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Old 06-12-2021, 03:55 PM   #1
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Solar charge over 100%

Hello all....we are new-ish to the Escape and RV game in general. Got our used 5.0 last fall and only got to take it out once. Getting ready for a few days out to "relearn" all we can. I noticed the other day that the meter was showing the battery charge at just over 100% - maybe 104. Thought that was funny. Today it's 154. What the what How can the battery have 154% charge. That was just on solar. I was able to run the MaxxFan, etc. on the solar charge just fine. Having a secondary issue with the A/C with shore power now plugged in, but I need to dig around first before seeking help here on that one. Only mentioning in case there could be some tie in...

Any ideas? Should we be worried? I wish I could have gotten 154% on things when I was in school :-)

Jackie
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Old 06-12-2021, 04:38 PM   #2
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Originally Posted by Jgntch View Post
Hello all....we are new-ish to the Escape and RV game in general. Got our used 5.0 last fall and only got to take it out once. Getting ready for a few days out to "relearn" all we can. I noticed the other day that the meter was showing the battery charge at just over 100% - maybe 104. Thought that was funny. Today it's 154. What the what How can the battery have 154% charge. That was just on solar. I was able to run the MaxxFan, etc. on the solar charge just fine. Having a secondary issue with the A/C with shore power now plugged in, but I need to dig around first before seeking help here on that one. Only mentioning in case there could be some tie in...

Any ideas? Should we be worried? I wish I could have gotten 154% on things when I was in school :-)

Jackie
What are the DC & AC voltage readings?
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Old 06-12-2021, 09:44 PM   #3
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Got our used 5.0 last fall and only got to take it out once.
...
Jackie

Do you have any information on the age of the batteries (assuming they are a pair of 6-Volts)?
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Old 06-13-2021, 12:57 PM   #4
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Do you have any information on the age of the batteries (assuming they are a pair of 6-Volts)?
When we bought it last fall the original owner did mention the batteries could stand to be replaced. Would them going bad cause the ďoverĒ charge?
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Old 06-13-2021, 02:37 PM   #5
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When we bought it last fall the original owner did mention the batteries could stand to be replaced. Would them going bad cause the “over” charge?
I'll go out on a limb here...
If the batteries are at the end of their useful life, then for a number of reasons it could take more power to bring them up to "full" - where full is defined as the batteries not taking any more power. But the electronics that measure % of charge only sees what is going in, and doesn't take into account "why" more power than normal is going in.

A theoretical example. A good 100 Ah battery will need 110 Ah to go from empty to 100% full. A defective one might need 150Ah but the charge counter sees the extra 40 Ah and claims 140% charged.

With out knowing any of your specifics this is all speculation, but perhaps a formal "load test" of your batteries is in order.
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