For RV and off-grid owners who want one large battery instead of a pair. It also has enough BMS current for a 2,000W inverter.
Amazon $484.49
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.
- 300 Ah (3,840 Wh)Capacity
- 200 AContinuous output
- Self-heatingCold charging
- YesBluetooth
- 11 yearsWarranty
- $0.33Price / Wh
Price checked October 22, 2026. As an Amazon Associate we earn from qualifying purchases.
- 300 Ah in a Group 31 case replaces three 100Ah batteries in one box
- 200 A continuous runs a 2,000 W inverter from a single battery
- Charges in freezing weather thanks to built-in heating
- Bluetooth app and 11-year warranty with 3 years of full replacement
- At 58 lb it is a two-person lift into tight compartments
- Free replacement ends after year 3; later years only get a discount
- Taller than a standard Group 31 with handles and bolts, so check box clearance
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 | 12300A-H |
|---|---|
| Capacity | |
| Rated capacity | 300 Ah (3,840 Wh) |
| Nominal voltage | 12.8 V |
| Chemistry | LiFePO4 |
| Rated cycle life | 4,000 |
| Price per Wh | $0.33 |
| BMS | |
| Continuous discharge | 200 A |
| Peak discharge | 400 A for 3 s |
| Max charge current | 200 A |
| Low-temperature charging | Self-heating |
| Bluetooth monitoring | Yes |
| Series / parallel | up to 4 in series, 4 in parallel |
| Build | |
| Case size | Group 31 |
| Dimensions | 13.75 x 7.63 x 10.00 in |
| Weight | 58 lb |
| Terminals | M8 bolt |
| Water resistance | IP54 |
| Warranty | 11 years |
Alternatives in this size
For off-grid and RV systems that need the most storage per inch. It holds 4 kWh in a compact case with Bluetooth monitoring.
Amazon $829.99For RV and van builds that want a large, low-cost bank in one box from a known brand. Cold-climate users should look at a heated battery instead.
Amazon $593.99 Amazon $653.99Compare
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