Can You Mix Batteries That Have Different Amp Hour Ratings

Question:

Do all of the batteries in my camper battery bank have to be the same AH rating? Could I use one Go Power 250 AH battery with one Go Power 100 AH battery?

asked by: Rick F

Expert Reply:

Yes, your RV batteries should all have the same voltage and amperage rating. The reason you cant mix match different batteries like Go Power Lithium RV Battery 34282740 and Go Power Lithium RV Battery # 34282738 that have different amp ratings is due to differences in battery management systems and battery cell counts, and there may be a charging and voltage discrepancy between batteries.

This will cause the highest voltage battery to charge the lowest voltage battery attempting to create balance in the circuit. The greater the difference in voltage, the higher the probability of battery failure.

expert reply by: Bryce D