Lion Lithium Battery Warmer 20 amp truck camper and is a

truck camper and is a good solution for backup or off grid power solutions

Keep plugged in or recharge every 4 months of non-use

Short-Circuit Current (Isc): 5

each solar panel comes with 12AWG cable with MC4 male/female quick connectors，Can be connected in parallel via branch connectors or in series without any connectors

1PC 60A MPPT Charge Controller

Lion Lithium Battery Warmer 20 amp truck camper and is aLion Lithium Battery Warmer The lithium battery heating system allows you to use your lithium batteries on those cold weather campouts. Uses only 1 2 amp draw! ALL types of batteries need to be above freezing in order to charge them. The thermostat turns on at 42 F with a + of 5 degrees. It turns off at 68 F with a + of 5 degrees.