I'm having an issue with myinside lights. They ramdomly go from dim to bright. I have a WFCO 55 amp charger, that goes from 14.3 to 13.2, on a 1 minute cycle. I'm on 50 amp shore power at a campground...
Sounds like your WFCO is going flaky. I suggest a 35-45 amp Progressive Dynamics. Smaller than what you have but you don't need 55+ for 2 batteries and seldom boondocking. WFCO has probably seriously degraded your batteries. The may recover somewhat but would need some TLC to do so. (check water levels, apply a good charge, check SG and then equalize at near 16 volts while monitoring closely). Do not get another WFCO! Any RV dealer should have PD's in stock.
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