[jetskier]

I just swapped out four lead-acid batteries to four Battle Born GC2s recently. I also installed the Victron 12/3000/50-120 inverter/charger to replace the factory installed 2000W Magnum and PD4575 charger. I disconnected the power to PD charger and programmed the Victron to charge at 120A (the max) with the charge settings on Battle Born's website. I also added a couple more PV panels on the roof (now up to 1175W). If I wanted to charge fast, I can run my 5500W Onan. Otherwise, I just let the PV panels do the work. I've saw a peak of PV charge current of 65A (over 900W) coming through over the weekend in the late March sun at my latitude. This is over the factory 10ga wire (PV side operates at ~70V and max 17amps). You could upgrade your PV charge controller and add more panels on the roof to overcome the shading problem.