Self-heating 48V server rack battery  is designed for cold weather using!
Can safely charge at temperatures down to -20°C (-4°F) by a standard charger or solar charger. 
The heater pads which draws power from the charger itself.
 
RX-LFP48100-H  
Nominal voltage ：51.2V
Nominal capacity@0.2C ：100 Ah
Min. capacity@0.2C：100 Ah
​Nominal energy :5120Wh
Dimesion(W*D*H):482.6x460x133mm | 19 x 18.1 x 5.23 inch
Weight: ~47kg (103.6lb)