ECO-WORTHY Wallbank S100
An inexpensive wall-hung 5 kWh battery for indoor off-grid or backup systems. Pick the UL-listed Cubix100 if you need a permit.
ECO-WORTHY $869.99$869.99
The ECO-WORTHY Wallbank S100 is the better 48V solar battery overall, rated 4.2 to 3.6. The ECO-WORTHY Wallbank S100 leads on value and features. The Briggs & Stratton SimpliPHI 6.6 wins on safety listing. The ECO-WORTHY Wallbank S100 costs $2,493 less ($869.99 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 ECO-WORTHY Wallbank S100 for value ($170 per rated kWh vs $505 per rated kWh) and features (inverter communication, app; no self-heating vs inverter communication; no self-heating).
- Choose the Briggs & Stratton SimpliPHI 6.6 for safety listing (UL 1973, UL 9540 listed vs no UL listing).
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 | ECO-WORTHY Wallbank S100 | Briggs & Stratton SimpliPHI 6.6 |
|---|---|---|
| Overall rating | 4.2/5 | 3.6/5 |
| Value 35% | 96 $170 per rated kWh | 21 $505 per rated kWh |
| Output 15% | 100 100 A continuous (about 5.1 kW) | 100 130 A continuous (about 6.7 kW) |
| Warranty 15% | 100 10-year warranty | 100 10-year warranty |
| Safety listing 15% | 0 no UL listing | 100 UL 1973, UL 9540 listed |
| Cycle life 10% | 60 6,000 cycles at 80% depth, maker rating | 30 4,500 cycles at 100% depth, maker rating |
| Features 10% | 70 inverter communication, app; no self-heating | 40 inverter communication; no self-heating |
Specifications
| ECO-WORTHY Wallbank S100 | 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 | 5.1 kWh | - |
| Chemistry | LiFePO4 | LiFePO4 |
| Cycle life | 6,000 at 80% depth | 4,500 at 100% depth |
| Power | ||
| Continuous discharge | 100 A | 130 A |
| Peak discharge | - | 240 A |
| Max charge current | 100 A | 100 A |
| Modules in parallel | Up to 32 | Up to 18 |
| Safety and communication | ||
| UL 1973 | No | Yes |
| UL 9540A | No | Yes |
| UL 9540 | No | Yes |
| Communication | CAN, RS485, RS232 | CAN, RS485 |
| Works with inverters | Pylon, Growatt, Deye, Victron, SRNE, LuxPower, GoodWe | EG4, Sol-Ark, Growatt, Megarevo, Solis |
| Self-heating | No | No |
| App | Yes | No |
| Build | ||
| Display | No | - |
| Built-in breaker | Yes | - |
| Enclosure | - | IP20 (IP65 when stacked) |
| Dimensions | 18.2 x 19.1 x 5.8 in | 726 x 440 x 170 mm (28.6 x 17.3 x 6.7 in), 480 mm with tabs |
| Weight | 97 lb | 125 lb |
| Warranty | 10 years | 10 years |
| Released | 2026-03 | 2024-04 |