We do not carry the WFCO-8735-LiS, however I do have another alternative.
Instead, I recommend going with the Progressive Dynamics RV Power Control Center with AC/DC Panel and Converter/Smart Charger # PD4135K.
This is designed to replace your WFCO-8735-P, and is compatible with lithium batteries. view full answer...
For a torsion axle such as your Avan Aliner we have kits available that will give you some extra clearance.
The Avan Aliner is a single axle trailer, so we have two kits that will work for you. Torsion axles must be side-mounted and not top mounted and can not be used with Torflex axles with 3 inch high profiles.
The first one I recommend is The Torflex Lift Kit - Single Axle - 2-5/8 inch Lift # K71-707-01 which is compatible with #10 Torflex axles with 2,300 to 4,000 pound capacities.... view full answer...
There is a way to accomplish what you are needing to do. But the 7-way isn't going to play a role in charging your battery and doesn't care if the battery is lithium or not. The hot wire coming from your 7-way would only ever be enough to trickle charge your battery.
If you are wanting to charge your battery while under way you will need a DC-DC charger like the Redarc In-Vehicle BCDC Battery Charger # 331-BCDC1225D.
You would also want a battery isolator like the Redarc Smart Start Battery... view full answer...
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