Yes. I don't know that the WFCO converter is meant to recover a battery from this state, even if it's a lithium-compatible WFCO.pthomas745 said:@webtab2021 did you ever get your lithium out of "low voltage disconnect mode?" The battery and the surge of power it might need to "jump start" it is the issue here. You may need a separate charger to get the battery to start to accept a charge from the trailer.