A registry listing is a starting point. CEC inclusion is not nationwide installation approval. Confirm the exact model and configuration with your utility and local authority.
How to use this dataEquipment overview
40 kW, 184 kWh, 208 Vac LFP Energy Storage System
The figures below refer to MINI-40-135-184-208. Use the configuration table for other variants.
- Nameplate power
- 40 kW
- Nominal AC voltage
- 208 V AC
- Nameplate energy capacity
- 184 kWh
- Technology
- Lithium Iron Phosphate
- UL 1741 SB in CEC source
- Reported
- JA12 declaration
- Y (2022)
Specifications are reported in the CEC source; SolarApprovals has not independently tested this equipment. A missing value does not mean zero or a failed certification.
Exact configurations
CEC annotations in braces identify the listed configuration and are not part of the manufacturer’s model number. Variants share this canonical page.
| CEC model / configuration | Nameplate power | Capacity | Observation | Compare |
|---|---|---|---|---|
| MINI-40-135-184-208Energy Storage System row 2183 | 40 kW | 184 kWh | Listed in CEC |
Source specifications and conditions
Additional source information for MINI-40-135-184-208. Qualifiers, reported control modes and required devices are retained as written. Power-control listings do not establish arbitrary battery/inverter pairings.
- Brand
- Fortress Power LLC
- CEC listing date
- 2024-02-21
- Source last update
- 2024-06-11
- PV DC input capability
- Y
- UL 9540 certificate date
- 2023-12-26
- UL 9540 certifying entity
- Intertek
- Firmware version(s) tested
- No Information Submitted
- UL 1741 SB certificate date
- [7/20/2023]
- UL 1741 SB certifying entity
- TUV SUD America
- Certified JA12 control strategies
- Basic, TOU, Advanced DR
- Maximum continuous discharge rate (kW)
- 40
- Manufacturer-declared round-trip efficiency (%)
- 80
Documented compatibility
No specific equipment pairing has been verified for this model.
Shared voltage, a hybrid designation, or the same manufacturer does not establish compatibility. Check the manufacturer’s installation documents for exact model combinations, firmware, and operating conditions.
Registry observation history
Dates show when SolarApprovals observed a status. The first observation is not the original CEC listing date. History begins with our first import.
- Sep 21, 2026 · California Energy CommissionFirst observed: Listed in CECMINI-40-135-184-208
Archived CEC source