Renogy 48V 50Ah Core Self-Heating
A rugged, heated 2.4 kWh battery for small 48 V off-grid and RV systems that don’t need inverter communication.
Renogy $701.99$701.99
3.3/5
Only worth buying to add matching modules to an existing eFlex bank. New systems should use the eFlex MAX, which costs far less.
- 5.4 kWhCapacity
- 60 AOutput
- 8,000Cycles
- YesUL 9540A
- 10 yearsWarranty
Check price at Amazon$3,750
Price checked October 24, 2026. As an Amazon Associate we earn from qualifying purchases.
Discontinued: no longer sold new; the links below may show remaining or used stock.
Pros
- IP65 aluminum case can go outdoors
- Up to 30 in parallel for large banks
- Talks to most major 48 V inverters
Cons
- Replaced in Fortress’s lineup and cannot be mixed with the newer eFlex MAX
- The Amazon price is more than double what the eFlex MAX costs at dealers
- Recommended continuous output is only 3 kW per module
How it scores
The rating comes from 6 measured or published factors, each scored 0-100 against fixed reference points for its case. How we rank explains each one.
Specifications
| Model number | eFlex 5.4 |
|---|---|
| Capacity | |
| Case | Wall or floor mount |
| Nominal voltage | 51.2 V |
| Capacity | 105 Ah |
| Energy | 5.4 kWh |
| Chemistry | LiFePO4 |
| Cycle life | 8,000 at 80% depth |
| Power | |
| Continuous discharge | 60 A |
| Peak discharge | 130 A |
| Max charge current | 100 A |
| Modules in parallel | Up to 30 |
| Safety and communication | |
| UL 1973 | Yes |
| UL 9540A | Yes |
| UL 9540 | Yes |
| Communication | CAN, Modbus, Wi-Fi |
| Works with inverters | Schneider, Sol-Ark, SMA, Midnite Solar, OutBack, Morningstar, Phocos, Victron, Growatt |
| Self-heating | No |
| App | Yes |
| Build | |
| Display | No |
| Enclosure | IP65 |
| Dimensions | 18 x 23 x 7.3 in (446 x 546 x 183 mm) |
| Weight | 108 lb |
| Warranty | 10 years |
| Released | 2020-06 |
Alternatives in this case
Victron Lithium NG 51.2V 100Ah
Only for owners of an all-Victron system who want everything managed through VictronConnect and VRM. Anyone else gets more storage for the money from a server-rack battery.
Current Connected $3,026$3,026
EG4 WallMount Indoor 100Ah Discontinued
A 5 kWh wall-hung battery for small indoor systems that don’t want a server rack. It is being dropped by retailers, so it suits owners adding to an existing bank more than new builds.
Compare
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