So I think most of us can agree that upgrading your T@G electrics from lead-acid to LiFePo4 is pretty much the way to go, with respect to power density & tongue weight reduction. What I'm thinking about today is updating my trailer's power center to maximize the benefits of those lovely lithium-iron batteries. I see two potential courses of action in my future, with respect to replacing the old-school WFCO WF-8725:
A.) a newer WFCO WF-8725-AD that auto-detects the battery type (or is supposed to, anyway) and is capable of LiFePo4-level charging
B.) a Progressive Dynamics 4100-series, probably the 4135, which is manually switched between lead-acid/AGM and LiFePo4
The new WFCO will certainly fit in the same hole in the coachwork as the existing power center. The PD would require minor carpentry to open up the WFCO's mounting hole but hardly by much, and it's definitely not too deep to fit in the bulkhead.
Wiring both units would be dreadfully easy, however the edge (and it's a small edge) goes to the WFCO, only because it would be a direct swap, matching color codes.
The AC breakers would be a direct swap over to a new WFCO. I'm not sure if they will fit the PD, however I do know what series of tandem breakers do fit it, so all I need to do is look at what make & model my current ones are in my old WFCO. It would certainly be nice if they did fit the PD, as tandem breakers aren't exactly dime-a-dozen.
The PD4135 would give me two additional fused DC circuits over the WFCO (the PD has six DC circuits to the WFCO's four), so I could fuse my added fridge power line at the power center, rather than having an inline fuse in the power cable.
The PD has a microswitch on the panel to select between AGM/lead-acid and lithium-iron operations. It's kinda hard (albeit not impossible) to screw that up. I have no evidence that WFCO's auto-detection system fails to work, however... Well... You know... Nothing's completely foolproof. I've learned through hard experience that if anything can go wrong, eventually it WILL go wrong.
Anyway, has anyone here had any first-hand experience with the PD4100 series? How'd ya like it? I know they're built about an hour south of me, here in Michigan, and I'd be lying if I didn't admit that has a tiny effect on me...
Dave in Michigan
'21 T@G XL (that secretly wants to be a Boonie)