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batteries won't stay charged |
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ronnieb 
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Joined: 24 Oct 2020 Online Status: Offline Posts: 9 |
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 Topic: batteries won't stay chargedPosted: Today at 10:00am |
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My batteries won't stay charged after reaching 12 volts with a solar panel nor will they charge after driving. What to do?
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GlueGuy
Senior Member 
Joined: 15 May 2017 Location: N. California Online Status: Offline Posts: 2704 |
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Posted: Today at 11:17am |
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What are you expecting? Batteries do self-discharge, even with no load. So expect to have to charge them at least once a month without a load.
Separate from that, there can be parasitic loads that will discharge a battery much more quickly. In extreme cases, maybe only a day or two. You need to use a DC-capable ammeter to see what parasitic load you have. The parasitic load on our RP179 is about 1/4 amp, or 250 milliamps.
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bp
2017 R-Pod 179 Hood River 2015 Ford F150 SuperCrew 4WD 3.5L Ecoboost |
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ronnieb
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Joined: 24 Oct 2020 Online Status: Offline Posts: 9 |
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Posted: Today at 11:32am |
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Hi Glue Guy, I do charge the batteries every month, but on this last road trip, the batteries were at 7.6 volts after driving 10 hours..not enough to open the slide. I hade to start my truck to operate it.
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Tars Tarkas
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Joined: 14 Jan 2013 Location: Near Nashville Online Status: Offline Posts: 1454 |
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Posted: Today at 3:32pm |
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How old is the battery? Are all cells filled with water? Are all connections clean and tight? TT
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2010 176
FJ Cruiser |
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ronnieb
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Joined: 24 Oct 2020 Online Status: Offline Posts: 9 |
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Posted: Today at 5:36pm |
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Hey TT, The batteries are maybe 3 or 4 years old, I'm diligent about recharging them every month but on this last road trip I had to add distilled water.Still not able to keep a charge. I think my next move is to remove them and have them tested.Any other thoughts?
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Tars Tarkas
Senior Member
Joined: 14 Jan 2013 Location: Near Nashville Online Status: Offline Posts: 1454 |
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Posted: Today at 7:32pm |
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It's a bit of effort, but probably worth disconnecting every cable, from the ground on the frame, the batteries, and from the batteries to the converter, wire brush everything, and put it all back together. Then, if necessary, have the batteries tested. Could be something else, but that's probably what I'd do. TT
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2010 176
FJ Cruiser |
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