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
9.2 kW, 18.5 kWh, lithium iron phosphate battery
The figures below refer to eVaultMax. Use the configuration table for other variants.
- Continuous discharge power
- 9.2 kW
- Battery voltage (DC)
- Not reported
- Nameplate energy capacity
- 18.43 kWh
- Technology
- Lithium Iron Phosphate
- 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 | Continuous discharge power | Capacity | Observation | Compare |
|---|---|---|---|---|
| eVaultMaxBattery row 177 | 9.2 kW | 18.43 kWh | Listed in CEC |
Source specifications and conditions
Additional source information for eVaultMax. Qualifiers, reported control modes and required devices are retained as written. Power-control listings do not establish arbitrary battery/inverter pairings.
- Brand
- Fortress Power
- UL 1973 edition
- Ed. 2 : 2018
- CEC listing date
- 2021-09-01
- Source last update
- 2023-07-03
- UL 1973 certificate date
- 2021-06-18
- UL 1973 certifying entity
- Intertek
- Certified JA12 control strategies
- Sol-Ark 5K - Basic, TOU, Advanced Sol-Ark 8K - Basic, TOU, Advanced Sol-Ark 12K - Basic, TOU, Advanced Sol-Ark 15K - Basic, TOU, Advanced
- Manufacturer-declared round-trip efficiency (%)
- 98 [Sol-Ark 5K] 98 [Sol-Ark 8K] 98 [Sol-Ark 12K] 98 [Sol-Ark 15K]
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 CECeVaultMax
Archived CEC source