ECO-WORTHY Cubix100
#1 in Server rackFull review
A low-cost, UL-listed 5 kWh rack module for permitted indoor home backup. Pick a heated or low-temp model if it lives in an unheated space.
Amazon $889.99 ECO-WORTHY $889.99$889.99
The ECO-WORTHY Cubix100 rates 4.7 among server rack 48V solar batterys; the Briggs & Stratton SimpliPHI 6.6 rates 3.6 among wall and floor mount ones. The ECO-WORTHY Cubix100 costs $2,473 less ($889.99 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.
Scores side by side
These two sit in different case classes (server rack and wall and floor mount), and each is scored against the reference points for its own class, so a rating says how well each does among its own case peers. How we rank explains each factor.
| Factor weight | ECO-WORTHY Cubix100 | Briggs & Stratton SimpliPHI 6.6 |
|---|---|---|
| Overall rating | 4.7/5 | 3.6/5 |
| Value 35% | 95 $174 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% | 100 UL 1973, UL 9540 listed | 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 Cubix100 | Briggs & Stratton SimpliPHI 6.6 | |
|---|---|---|
| Capacity | ||
| Case | Server rack (19-inch) | 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 | 120 A | 240 A |
| Max charge current | 100 A | 100 A |
| Modules in parallel | Up to 32 | Up to 18 |
| Safety and communication | ||
| UL 1973 | Yes | Yes |
| UL 9540A | Yes | Yes |
| UL 9540 | Yes | Yes |
| Communication | CAN, RS485, RS232 | CAN, RS485 |
| Works with inverters | Victron, Deye, Growatt, Lux Power, Sol-Ark, GoodWe, EG4, SRNE | 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 | 22.09 x 19.02 x 5.63 in | 726 x 440 x 170 mm (28.6 x 17.3 x 6.7 in), 480 mm with tabs |
| Weight | 103 lb | 125 lb |
| Warranty | 10 years | 10 years |
| Released | 2026-03 | 2024-04 |