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Old 04-09-2019, 01:06 PM   #1
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Join Date: Feb 2019
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GP-PWM-30-UL - 2019 Forest River Forester

My 2019 Forester came with a GP-PWM-30-UL solar charge controller and a single panel on roof. In doing some research I noted the GP-PWM-30-UL has a space for 'battery 1' and 'battery 2' which it will charge Battery 2 after Battery 1 is fully charged.

Looking around, I realize GP-PWM-30-UL isn't a great charge controller - but nonetheless looking at options of utilizing it or other units. Thought maybe I'd get a second bay of batteries and run an inverter off it separately.

Anyhow - I pulled the panel off the wall and much to my amazement - it already has something cabled into Battery 2. (it may go nowhere, haven't been able to trace cables yet). Can anyone think of why it'd be there ? Is there a second set of batteries I wasn't aware of tucked in the RV somewhere?

In using the front panel - it references both batteries with different voltages too which is.... confusing.

Any thoughts would be appreciated.
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Old 04-09-2019, 01:23 PM   #2
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Join Date: Sep 2018
Location: Northern NJ
Posts: 3,310
I can't remember what wires were connected to back of mine, but I did have to pull it out of wall when I got home from dealership, because it didn't seem to be working. The wires were very loosely connected at factory. Snugged up connections and it worked. Who knows what the dealership or factory did with settings, mine was initially set for AGM. Go through all the settings and program it to match your setup.
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