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Old 08-30-2015, 01:20 PM   #1
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Converters

I think my Univolt is shot. Lots of AC ripple on the output. So I guess I am in the market for a new converter. So what will last well and not boil my battery. I see these posts about multiple stages which to me makes no sense. A properly regulated supply will maintain the voltage at the correct level regardless of power draw. When there is no load the voltage should not be so high as to overcharge the battery. I am sure the modern supplies are a switching power supply as opposed to the Univolt linear boat anchor. A switching supply is by definition electronically regulated and multiple stages should not apply.

Perry
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Old 08-30-2015, 01:31 PM   #2
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If you do not want to cook your battery, multistage chargers are the way to go. They also handle the concept of low charge rates when in storage.
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Old 08-30-2015, 01:35 PM   #3
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Perry, as you know, there are tons of threads with all the technical jargon available, so I won't repeat. Suffice it to say that a battery isn't like filling a bucket with water at a constant flow or pressure. A Batt has different "thirst"at various levels of full, temperatures, etc.

A 3 stage (minimum) doesn't cost that much more, and is so much better for battery life.
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Old 08-30-2015, 01:51 PM   #4
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Ya got some model numbers?

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Old 08-30-2015, 01:58 PM   #5
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I got this one about 5 years ago:

DLS-55 (55 Amp Power Converter w/IQ4)

Been happy with it and still have healthy Interstate group 29s, which I got at the same time.

Lewster doesn't like this one, as it doesn't compensate for temp and it has no serviceable parts....throw away.

You could call Randy at the above link...great guy...who will spend time with you and balance your needs with several offerings. He's very knowledgeable.
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Old 08-30-2015, 02:00 PM   #6
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Do some of them have a sensor lead that measures the battery temperature?

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Old 08-30-2015, 02:01 PM   #7
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Quote:
Originally Posted by perryg114 View Post
Do some of them have a sensor lead that measures the battery temperature?

Perry
Yes. PM lewster or call Randy, is the best advice I would give.
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Old 08-30-2015, 02:30 PM   #8
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Well anything has got to be better than what I have. The 3 year old battery died after 3 yrs of no maintenance but it could have been gone before now. Since I never operate anything unless I am hooked to the truck or plugged in, it is hard to tell the battery is shot. The only purpose it has now is as a voltage regulator and a noise filter and to actuate the brakes if the trailer come unhitched.

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Old 08-30-2015, 03:04 PM   #9
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Here is a reputable dealer with good support for multi-stage converter/chargers:

Powermax Boondocker Converters
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Old 08-31-2015, 12:36 PM   #10
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What amperage do I need? I was thinking 55 AMP would be plenty.

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Old 08-31-2015, 02:16 PM   #11
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I have been looking at the Power Max converters. Amazon has some older models they are selling and bestconverter.com says they will no longer be warranteed by the manufacture. The Boondocker PM4B-60 is the new model. Which is $160 plus about $15 shipping. Amazon has the older PM3-55 for $119 with free prime shipping. Supposedly there is no warrantee on it if bestconverter.com is correct.

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Old 08-31-2015, 02:29 PM   #12
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55 amp is what my OE Paralax (sp) was, so that's what I got with the Iota. It is plenty for my two group 29s.
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Old 09-01-2015, 11:01 AM   #13
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I called Power Max and they said they will warantee stuff bought on Amazon. They won't warantee something that came from an OEM purchase sold on Ebay or Craigs list etc. I am going to get the Powermax PM3-55.

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Old 09-08-2015, 02:02 PM   #14
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perryg114, does your Excella II have two batteries? I am probably in the market for a new converter for a 2004 Classic with two batteries, but I think my batteries are Group 27s.
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