2021 221RB pre wired for solar Question about on board charge controller)

[Lost@Last]

Purchased my Trancend 221Rb September of 2020. It is pre wired for solar on the roof (no solar installed). Wondering if I install a say a 100 watt solar panel if the current smart charge controller will keep the battery from overcharging. If it’s on shore power it will float but not sure if it will on solar. TIA!

[howson]

Purchased my Trancend 221Rb September of 2020. It is pre wired for solar on the roof (no solar installed). Wondering if I install a say a 100 watt solar panel if the current smart charge controller will keep the battery from overcharging. If it’s on shore power it will float but not sure if it will on solar. TIA!

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Can you elaborate more about the "current smart charge controller"? It's unusual to have a solar charge controller without a panel installed in a camper.

To directly answer your question, I've never read of any solar charge controller that overcharges a battery (if properly configured).

For a simple diagram of what I'm referencing, see https://gdrvowners.com/forum/solar/r...lar-prep-wired in the Solar Reference Material channel.

Howard

[Lost@Last]

Thanks Howard, I’ve read in the owners manual for the WF-8900 series converter that it has three stage smart charging, absorption, bulk and float. I guess I’m asking if the Jaboni port installed on the roof is then connected through the existing converter to the battery so that the battery cannot be overcharged and damaged. Sorry, I called the converter a controller in my first post.

edit: I’ve now seen your solar prep diagrams and it appears I will need to add the charge controller, fuses, etc myself. Thanks.

Bary

[Second Chance]

The WF-8900 converter/charger is just for charging the batteries from shore power - it has nothing to do with solar. (It also does not have a profile for lithium batteries.) If you were to install solar panels on the roof, you would need to also purchase and install a solar charge controller to handle that charging stream. Both the WFCO converter/charger and any solar charge controller you purchase are/would be designed to charge the battery properly without overcharging.

Rob

[Lost@Last]

Thanks Rob, I’m starting to get my head wrapped around the solar charging thing. I currently have a freestanding solar panel with controller that I use to charge my battery but am thinking it would be convenient to permanently install a basic system to keep my battery (future Batteries) topped off. Thanks again!