SolaX Power A1-ESS-Fit

4.5–18.9 kWh · Lithium Iron Phosphate · 36 configurations

UL 9540CEC listed · Feb 11, 2021

Nameplate energy4.5–18.9 kWh
ChemistryLithium Iron Phosphate

Overview

CEC Energy Storage System List

A1-ESS-Fit: 4.5–18.9 kWh nameplate energy; lithium iron phosphate.

Models & configurations

CEC Energy Storage System List · 36 listings

Model	Energy	Power	Grid voltage	Round trip	CEC listed
A1-ESS-Fit {6kW, 4.5kWh}	4.5 kWh	6 kW	240 V	—	Feb 11, 2021
A1-ESS-Fit {7kW, 4.5kWh}	4.5 kWh	7 kW	240 V	—	Feb 11, 2021
A1-ESS-Fit {7.6kW, 4.5kWh}	4.5 kWh	7.6 kW	240 V	—	Feb 11, 2021
A1-ESS-Fit {8.6kW, 4.5kWh}	4.5 kWh	8.6 kW	240 V	—	Feb 11, 2021
A1-ESS-Fit {6kW, 5.8kWh}	5.8 kWh	6 kW	240 V	—	Feb 11, 2021
A1-ESS-Fit {7kW, 5.8kWh}	5.8 kWh	7 kW	240 V	—	Feb 11, 2021
A1-ESS-Fit {7.6kW, 5.8kWh}	5.8 kWh	7.6 kW	240 V	—	Feb 11, 2021
A1-ESS-Fit {8.6kW, 5.8kWh}	5.8 kWh	8.6 kW	240 V	—	Feb 11, 2021
A1-ESS-Fit {6kW, 6.3kWh}	6.3 kWh	6 kW	240 V	—	Feb 11, 2021
A1-ESS-Fit {7kW, 6.3kWh}	6.3 kWh	7 kW	240 V	—	Feb 11, 2021
A1-ESS-Fit {7.6kW, 6.3kWh}	6.3 kWh	7.6 kW	240 V	—	Feb 11, 2021
A1-ESS-Fit {8.6kW, 6.3kWh}	6.3 kWh	8.6 kW	240 V	—	Feb 11, 2021
A1-ESS-Fit {6kW, 9kWh}	9 kWh	6 kW	240 V	—	Feb 11, 2021
A1-ESS-Fit {7kW, 9kWh}	9 kWh	7 kW	240 V	—	Feb 11, 2021
A1-ESS-Fit {7.6kW, 9kWh}	9 kWh	7.6 kW	240 V	—	Feb 11, 2021
A1-ESS-Fit {8.6kW, 9kWh}	9 kWh	8.6 kW	240 V	—	Feb 11, 2021
A1-ESS-Fit {6kW, 11.5kWh}	11.5 kWh	6 kW	240 V	—	Feb 11, 2021
A1-ESS-Fit {7kW, 11.5kWh}	11.5 kWh	7 kW	240 V	—	Feb 11, 2021
A1-ESS-Fit {7.6kW, 11.5kWh}	11.5 kWh	7.6 kW	240 V	—	Feb 11, 2021
A1-ESS-Fit {8.6kW, 11.5kWh}	11.5 kWh	8.6 kW	240 V	—	Feb 11, 2021
A1-ESS-Fit {6kW, 12.6kWh}	12.6 kWh	6 kW	240 V	—	Feb 11, 2021
A1-ESS-Fit {7kW, 12.6kWh}	12.6 kWh	7 kW	240 V	—	Feb 11, 2021
A1-ESS-Fit {7.6kW, 12.6kWh}	12.6 kWh	7.6 kW	240 V	—	Feb 11, 2021
A1-ESS-Fit {8.6kW, 12.6kWh}	12.6 kWh	8.6 kW	240 V	—	Feb 11, 2021
A1-ESS-Fit {6kW, 13.5kWh}	13.5 kWh	6 kW	240 V	—	Feb 11, 2021
A1-ESS-Fit {7kW, 13.5kWh}	13.5 kWh	7 kW	240 V	—	Feb 11, 2021
A1-ESS-Fit {7.6kW, 13.5kWh}	13.5 kWh	7.6 kW	240 V	—	Feb 11, 2021
A1-ESS-Fit {8.6kW, 13.5kWh}	13.5 kWh	8.6 kW	240 V	—	Feb 11, 2021
A1-ESS-Fit {6kW, 17.3kWh}	17.3 kWh	6 kW	240 V	—	Feb 11, 2021
A1-ESS-Fit {7kW, 17.3kWh}	17.3 kWh	7 kW	240 V	—	Feb 11, 2021
A1-ESS-Fit {7.6kW, 17.3kWh}	17.3 kWh	7.6 kW	240 V	—	Feb 11, 2021
A1-ESS-Fit {8.6kW, 17.3kWh}	17.3 kWh	8.6 kW	240 V	—	Feb 11, 2021
A1-ESS-Fit {6kW, 18.9kWh}	18.9 kWh	6 kW	240 V	—	Feb 11, 2021
A1-ESS-Fit {7kW, 18.9kWh}	18.9 kWh	7 kW	240 V	—	Feb 11, 2021
A1-ESS-Fit {7.6kW, 18.9kWh}	18.9 kWh	7.6 kW	240 V	—	Feb 11, 2021
A1-ESS-Fit {8.6kW, 18.9kWh}	18.9 kWh	8.6 kW	240 V	—	Feb 11, 2021

Capacity & power

CEC Energy Storage System List

Nameplate energy (CEC)4.5–18.9 kWh
Rated power (CEC)6–8.6 kW
ChemistryLithium Iron Phosphate
Grid connection240 V

Safety listings

CEC Energy Storage System List

UL 9540 (energy storage system)Certified by CSA Group
Certificate date & editionSep 22, 2020 · Ed. 1 : 2016

UL 9540 certifies the whole storage system; UL 9540A is the fire-propagation test that fire codes ask for indoors and near walls.

California grid & code compliance

CEC Energy Storage System List

UL 1741 SB (IEEE 1547-2018)No
UL 1741 SA (Rule 21)Yes
CSIP (IEEE 2030.5)Yes (with conditions)
JA12 declaration (Title 24)No
Monitor Key Data schedulingYes

Questions & answers

How much energy does the SolaX Power A1-ESS-Fit store?

4.5–18.9 kWh nameplate, per the California Energy Commission list.

Is the A1-ESS-Fit UL 9540 certified?

Yes — the CEC list shows UL 9540 certification (certified by csa group).

Sources

California Energy Commission — Energy Storage System List, data as of Oct 7, 2026. Manufacturer-reported values confirmed by CEC against certificates.