Originally Posted by Rick CA

Thanks to all for the comments. I believe it would be safe to run two of my 48v 18ah LiFePO4 batteries in parallel (not series) to overcome (test?) the “sag” scenario. Does anyone feel this is unsafe or otherwise, unwise? I would ensure both batteries are at the same charge level. My intention is simply to rule out the low voltage cut off as a condition of the controller and this would not be my long term solution. If the temporary parallel battery set-up solves my cut off problem, then my long term solution seems to be a new 52v 20+ah li-ion battery. I’d then KICK myself for buying these LiFePO4 batteries for the “safety and life cycle” advantages.