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
50kW, 480 Vac, transformer-less, 3-phase, Multi-Mode Grid Support Utility Interactive Energy Storage Inverter
The figures below refer to BESI-50kW-480 {480V}. Use the configuration table for other variants.
- Continuous AC output
- 49.35 kW
- Nominal AC voltage
- 480 V AC
- CEC weighted efficiency
- 94 %
- Technology
- Not reported
- UL 1741 SB in CEC source
- Not reported as Y
- CEC source lists
- Battery
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 AC output | Voltage / display | Observation | Compare |
|---|---|---|---|---|
| BESI-50kW-480 {480V}Battery_Inverters row 648 | 49.35 kW | 480 V AC | Listed in CEC |
Source specifications and conditions
Additional source information for BESI-50kW-480 {480V}. Qualifiers, reported control modes and required devices are retained as written. Power-control listings do not establish arbitrary battery/inverter pairings.
- Built-in meter
- N
- Source last update
- 2018-10-15
- Firmware version(s) tested
- [00021618]
- UL 1741 SA certificate date
- [06/29/2018]
- UL 1741 SB certificate date
- No Information Submitted
- CSIP conformance as reported
- N
- UL 1741 SA certifying entity
- UL
- UL 1741 SB certifying entity
- No Information Submitted
- CEC grid-support listing date
- 2018-08-15
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 CECBESI-50kW-480 {480V}
Archived CEC source