![]() ![]() That’s right - this solar 12V battery charger has auto cut-off built right in. I can just leave the panel out in the sun and the charge controller will cut off the charging when the battery is full. Technically my solar car battery charger is done. It read 0.2 amps, meaning my solar panel was in fact charging my 12V battery. Then I looked at the PV current display on my charge controller. To test my solar car charger, I simply took the solar charger outside and put the panel in direct sunlight. Time to test it and see if it works… Step 3: Test Your Solar Car Battery Charger This means my solar car battery charger is complete! □ Now the solar panel is connected to the 12V battery via the solar charge controller. Note: If your solar panel has MC4 connectors, you’ll have to use MC4 adapter cables to be able to connect it to your charge controller. Step 2: Connect the Solar Panel to the Solar Charge ControllerĬonnect the solar panel wires to the solar panel (PV) terminals on your charge controller. ![]() Mine defaults to sealed lead acid, which is the type I was using. My solar charge controller turned on, indicating it was properly connected to the battery.Īt this point, consult your charge controller’s manual to see if you need to program it for your battery’s chemistry. Then I connected the stripped wire ends to the battery terminals on my solar charge controller. Red to red, black to black! (I also swapped out the inline fuse for the right fuse size given my solar panel wattage.) To do so, I connected the positive and negative ring terminals to their respective battery terminals. I can now connect charge controller and battery. Just like that, my “battery cables” are ready. Then I peeled the wires apart and stripped them with my wire strippers. (the GC018 is a 12V plug adapter that comes with an inline fuse and ring terminals.)įirst, I cut off the 12V plug socket with my wire cutters. I used the NOCO GC018 to make it super easy to connect my 12V battery to my solar charge controller. Step 1: Connect the Car Battery to the Solar Charge Controller These aren’t needed for the 5W and 20W panels linked above. MC4 adapter cables - Needed if your solar panel has MC4 connectors.If you want battery clamps, use the NOCO GC017. Wires, connectors, and fuses - I used the NOCO GC018 12V adapter, which comes with ring terminals.I’d use a 20W 12V solar panel or greater for a faster charge. ![]() 12V solar panel - I used a 5W 12V solar panel for a slow trickle charge.Renogy Wanderer 10A charge controller - or any cheap PWM charge controller.12V car battery - or just a standard 12V lead acid battery. ![]()
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