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04-21-2007, 06:35 AM
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#1
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4 Rivet Member
1979 31' Excella 500
Detroit Area
, Michigan
Join Date: Jul 2004
Posts: 498
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Anybody know how many watts an old Univolt would draw (circa 1979 31' International?)
I'm wondering because I'm replacing with a 60A Intellipower that draws 1000 Watts on the input side. Wondering how they compare.
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04-21-2007, 07:16 AM
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#2
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Moderator Emeritus
1972 31' Sovereign
High Springs
, Florida
Join Date: May 2002
Posts: 2,311
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Probably about the same or more. The old Univolts used a ferro resonant transformer, and they generate a lot of heat, which equates to wasted energy. Intellipowers use solid state switching technology which is more efficient.
__________________
ARS WA8ZYT
2003 GMC 2500HD 4X4 D/A Ext. Cab
Propane Powered Honda EU2000i
Lots of Hot Sauce!
Air # 283
WBCCI 1350
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04-21-2007, 07:17 AM
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#3
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Rivet Master
1991 34' Excella
Princeton
, New Jersey
Join Date: Aug 2003
Posts: 7,070
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60 amps seams like a bit of over kill. What are you using at 12 volts that requires that kind of power?
__________________
WBCCI 12156 AIR 3144 WACHUNG TAC NJ6
2004 Excursion 4x4
1991 34 ft. Excella +220,000 miles, new laminated flooring, new upholstery, new 3200 lbs axles
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04-21-2007, 04:43 PM
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#4
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4 Rivet Member
1979 31' Excella 500
Detroit Area
, Michigan
Join Date: Jul 2004
Posts: 498
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I invertor is bought and paid for. Didn't want to be underpowered As an afterthought, I was worried that my requirements to power the invertor are going to be a lot more than the old one and I do boondock continously.
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04-21-2007, 07:31 PM
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#5
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Rivet Master
Commercial Member
Vintage Kin Owner
Naples
, Florida
Join Date: Dec 2005
Posts: 7,508
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Quote:
Originally Posted by wacnstac
I invertor is bought and paid for. Didn't want to be underpowered As an afterthought, I was worried that my requirements to power the invertor are going to be a lot more than the old one and I do boondock continously.
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Is that an 'inverter' or a 'converter'? Two very different animals.
__________________
lewster
Solar Tech Energy Systems, Inc.
Victron Solar Components and Inverters, Zamp Solar Panels, LiFeBlue and Battle Born Lithium Batteries, Lifeline AGM Batteries
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04-21-2007, 07:53 PM
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#6
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4 Rivet Member
1979 31' Excella 500
Detroit Area
, Michigan
Join Date: Jul 2004
Posts: 498
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Sorry meant to say convertor. So does anybody have an answer? I suppose when I pull the old one out it might be stamped somewhere with how many watts it draws. Perhaps the 60A might charge a drained battery a little faster which is good for me as this means less generator run time.
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04-21-2007, 08:19 PM
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#7
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Rivet Master
, Minnesota
Join Date: Aug 2003
Posts: 7,721
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The 60A charge rate is fine if you have an AGM battery. Might be OK if you have two wet cells.
I wouldn't use that high a rate if you have a gel battery.
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04-22-2007, 06:21 AM
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#8
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Rivet Master
Commercial Member
Vintage Kin Owner
Naples
, Florida
Join Date: Dec 2005
Posts: 7,508
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The higher amperage units will re-charge yuor batteries faster, but it's the voltage that's most important with the different types of batteries. I don't have the exact numbers off the top of my head, but a gel requires the lowest charge voltages, with wet cell in the middle and AGM needing the highest.
I would assume that most converters and battery chargers will provide a 'safe' voltage output so as not to ruin a battery with excessive charging voltage. There is a 'new breed' of charger where you select the type of battery during set-up, and this pre-determines the charging voltages used.
AGMs like to be charged at their higher recommended voltage (per Lifeline's website) in order to acieve maximum battery life.
__________________
lewster
Solar Tech Energy Systems, Inc.
Victron Solar Components and Inverters, Zamp Solar Panels, LiFeBlue and Battle Born Lithium Batteries, Lifeline AGM Batteries
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04-22-2007, 09:38 AM
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#9
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4 Rivet Member
1979 31' Excella 500
Detroit Area
, Michigan
Join Date: Jul 2004
Posts: 498
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I have a Lifeline AGM.
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04-22-2007, 10:17 AM
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#10
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4 Rivet Member
1981 25' Excella II
Dillon
, Colorado
Join Date: Jul 2006
Posts: 397
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I can't recall which thread, but someone on here did a comparison of the draw from his univolt to his inteli charger before, and after. He said the univolt put out between 5-6 amps, but never less then 5. By comparison the inteli charger went down to .6 after the batteries were charged. I don't know how that would relate to the W draw, but I would think it would be less.
Charlie
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04-22-2007, 06:10 PM
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#11
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Rivet Master
Commercial Member
Vintage Kin Owner
Naples
, Florida
Join Date: Dec 2005
Posts: 7,508
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Quote:
Originally Posted by wacnstac
I have a Lifeline AGM.
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Me too! Two GPL-4C 6VDC golf cart batteries replaced the 2 Interstate Group 24's. I switched out the Parrallax converter that came with the trailer to a WFCO 3-stage 55 amp unit. No problems to date.......but the real test is coming up in July when I'll be full-timing in the CCD for 3+ months!
I'll keep you posted..............................
__________________
lewster
Solar Tech Energy Systems, Inc.
Victron Solar Components and Inverters, Zamp Solar Panels, LiFeBlue and Battle Born Lithium Batteries, Lifeline AGM Batteries
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