |
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Matt Colie
Messages: 8547
Registered: March 2007
Location: S.E. Michigan
Karma: 7
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Senior Member |
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[quote title=A Hamilto wrote on Fri, 30 August 2013 21:21]| Kosier wrote on Fri, 30 August 2013 16:42 |
Okay, here'€™s the modified power unit for the Norcold all electric.
Any of my gibberish you don'€™t understand, just ask.
Gary Kosier
77 PB w/Cad500
Newark, Oh
What if you run the inverter off the converter full time and eliminate the DPDT relay? When you are on battery power, the + from the converter comes from the battery. When you are on shore power, the converter runs off AC power.
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A,
That is a very good question and I am sure that Gary considered it. The answer is simple but obtuse...
If one is running the APU to recharge the house bank (a common thing for those of us with electric refrigeration) you need all that the converter/charger can do to be going to the house bank. On the other hand, almost no matter what you are doing there is additional APU capacity that can be utilized. At least, that has been my thinking....
Matt
Matt & Mary Colie - Chaumière -'73 Glacier 23 - Members GMCMI, GMCGL, GMCES
Electronically Controlled Quiet Engine Cooling Fan with OE Rear Drum Brakes with Applied Control Arms
SE Michigan - Near DTW - Twixt A2 and Detroit
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| Re: [GMCnet] Fw: Fridge Mod - My Photo Gallery [message #220704 is a reply to message #220634] |
Sat, 31 August 2013 19:27 |
Ronald Pottol
Messages: 505
Registered: September 2012
Location: Redwood City, California
Karma: -2
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Senior Member |
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Are you sure your batteries can accept so much charge so fast? I'd expect
that while they do need 4 hours, they probably don't take even 2000 watts
for very long. I would not be surprised if there were no difference in
charging time.
On Aug 31, 2013 8:45 AM, "A." <markbb1@netzero.com> wrote:
>
>
> Matt Colie wrote on Sat, 31 August 2013 08:54
> > A,
> > That is a very good question and I am sure that Gary considered it. The
> answer is simple but obtuse...
> > If one is running the APU to recharge the house bank (a common thing for
> those of us with electric refrigeration) you need all that the
> converter/charger can do to be going to the house bank. On the other hand,
> almost no matter what you are doing there is additional APU capacity that
> can be utilized. At least, that has been my thinking....
> >
> > Matt
> I was only thinking battery and shore power options. It would take longer
> to charge the house battery if the fridge was sucking power from the
> converter while on APU power. If it takes 4 hours to charge the batteries
> without running the fridge, I estimate it would take an extra 25 minutes
> with the load of the fridge added.
> --
> '73 23' Sequoia For Camping
> '73 23' CanyonLands For Sale
> UA (Upper Alabama)
> "Time is money. If you use YOUR time, you get to keep YOUR money."
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>
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1973 26' GM outfitted
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| Re: [GMCnet] Fw: Fridge Mod - My Photo Gallery [message #220706 is a reply to message #220704] |
Sat, 31 August 2013 19:54 |
A Hamilto
Messages: 4508
Registered: April 2011
Karma: 39
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Senior Member |
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| Ronald Pottol wrote on Sat, 31 August 2013 19:27 |
Are you sure your batteries can accept so much charge so fast? I'd expect that while they do need 4 hours, they probably don't take even 2000 watts for very long. I would not be surprised if there were no difference in charging time.
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I don't understand the question. You can't throw 2000 watts at the house battery. The correct unit is amps, and my converter can supply 45 amps. The converter does not demand anywhere near what the Onan can provide, but running the Onan to power the converter is the assumption we made for this discussion.
Now if you are asking if the house battery can charge at a rate of 40 - 45 amps (full converter current), I don't know.
If you are asking if it takes 4 hours to charge the house battery when running the converter off the Onan, I don't know.
I was just throwing out numbers for examples.
IMHO, if it takes more than an hour or so to charge the house battery AT ALL, then you need a better way to do it than the Onan, unless you are running the Onan anyway to power the roof AC. If you're using the Onan just to charge the house battery, you need to consider acquiring a 1kW - 2kW generator for that and leaving the Onan for bigger loads.
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| Re: [GMCnet] Fw: Fridge Mod - My Photo Gallery [message #220709 is a reply to message #220706] |
Sat, 31 August 2013 20:02 |
Ronald Pottol
Messages: 505
Registered: September 2012
Location: Redwood City, California
Karma: -2
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Senior Member |
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That's what I was talking about, only other 12v loads would increase
charging time, you are only using 600 or so watts of you 6k or 4k of 120 ac.
On Aug 31, 2013 5:54 PM, "A." <markbb1@netzero.com> wrote:
>
>
> Ronald Pottol wrote on Sat, 31 August 2013 19:27
> > Are you sure your batteries can accept so much charge so fast? I'd
> expect that while they do need 4 hours, they probably don't take even 2000
> watts for very long. I would not be surprised if there were no difference
> in charging time.
> I don't understand the question. You can't throw 2000 watts at the house
> battery. The correct unit is amps, and my converter can supply 45 amps.
> The converter does not demand anywhere near what the Onan can provide, but
> running the Onan to power the converter is the assumption we made for this
> discussion.
>
> Now if you are asking if the house battery can charge at a rate of 40 - 45
> amps (full converter current), I don't know.
>
> If you are asking if it takes 4 hours to charge the house battery when
> running the converter off the Onan, I don't know.
>
> I was just throwing out numbers for examples.
>
> IMHO, if it takes more than an hour or so to charge the house battery AT
> ALL, then you need a better way to do it than the Onan, unless you are
> running the Onan anyway to power the roof AC. If you're using the Onan
> just to charge the house battery, you need to consider acquiring a 1kW -
> 2kW generator for that and leaving the Onan for bigger loads.
> --
> '73 23' Sequoia For Camping
> '73 23' CanyonLands For Sale
> UA (Upper Alabama)
> "Time is money. If you use YOUR time, you get to keep YOUR money."
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
1973 26' GM outfitted
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