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
The ECO-WORTHY EnergyRock 12V 280Ah is the better 12V lithium battery overall, rated 3.7 to 3.3. The ECO-WORTHY EnergyRock 12V 280Ah leads on value. The Battle Born 270Ah GC3 Heated wins on warranty, output and cold weather. The ECO-WORTHY EnergyRock 12V 280Ah costs $2,159.01 less ($439.99 vs $2,599).
Battle Born 270Ah GC3 Heated
#13 in LargeFull review
For large RV and marine banks that want one heated 270Ah battery from a US maker and can handle the weight and cost.
Inverters R Us $2,599$2,599
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 ECO-WORTHY EnergyRock 12V 280Ah for value ($0.12 per rated Wh vs $0.75 per rated Wh).
- Choose the Battle Born 270Ah GC3 Heated for warranty (10-year warranty vs 3-year warranty), output (300 A continuous (about 3,840 W at 12.8 V) vs 200 A continuous (about 2,560 W at 12.8 V)) and cold weather (self-heating, so it charges below freezing vs stops charging below freezing (no heater)).
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 | ECO-WORTHY EnergyRock 12V 280Ah | Battle Born 270Ah GC3 Heated |
|---|---|---|
| Overall rating | 3.7/5 | 3.3/5 |
| Value 35% | 94 $0.12 per rated Wh | 0 $0.75 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) | 100 300 A continuous (about 3,840 W at 12.8 V) |
| Warranty 15% | 25 3-year warranty | 100 10-year warranty |
| Cycle life 10% | 50 cycle life not published (neutral score used) | 33 3,000 cycles, maker rating |
| Cold weather 10% | 60 stops charging below freezing (no heater) | 100 self-heating, so it charges below freezing |
Specifications
| ECO-WORTHY EnergyRock 12V 280Ah | Battle Born 270Ah GC3 Heated | |
|---|---|---|
| Capacity | ||
| Rated capacity | 280 Ah (3,584 Wh) | 270 Ah (3,456 Wh) |
| Nominal voltage | 12.8 V | 12.8 V |
| Chemistry | LiFePO4 | LiFePO4 |
| Rated cycle life | - | 3,000 |
| Price per Wh | $0.12 | $0.75 |
| BMS | ||
| Continuous discharge | 200 A | 300 A |
| Peak discharge | 220 A for 10 s | - |
| Max charge current | 200 A | - |
| Low-temperature charging | Charge cutoff only | Self-heating |
| Bluetooth monitoring | Yes | - |
| Series / parallel | up to 4 in series, 4 in parallel | - |
| Build | ||
| Dimensions | 16.54 x 8.64 x 9.65 in | 22.83 x 7.09 x 13.15 in |
| Weight | 68.5 lb | 80.8 lb |
| Terminals | M8 | 0.25 in brass blades |
| Warranty | 3 years | 10 years |
| Released | 2026-06 | 2021-03 |