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Old 11-13-2014, 01:53 PM   #1
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Solar Charger to house batteries

Hi everyone. I just purchased a Battery Tender brand solar charger for my house batteries. I already hooked one up to my engine battery and it works great. I leave it on top of my dash on a blanket and I haven't had problems with the battery being discharged since. I want to hook up my new solar charger to the coach/house batteries and I'm not sure which one I need to hook it up to. I would guess that one battery get the direct charge from the generator or plug in power converter and then excess voltage goes to the second battery. Anyone know if this is how things work. If so, when I hook up the solar charger to the main battery, will this charge both batteries once the first battery is fully charged? I hope there is someone who has performed this on their rig. Thanks for any answers to my problem.
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Old 11-18-2014, 03:14 PM   #2
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If you have a multiple battery system you have to wire across the battery bank. Wire the positive or negative of one battery and the opposite post on the furthest battery in the bank.

Don't wire to just one battery as it's inefficient and the second or further batteries won't ever be charged up.

Example - Positive on battery one and negative on battery two. Or Positive on battery one and negative on battery 4. The charge has to go through the battery bank.

Jeff
Zamp Solar
Welcome to Zamp Solar - Power to Explore | Zamp Solar
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Old 11-18-2014, 06:52 PM   #3
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Thanks again, ZampSolar. I explored your website for a little while and will be back when I need more solar power items.
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Old 11-18-2014, 06:53 PM   #4
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If you have a multiple battery system you have to wire across the battery bank. Wire the positive or negative of one battery and the opposite post on the furthest battery in the bank.
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Old 11-18-2014, 10:29 PM   #5
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Thanks Yarome. That is exactly what I am going to do. I have a new battery tender to install for two batteries and will do it this way. I also have a solar charger that is cracked and was going to use that, but wasn't sure if I could. I put through panels in the front windshield area on the dash, but was concerned about the safety of a cracked solar panel.
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Old 11-19-2014, 04:43 AM   #6
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. I put through panels in the front windshield area on the dash, but was concerned about the safety of a cracked solar panel.
As long as all of the panel cells and connections are intact safety is not an issue. More of an issue would be the cracked glass covering your panel. At certain angles it can diffuse light and basically act the same as a shadow over your panel. Since you are using it inside your windshield I would remove the glass completely in the short term and replace it at my earliest convenience.

Sounds like you are good to go!
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Old 11-19-2014, 07:40 PM   #7
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I'm not sure how a panel is made. Is the glass separate from the cell so that you can take apart the frame and the glass separates from the other materials?
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Old 11-20-2014, 03:30 PM   #8
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You wouldn't want to separate the glass. Likely you cannot do it but if you can I wouldn't suggest doing it.

Having a panel that is sealed would be best for longevity. If the solar panel has glass that you can separate there is a chance you can get moisture inside.

-Jeff
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Old 11-20-2014, 03:38 PM   #9
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Is the glass separate from the cell so that you can take apart the frame and the glass separates from the other materials?
Yes. The frame and glass are independent from the cells.
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Old 11-20-2014, 03:44 PM   #10
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You wouldn't want to separate the glass. Likely you cannot do it but if you can I wouldn't suggest doing it.
I'm a bit curious. Why would you NOT want to replace the glass and how would it be a detriment to the voltaic cells?

With cracked glass casting a shadow you are cutting the legs out from the entire panel. What hazards do you foresee in changing out the glass or frame?
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