Check if you have the WF-8955PEC power panel/converter. If so, WFCO makes a replacement main board for lithium batteries. Hope the below info helps:
Reply from WFCO: Hello,
1. The charge from the tow vehicle goes direct to the battery, not through the converter, and is not controlled in any way by the converter.
2. No it does not
3. It is a separate system, and operates independently from the converter.
4. Yes, just expect an increase in charge time.
On Wed, Jul 14, 2021 at 10:07 PM <email@example.com> wrote:
I have a Casita
Travel Trailer that came with the WF-8955PEC power panel. I replaced the AGM that was supplied by the factory and installed a 105 Ah 1344 Wh Lithium Iron Phosphate (LiFePO4) . I additionally replaced the WFCO 9855PEC main board with the WF-8950L2-MBA designed for Lithium batteries.
I understand that the WFCO PEC charges the battery when plugged into AC shore power. I have the following questions regarding the WFCO PEC:
1. When driving the tow vehicle, does the 12 volts+ supplied by the TV to the trailer through the 7 pin connector go to the WFCO PEC to charge the battery and is controlled by the PEC main board?
2. Does the WFCO PEC act as a DC to DC charger also while driving the tow vehicle?
3. I ordered the solar charger option with the Casita
. When I plug in the cable from the solar panels to the port on the outside of the Casita
trailer, does the charging controller on the back of the solar panel control the charging of the onboard lithium battery, or does the controller feed the WFCO PEC and the PEC controls the charging input from the solar panel?
4. Eventually I will add another 1 or 2 LiFePO4 batteries in parallel for a total of 315 Ah. Will the WF-8550L2-MBA be able to handle charging 3 batteries? I understand it will take longer to charge up all the batteries, but can the WF-8550L2 handle managing the charging of the 3 batteries whether on AC shore power or being charged from the tow vehicle while driving?