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
The SOK 12V 280Ah Heated is the better 12V lithium battery overall, rated 3.9 to 3.7. The SOK 12V 280Ah Heated leads on warranty and cold weather. The ECO-WORTHY EnergyRock 12V 280Ah wins on value. The ECO-WORTHY EnergyRock 12V 280Ah costs $559.01 less ($439.99 vs $999).
ECO-WORTHY EnergyRock 12V 280Ah
#6 in LargeFull review
For RV and van owners who want the cheapest way into a 3.5 kWh bank and have a dry, sheltered spot to bolt it down.
Amazon $439.99 ECO-WORTHY $439.99$439.99
Prices were last checked October 31, 2026 and are subject to change; the price and availability shown by the retailer at the time of purchase apply.
Which should you buy?
- Choose the SOK 12V 280Ah Heated for warranty (7-year warranty vs 3-year warranty) and cold weather (self-heating, so it charges below freezing vs stops charging below freezing (no heater)).
- Choose the ECO-WORTHY EnergyRock 12V 280Ah for value ($0.12 per rated Wh vs $0.28 per rated Wh).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every large 12V lithium battery; a clear win is highlighted. How we rank explains each one.
| Factor weight | SOK 12V 280Ah Heated | ECO-WORTHY EnergyRock 12V 280Ah |
|---|---|---|
| Overall rating | 3.9/5 | 3.7/5 |
| Value 35% | 63 $0.28 per rated Wh | 94 $0.12 per rated Wh |
| Tested capacity 15% | 50 not yet independently tested (neutral score used) | 50 not yet independently tested (neutral score used) |
| Output 15% | 50 200 A continuous (about 2,560 W at 12.8 V) | 50 200 A continuous (about 2,560 W at 12.8 V) |
| Warranty 15% | 75 7-year warranty | 25 3-year warranty |
| Cycle life 10% | 100 8,000 cycles, maker rating | 50 cycle life not published (neutral score used) |
| Cold weather 10% | 100 self-heating, so it charges below freezing | 60 stops charging below freezing (no heater) |
Specifications
| SOK 12V 280Ah Heated | ECO-WORTHY EnergyRock 12V 280Ah | |
|---|---|---|
| Capacity | ||
| Rated capacity | 280 Ah (3,584 Wh) | 280 Ah (3,584 Wh) |
| Nominal voltage | 12.8 V | 12.8 V |
| Chemistry | LiFePO4 | LiFePO4 |
| Rated cycle life | 8,000 | - |
| Price per Wh | $0.28 | $0.12 |
| BMS | ||
| Continuous discharge | 200 A | 200 A |
| Peak discharge | 250 A for 7.5 s | 220 A for 10 s |
| Max charge current | 120 A | 200 A |
| Low-temperature charging | Self-heating | Charge cutoff only |
| Bluetooth monitoring | Yes | Yes |
| Series / parallel | up to 4 in series | up to 4 in series, 4 in parallel |
| Build | ||
| Dimensions | 13.07 x 9.52 x 9.84 in | 16.54 x 8.64 x 9.65 in |
| Weight | 73 lb | 68.5 lb |
| Terminals | M8 | M8 |
| Warranty | 7 years | 3 years |
| Released | 2024-02 | 2026-06 |