I recently installed 2 Lion Energy UT 1300 105Ah LiFePo4 batteries in parallel in my motorhome. I have decided to add one more battery also in parallel. My first instinct was to simply buy a third UT 1300 to add to my existing bank, but after watching Will’s recent video on the SOK and BigBattery 12 volt LiFePo4 offerings I thought I might add a BigBattery 170 Ah instead of a third UT 1300. Both are built with prismatic cells and have their own BMS. Would mixing these two different batteries in parallel be acceptable? I called BigBattery and asked them. Their response is “not recommended.” They mentioned that it might cause an inbalance in discharging or charging cycles resulting in premature failure of one or more of the three batteries. What would be the pros and cons, and risks of going forward with mixing the two? Is BigBatteries concern legitimate? Thanks for the help!