I'm building an off grid cabin where temperatures get below -20F so I'm hoping to use silicone salt batteries. I'm going to have 3kW of solar which will require a 48V system but I have not seen any silicone batteries above 12V. I'm worried about possible cell imbalances if I connect 4 in series without a BMS. Does anyone have experience with these batteries or know if they require a BMS? Thanks!