Bobbo wrote:
My vote is to immediately replace the WFCO with the PD at the same time as the wire is replaced. As has been mentioned, the WFCO generally never goes above 13.6v.
when I replaced my WFCO with a PD I kept the old WFCO unit. Friend had a 5th wheel with a WFCO, which of course would go to boost charge. So, I put a plug on the WFCO, took a few feet of #4 welding cable with studs on one end, connected the WFCO to his house batteries (two GC2) discharged to about 50%. Turned on the WFCO to see if it would go to boost. NOPE, tried and tried. so, he swapped out his WFCO in the trailer with the long run of #6 wire, plugged in the PD batteries charging in boost mode at 45A.
Just don't trust the WFCO to go into boost mode charging. Many times I've seen campers in our boondock locations running a generator all day with a WFCO and complaining they couldn't get through the night on the battery. Wonder why we only charged for an hour or two. Took my handy clamp on hall effect current meter and showed the WFCO was only charging at 10A or so and the draw in the trailer was a few amps, so really not charging at all, just running out of gas.
WFCO good point, you'll probably never run the battery low on water. But you' easily destroy a good battery prematurely by never getting it fully charged. 13.6V will never get the battery charged.