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Old 09-26-2021, 04:39 AM   #1
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Small Solar panel on top

I have a 99 Discovery that has a small solar panel on the air conditioner in front of the rig. I want to upgrade the battery solar and was wondering What is the max watts that I can add to replace. Doesn’t seem to have enough to really charge any kind of battery in my opinion. Can I leave it there and just add another panel to it tapping int the wiring. Is there a controller somewhere that controls the unit from over charging the batteries. I assume it charges the house batteries? Do they bleed off to the staring batteries?
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Old 09-26-2021, 04:50 AM   #2
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I would, and did on our '98 Safari Trek, leave it in place and start fresh.

Our Trek has a 35(?) o;d panel on top with a small PWM controller that fed house and chassis batteries.

There are a lot of threads around here on what it takes to set up a portable or roof top solar system.

First thing to do is get a shunt based battery monitor installed so you can track usage and charging. This will give you info you need on how much solar you need/want by measuring the amount of power used. They run from about $45 to north of $200.
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