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Old 10-10-2012, 03:32 PM   #1
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Solar Charger on Top of AC Unit

I believe it still works. Was wondering if it will continue to send a charge to the batteries when I turn off the battery switches during storage. or if that circuit gets shut off too?

Nothing is left on, and I have the Main (starter) & Aux (house) switches off. I do have a Walmart Everstart Battery Monitor http://www.walmart.com/ip/Everstart-...ndingMethod=rr

hooked up to the house batteries, mounted on the dash. It probably uses some power to operate.

It says 12.4v after sitting in storage for 6 wks. I would think that if the solar charger were working, I'd have at least 12.8v consistant.


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Old 10-10-2012, 04:38 PM   #2
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If this is a factory panel, it's probably only 10-20 watts. Just about useless unless it's stored in a sunny spot and in a sunny region of the country. They are wired to charge the house batts with disconnect engaged. If you have 12.4v after 6 weeks, it's a toss up whether it's working or not.

The only way to know for sure would be to find the inbound wires to the BCC, or test the voltage at the panel.

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Old 10-10-2012, 06:04 PM   #3
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Old 10-10-2012, 06:29 PM   #4
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Most charges of that size on roof or some on AC cover are for maintaining your chassis battery.
Your ECM,TCM, radio and some LP detectors are off the chassis battery.
It puts out enough to keep the battery from discharging.
Here is a diagram of circuit.
It is on all the time the battery cut off switch has nothing to do with it.
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Old 10-11-2012, 12:58 PM   #5
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FWIW, we have a 5W panel on our AC and leave our mh in storage for several months at a time and have never had a problem with depleted batteries.
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