SOK 12V 280Ah Heated
#1 in LargeFull review
For full-time RV and van owners in cold climates who want a serviceable, heated battery with a long warranty and will pay extra for it.
Amazon $999$999
3.9/5
For RV and cabin owners who boondock in freezing weather and want one 300Ah battery that can charge safely in the cold.
- 300 Ah (3,840 Wh)Capacity
- 200 AContinuous output
- Self-heatingCold charging
- YesBluetooth
- 5 yearsWarranty
- $0.16Price / Wh
Check price at Amazon$599.99
Price checked October 31, 2026. As an Amazon Associate we earn from qualifying purchases.
Pros
- Charges in sub-freezing weather: the charger warms the cells before charging them
- 200 A output runs a 2,000 W inverter
- Bluetooth app shows charge level, current and cell temperature
- 5-year warranty
Cons
- At 55 lb it needs a solid mount and two hands
- Weak winter solar may not supply enough current to start the heater
- Vatrer’s store and Amazon listing disagree on rated cycles
How it scores
The rating comes from 6 measured or published factors, each scored 0-100 against fixed reference points for its size. How we rank explains each one.
Specifications
| Model number | D-300AH-HEI-JR-DJ |
|---|---|
| Capacity | |
| Rated capacity | 300 Ah (3,840 Wh) |
| Nominal voltage | 12.8 V |
| Chemistry | LiFePO4 |
| Rated cycle life | 4,000 |
| Price per Wh | $0.16 |
| BMS | |
| Continuous discharge | 200 A |
| Max charge current | 200 A |
| Low-temperature charging | Self-heating |
| Bluetooth monitoring | Yes |
| Series / parallel | up to 4 in series, 10 in parallel |
| Build | |
| Dimensions | 15.12 x 7.64 x 9.76 in |
| Weight | 54.7 lb |
| Terminals | M8 |
| Water resistance | IP65 |
| Warranty | 5 years |
| Released | 2023-12 |
Alternatives in this size
Epoch 12V 300Ah Essential
#3 in LargeFull review
For RVs and boats that want a large, heated, Bluetooth-monitored bank in one Group 31 case. It suits cold-weather users who would otherwise wire up three 100Ah batteries.
Epoch $1,249$1,249
Power Queen 12V 320Ah Mini
#4 in LargeFull review
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