SOK SK12V280H 280Ah LiFePO4 battery is designed for cold weather usage! You can safely charge at temperatures down to 4°F by a standard charger or solar charge controller. Inverters R US hot tip:  The heater pads draw power from the charger itself, so no power lost from the battery cells themselves.

SOK SK12V280H Features:

7 year warranty and maintenance free with a 8000~12000 cycles life span.
Detachable cover with replaceable BMS and cells.
Built-in heater pad for using in down to -4°F.
Bluetooth4.0 , support iPhone or Android smartphone.
Support connect in parallel for larger capacity.
Built-in smart Battery Management System (BMS).
Low temperature charging cut-off.
High temperature charging or discharging cut-off.
Over charging and discharging protection.
Over current and short circuit protection.
Battery cells auto balance.
Note for connecting in series: DO NOT CONNECT OVER 4 Batteries IN SERIES, and make sure to add the battery voltage balancer.
 

SOK SK12V280H Charge Information:

Recommended Charge Current:    56 A
Maximum Charge Current:   120 A
Recommended Charge Voltage:    14.6 V
 
SK12V280H Discharge Information:

Maximum Continuous Discharge Current:    200 A
Peak Discharge Current:   250 A (7.5 s ±2.5 s)
Recommended Low Voltage Disconnect:    10.4V
 

SK12V280H Size Information:

Terminal Type:    M8, 5/16 lugs
Weight:    73 lbs.
Dimension (L x W x H):    13.07*9.52*9.84inch
Case Material:    Black paint aluminum case
 

SK12V280H Temperature Information:

Discharge Temperature:    -4 to 140 ºF
Charge Temperature:    4 to 113 ºF (built-in heater pad)
Storage Temperature:    23 to 95 ºF
 

The SK12V280H built-in heat pad turns on under the following conditions:

Temperature is below 0° C (32°F)
A charger is connected and able to supply sufficient current to the pads
≥ 4A for each 100Ah battery
≥ 7A for each 206Ah battery
 

For example, on a cold evening after the temperature drops down to under 0°C (32°F), when charging the heated battery, the battery would go into low temperature protection. Charging the cells is disabled, and if the charger is able to supply a sufficient amount of current, the

heat pad would automatically turn on. When the battery temperature exceeds 5°C (41°F), the heat pad turns off, and charging the cells is re-enabled.

Certifications Information:

UL1973 & IEC62619 for battery cells.