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Electrical Discussion of preventative/corrective maintenance and other technical issues regarding your coach's electrical system.

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  #1  
Old 02-17-2008
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ajgibb ajgibb is offline
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Join Date: Dec 2007
Location: Elgin Illinois
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Default Onan Opus?

Hi guys,
Can anyone educate me about the Onan Opus converters I have on my SP? I can't find a thing about them on the internet or in searching on the BB forums. According to the data plate the output is 12 volts. On the data plate there is an asterisk note to the effect that there is 1 (one) amp "available" for battery charging. According to my BB book there are two 45 amp chargers but a charger has to have greater than 12 volts output and to charge a big battery bank more than one amp would be needed. So what do I have, DC power supplys or battery chargers?
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'91 SP 36
Suburban Toad
Elgin, Il

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  #2  
Old 02-18-2008
Lodgerhead Lodgerhead is offline
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Austin, I have them on my 1990 SP also, and can't find any any info on them either. My main question is if they have any further "intelligence" than the older battery boilers. I have it on my wish list now to replace them with a modern charger sometime this year. I don't think my batteries last like they should, just had one go bad last month. I think it's from overcharging.
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1990 36SP
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  #3  
Old 02-18-2008
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Dave,
That is why I'm trying to find out. I am afraid they might have damaged the new house AGMs I installed. I want to get a "smart" charger for the AGMs but I also want to be able to "smart" charge the crank batteries, which are low maintenance lead-acid. I'm thinking I'll just have a stand alone smart charger I'll carry to use for the crank batteries. I would like something more built-in for the house bank.
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'91 SP 36
Suburban Toad
Elgin, Il

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  #4  
Old 02-18-2008
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I've heard Iota makes some good chargers -- See
http://www.iotaengineering.com/ppguide.htm to pick out a product, then Google the specific model you like to search for a good price.
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