Growatt ALP 5.0L-E2 US
An outdoor-rated 5 kWh battery for owners of a Growatt US hybrid inverter. Owners of other inverter brands get more for less from a rack module.
Amazon $1,547.55$1,547.55
The Growatt ALP 5.0L-E2 US is the better 48V solar battery overall, rated 4.0 to 3.7. The Growatt ALP 5.0L-E2 US leads on safety listing. The BigBattery 48V Husky 2 INV wins on output and features. The Growatt ALP 5.0L-E2 US costs $32.45 less ($1,547.55 vs $1,580).
BigBattery 48V Husky 2 INV
For RV, van and small off-grid systems that need a rugged, weatherproof 48 V battery that talks to the inverter. Home systems that stay indoors get more for the money from a rack battery.
BigBattery $1,580 Signature Solar $1,580$1,580
Prices were last checked October 24, 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 Growatt ALP 5.0L-E2 US for safety listing (UL 1973, UL 9540A listed vs no UL listing).
- Choose the BigBattery 48V Husky 2 INV for output (100 A continuous (about 5.1 kW) vs 60 A continuous (about 3.1 kW)) and features (inverter communication, self-heating, app vs inverter communication).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every wall and floor mount 48V solar battery; a clear win is highlighted. How we rank explains each one.
| Factor weight | Growatt ALP 5.0L-E2 US | BigBattery 48V Husky 2 INV |
|---|---|---|
| Overall rating | 4.0/5 | 3.7/5 |
| Value 35% | 66 $302 per rated kWh | 65 $309 per rated kWh |
| Output 15% | 43 60 A continuous (about 3.1 kW) | 100 100 A continuous (about 5.1 kW) |
| Warranty 15% | 100 10-year warranty | 100 12-year warranty |
| Safety listing 15% | 100 UL 1973, UL 9540A listed | 0 no UL listing |
| Cycle life 10% | 50 cycle life not published (neutral score used) | 10 3,500 cycles, maker rating |
| Features 10% | 70 inverter communication | 100 inverter communication, self-heating, app |
Specifications
| Growatt ALP 5.0L-E2 US | BigBattery 48V Husky 2 INV | |
|---|---|---|
| Capacity | ||
| Case | Wall or floor mount | Wall or floor mount |
| Nominal voltage | 51.2 V | 51.2 V |
| Capacity | 100 Ah | 100 Ah |
| Energy | 5.1 kWh | 5.1 kWh |
| Usable energy | 4.6 kWh | - |
| Chemistry | LiFePO4 | LiFePO4 |
| Cycle life | - | 3,500 |
| Power | ||
| Continuous discharge | 60 A | 100 A |
| Peak discharge | - | 150 A |
| Max charge current | 60 A | 100 A |
| Modules in parallel | Up to 8 | Up to 16 |
| Safety and communication | ||
| UL 1973 | Yes | No |
| UL 9540A | Yes | No |
| UL 9540 | No | No |
| Communication | CAN | CAN, RS485 |
| Works with inverters | Growatt | EG4, Victron, Sol-Ark, Growatt, Luxpower, Schneider, Deye, SMA, Solis, Megarevo, Studer, Voltronic, Inhenergy, Afore |
| Self-heating | - | Yes |
| App | - | Yes |
| Build | ||
| Display | - | No |
| Enclosure | IP66 | IP65 / NEMA 4X |
| Dimensions | 28.0 x 7.3 x 11.6 in | 12.6 x 18.1 x 9.8 in (320 x 460 x 249 mm) |
| Weight | 101.4 lb | 100 lb |
| Warranty | 10 years | 12 years |
| Released | 2024-06 | - |