Anker (Anker Innovations) X1-P6K-US

Battery inverter, ac-coupled battery inverter. 1 model, 6 kW AC at 240 V.

UL 1741 SBCEC listed · Mar 21, 2024

Rated AC power6 kW
CEC weighted efficiency97.5%

AC output (grid side)

CEC Grid Support Inverter List (Oct 7, 2026)

Rated AC power6 kW
CEC-measured continuous output6.04 kW
Grid voltage240 V
Phasesplit-phase 120/240 V

Efficiency

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

CEC weighted efficiency97.5%
Night-time standby (tare)7.5 W
Power to start converting19.4 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 11, 2024
UL 1741 SA (SA8–SA13)No
Volt-VAr with reactive power priority (SA13)No
Freq-Watt / Volt-Watt (SA14–15)No
Disable permit service / limit active power (SA17–18)No
CSIP (IEEE 2030.5) conformanceVia gateway during testing (Y*)
Monitor key data & scheduling (Rule 21 Phase 3)Yes (attested Mar 21, 2024)
CEC listedMar 21, 2024

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

Battery & storage pairings

CEC Energy Storage System List

CEC-certified storage systems that include it

System	Energy	Power	Chemistry	CEC listed
Anker Innovations Limited X1-P6K-B05-US	5 kWh	3 kW	Lithium Iron Phosphate	Mar 21, 2024
Anker Innovations Limited X1-P6K-B10-US	10 kWh	6 kW	Lithium Iron Phosphate	Mar 21, 2024
Anker Innovations Limited X1-P6K-B15-US	15 kWh	6 kW	Lithium Iron Phosphate	Mar 21, 2024
Anker Innovations Limited X1-P6K-B20-US	20 kWh	6 kW	Lithium Iron Phosphate	Mar 21, 2024
Anker Innovations Limited X1-P6K-B25-US	25 kWh	6 kW	Lithium Iron Phosphate	Mar 21, 2024
Anker Innovations Limited X1-P6K-B30-US	30 kWh	6 kW	Lithium Iron Phosphate	Mar 21, 2024

Compare with similar 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
Anker (Anker Innovations) X1-PxK-US	6 kW–6 kW	97.5%	365–450 V	Yes	2024	0
GoodWe GWxxxxA-BP	5 kW–9.6 kW	96.5%	200–495 V	Yes	2021	1
FOXESS AIO-AC1-x.x-US	3.8 kW–11.4 kW	97.0%	85–500 V	Yes	2025	—
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	—

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

Questions & answers

How efficient is the Anker (Anker Innovations) X1-PxK-US?

The California Energy Commission lists a weighted efficiency of 97.5% for Anker (Anker Innovations) X1-PxK-US models, measured at six power levels and three DC voltages.

Is the Anker (Anker Innovations) X1-PxK-US certified to UL 1741 SB?

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

Can the Anker (Anker Innovations) X1-PxK-US be used with a battery?

The CEC lists it as a ac-coupled battery inverter. CEC-certified storage systems that include it: Anker Innovations Limited X1-P6K-B05-US, Anker Innovations Limited X1-P6K-B10-US, Anker Innovations Limited X1-P6K-B15-US.

What is the X1-P6K-US’s DC input voltage range?

CEC tested it at 365–450 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.
California Energy Commission — Energy Storage System List, data as of Oct 7, 2026. Manufacturer-reported values confirmed by CEC against certificates.
NLR (formerly NREL) — System Advisor Model CEC inverter library (version 2026.7.3).
Building permits — Southern California permit portals. Equipment matched from permit descriptions.