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Best Group 31 AGM Cranking Batteries for Cummins ISB 6.7 Diesel RV
Electrical Easy 1 hour 92 👍

Best Group 31 AGM Cranking Batteries for Cummins ISB 6.7 Diesel RV

I opened the hood this morning and spotted my 2017 Cummins 6.7 ISB barely cranking over with those AGM batteries that were fine yesterday. I'm pretty sure I need Group 31s but wondering if I should go AGM or stick with regular flooded batteries?

I keep hearing good things about Duracell and NAPA batteries - anyone have experience with these brands on a diesel setup? Also wondering what CCA rating I should be looking for and if I really need to replace both batteries at the same time (one's still cranking okay but the other's getting weak).

Just want something reliable that can handle those cold morning starts without leaving me stranded! …more
BT Cruiser Battery Upgrade for Boondocking - Space Limited
Electrical Medium 2-3 hours 66 👍

BT Cruiser Battery Upgrade for Boondocking - Space Limited

Called my buddy who had the same battery woes on his Class C — second deep cycle fixed him right up, but this BT Cruiser's tiny compartment has me completely stumped. Currently running one Interstate 27M deep cycle battery (88AH) but need more capacity so I don't have to fire up the generator constantly. Problem is my battery compartment is tiny - only fits 12"x15" tray with 11" height clearance. Looking at either two 6V Duracell GC2s, or single Redodo LiFePO4 batteries (140AH or 165AH in group 31 size). My converter is WFCO WF-8955PEC with 14.4V bulk, 13.6V absorption, 13.2V float charging. Will this converter work properly with these battery options, and which would you recommend for under $700? …more
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