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 3.6. The Growatt ALP 5.0L-E2 US leads on value and features. The Briggs & Stratton SimpliPHI 6.6 wins on output. The Growatt ALP 5.0L-E2 US costs $1,815.44 less ($1,547.55 vs $3,362.99).
Briggs & Stratton SimpliPHI 6.6
For homeowners and installers who want a neat, outdoor-rated stack that goes up in minutes with no battery cabling. It costs more per kWh than server-rack batteries, so it suits buyers who value the clean install and the Briggs warranty.
Off Grid Stores $3,362.99$3,362.99
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 value ($302 per rated kWh vs $505 per rated kWh) and features (inverter communication vs inverter communication; no self-heating).
- Choose the Briggs & Stratton SimpliPHI 6.6 for output (130 A continuous (about 6.7 kW) vs 60 A continuous (about 3.1 kW)).
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 | Briggs & Stratton SimpliPHI 6.6 |
|---|---|---|
| Overall rating | 4.0/5 | 3.6/5 |
| Value 35% | 66 $302 per rated kWh | 21 $505 per rated kWh |
| Output 15% | 43 60 A continuous (about 3.1 kW) | 100 130 A continuous (about 6.7 kW) |
| Warranty 15% | 100 10-year warranty | 100 10-year warranty |
| Safety listing 15% | 100 UL 1973, UL 9540A listed | 100 UL 1973, UL 9540 listed |
| Cycle life 10% | 50 cycle life not published (neutral score used) | 30 4,500 cycles at 100% depth, maker rating |
| Features 10% | 70 inverter communication | 40 inverter communication; no self-heating |
Specifications
| Growatt ALP 5.0L-E2 US | Briggs & Stratton SimpliPHI 6.6 | |
|---|---|---|
| Capacity | ||
| Case | Wall or floor mount | Wall or floor mount |
| Nominal voltage | 51.2 V | 51.2 V |
| Capacity | 100 Ah | 130 Ah |
| Energy | 5.1 kWh | 6.7 kWh |
| Usable energy | 4.6 kWh | - |
| Chemistry | LiFePO4 | LiFePO4 |
| Cycle life | - | 4,500 at 100% depth |
| Power | ||
| Continuous discharge | 60 A | 130 A |
| Peak discharge | - | 240 A |
| Max charge current | 60 A | 100 A |
| Modules in parallel | Up to 8 | Up to 18 |
| Safety and communication | ||
| UL 1973 | Yes | Yes |
| UL 9540A | Yes | Yes |
| UL 9540 | No | Yes |
| Communication | CAN | CAN, RS485 |
| Works with inverters | Growatt | EG4, Sol-Ark, Growatt, Megarevo, Solis |
| Self-heating | - | No |
| App | - | No |
| Build | ||
| Enclosure | IP66 | IP20 (IP65 when stacked) |
| Dimensions | 28.0 x 7.3 x 11.6 in | 726 x 440 x 170 mm (28.6 x 17.3 x 6.7 in), 480 mm with tabs |
| Weight | 101.4 lb | 125 lb |
| Warranty | 10 years | 10 years |
| Released | 2024-06 | 2024-04 |