FOXESS AIO-AC1-7.6-US

Name: FOXESS AIO-AC1-7.6-US
Brand: FOXESS

Battery inverter, ac-coupled battery inverter. 5 models, 3.8 kW–11.4 kW AC at 240 V.

UL 1741 SBCEC listed · Jul 1, 2025

Model

Rated AC power7.6 kW
CEC weighted efficiency97.0%

Models & power ratings

CEC Grid Support Inverter List (Oct 7, 2026) · NLR SAM inverter library · 5 models

Model	Nominal AC	Grid voltage	CEC continuous	Rated AC (SAM)	CEC weighted eff.	DC test window	CEC listed	UL 1741 SB
AIO-AC1-3.8-US	3.8 kW	240 V	3.78 kW	3.78 kW	95.5%	85–460 V	Jul 1, 2025	SB
AIO-AC1-5.7-US	5.7 kW	240 V	5.7 kW	5.7 kW	96.5%	122–460 V	Jul 1, 2025	SB
AIO-AC1-7.6-US	7.6 kW	240 V	7.59 kW	7.59 kW	97.0%	158–460 V	Jul 1, 2025	SB
AIO-AC1-9.6-US	9.6 kW	240 V	9.58 kW	9.58 kW	97.0%	200–460 V	Jul 1, 2025	SB
AIO-AC1-11.4-US	11.4 kW	240 V	11.3 kW	11.3 kW	97.0%	257–500 V	Jul 1, 2025	SB

Efficiency

CEC Grid Support Inverter List (Oct 7, 2026) · NLR SAM inverter library

CEC weighted efficiency97.0%
Night-time standby (tare)13.35 W
Power to start converting51.9 W

CEC weighted efficiency is measured by an accredited lab at six power levels and three DC voltages — the number to compare between inverters.

Grid & smart-inverter certification

CEC Grid Support Inverter List (Oct 7, 2026)

UL 1741 SB (3rd ed.)Yes — CSA Group, certificate Jan 17, 2025
UL 1741 SA (SA8–SA13)Yes — CSA Group
Firmware tested (SA)V1.08
Volt-VAr with reactive power priority (SA13)Yes
Freq-Watt / Volt-Watt (SA14–15)Yes
Disable permit service / limit active power (SA17–18)Yes
CSIP (IEEE 2030.5) conformanceVia gateway during testing (Y*)
Monitor key data & scheduling (Rule 21 Phase 3)Yes (attested Jun 11, 2025)
Power control system (PCS)Stated in CEC listing (power control system)
CEC listedJul 1, 2025

UL 1741 SB is required for new interconnections in California (Rule 21) since 2026.

Compare with similar 7.6 kW inverters

CEC Grid Support Inverter List (Oct 7, 2026) · building permits

Inverter	Power	CEC weighted eff.	DC test window	UL 1741 SB	Latest CEC	SoCal permits
FOXESS AIO-AC1-x.x-US	3.8 kW–11.4 kW	97.0%	158–460 V	Yes	2025	0
GoodWe GWxxxxA-BP	5 kW–9.6 kW	96.5%	200–495 V	Yes	2021	1
APsystems (Altenergy Power System) ELS	6.61 kW–11.4 kW	94.0%	51–60 V	Yes	2024	—
Hoymiles HAS-x.xLV-USG1	3.8 kW–11.5 kW	94.0%	50–60 V	Yes	2024	—
Alpha ESS SMILE-SPBx.x-INV	7.6 kW–9.6 kW	96.5%	200–495 V	Yes	2024	—

Same type and grid voltage, power range covering this model; same fields from the same sources.

About FOXESS

CEC Grid Support Inverter List (Oct 7, 2026)

ManufacturerFOXESS
Listed in CEC asFOXESS CO., LTD.
Websitefox-ess.com
Models on CEC lists117

Other series

AC1-x.x-US

Questions & answers

How efficient is the FOXESS AIO-AC1-x.x-US?

The California Energy Commission lists a weighted efficiency of 95.5–97.0% for FOXESS AIO-AC1-x.x-US models, measured at six power levels and three DC voltages.

What sizes does the FOXESS AIO-AC1-x.x-US come in?

The CEC list includes 5 models from 3.8 kW to 11.4 kW AC: AIO-AC1-3.8-US, AIO-AC1-5.7-US, AIO-AC1-7.6-US, AIO-AC1-9.6-US, AIO-AC1-11.4-US.

Is the FOXESS AIO-AC1-x.x-US certified to UL 1741 SB?

Yes — the CEC Grid Support Inverter List shows UL 1741 SB for all models.

Can the FOXESS AIO-AC1-x.x-US be used with a battery?

The CEC lists it as a ac-coupled battery inverter.

What is the AIO-AC1-7.6-US’s DC input voltage range?

CEC tested it at 158–460 V DC.

Sources

California Energy Commission — Grid Support Inverter List (solar and battery inverters), data as of Oct 7, 2026. Manufacturer-reported, confirmed by CEC against certificates and test reports.
NLR (formerly NREL) — System Advisor Model CEC inverter library (version 2026.7.3).
Building permits — Southern California permit portals. Equipment matched from permit descriptions.