APsystems (Altenergy Power System) EZ1-LV

Microinverter. 1 model, 900 W AC at 120 V.

UL 1741 SBCEC listed · Oct 11, 2024

Rated AC power900 W
CEC weighted efficiency95.0%

DC input (PV side)

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

CEC test DC voltages (min / nom / max)28 / 36 / 45 V
DC input at rated output (CEC test)973 W

AC output (grid side)

CEC Grid Support Inverter List (Oct 7, 2026)

Rated AC power900 W
CEC-measured continuous output915 W
Grid voltage120 V
Phase120 V

Efficiency

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

CEC weighted efficiency95.0%
Night-time standby (tare)0.03 W
Power to start converting7.4 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 Jul 4, 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 Oct 11, 2024)
CEC listedOct 11, 2024

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

Panel compatibility & string sizing

NLR SAM inverter library · NLR PVWatts v8 · CEC PV Module List · Cali-Graf calculation

CityColdest air, °CHottest cell, °C

EZ1-LV: max DC 45 V · MPPT 28–45 V (CEC test window)

Most-permitted panels in Southern California

Panel	Power	Voc cold / Vmp hot	Check	DC/AC	Installed together
Qcells Q.PEAK DUO BLK ML-G10.C+ 410	410 W	48.1 / 30.6 V	✗ Cold Voc above max input	0.45	—
Qcells Q.PEAK DUO BLK ML-G10+ 410	410 W	48.1 / 30.6 V	✗ Cold Voc above max input	0.45	—
LONGi LR5-54HABB-400M	400 W	39.3 / 25.3 V	⚠ Below MPPT at peak heat	0.44	—
JA Solar JAM54S31-405/MR	405 W	39.4 / 25.5 V	⚠ Below MPPT at peak heat	0.44	—
Hyundai Solutions HiN-T440NF(BK)	440 W	40.9 / 27 V	⚠ Below MPPT at peak heat	0.48	—
Silfab Solar SIL-440QD	440 W	41.1 / 28 V	⚠ Below MPPT at peak heat	0.48	—
Qcells Q.TRON BLK M-G2+ 430	430 W	41.3 / 28 V	⚠ Below MPPT at peak heat	0.47	—
Qcells Q.TRON BLK M-G2.H+ 430	430 W	41.3 / 28 V	⚠ Below MPPT at peak heat	0.47	—
REC Group REC460AA Pure-RX	460 W	68.8 / 47.1 V	✗ Cold Voc above max input	0.5	—
Elin (Sirius PV) ELNSM54M-HC-410	410 W	39.3 / 25.3 V	⚠ Below MPPT at peak heat	0.45	—
Qcells Q.TRON BLK M-G2.C+ 430	430 W	41.3 / 28 V	⚠ Below MPPT at peak heat	0.47	—
Tesla TSP-420	420 W	43.4 / 27.7 V	⚠ Below MPPT at peak heat	0.46	—

Voltage check only, from CEC panel data and NLR weather for the city. Final design must follow the inverter manual and NEC 690.7.

Compare with similar 900 W 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
APsystems (Altenergy Power System) EZx-LV	900 W–900 W	95.0%	28–45 V	Yes	2024	0
Northern Electric & Power BDM-xxxx-LV	1.2 kW–1.6 kW	96.5%	22–55 V	Yes	2025	—

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

About APsystems (Altenergy Power System)

CEC Grid Support Inverter List (Oct 7, 2026)

ManufacturerAPsystems (Altenergy Power System)
Listed in CEC asAltenergy Power System Inc.
Websiteapsystems.com
Models on CEC lists101

Other series

QSxxxxQT2QTx-480QS1

Questions & answers

How efficient is the APsystems (Altenergy Power System) EZx-LV?

The California Energy Commission lists a weighted efficiency of 95.0% for APsystems (Altenergy Power System) EZx-LV models, measured at six power levels and three DC voltages.

Is the APsystems (Altenergy Power System) EZx-LV certified to UL 1741 SB?

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

What is the EZ1-LV’s DC input voltage range?

CEC tested it at 28–45 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).
NLR (formerly NREL) — PVWatts v8, NSRDB PSM v3 typical-year weather for Los Angeles, Palmdale, Riverside, Santa Clarita, Chula Vista, Huntington Beach.
California Energy Commission — PV Module List (module electrical data for the compatibility check).
Building permits — Southern California permit portals. Equipment matched from permit descriptions.
Cali-Graf calculations — formulas and inputs are shown next to each calculated value (efficiency from area, temperature-corrected voltages, string sizing, energy estimates).