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MicroinverterEnphase Energy

Enphase Energy IQ9N-A-DOM-US-HPB

Microinverter. 4 models, 405 W–440 W AC at 208 V / 240 V.

UL 1741 SBCEC listed · Nov 21, 2025
Model
  • Rated AC power440 W
  • CEC weighted efficiency97.5%

Models & power ratings

CEC Grid Support Inverter List (Oct 7, 2026) · NLR SAM inverter library · 4 models
ModelNominal ACGrid voltageCEC continuousRated AC (SAM)CEC weighted eff.DC test windowCEC listedUL 1741 SB
IQ9N-A-DOM-US +1 SKU405 W208 V405 W405 W97.5%28–45 VNov 21, 2025SB
IQ9N-A-DOM-US-HPB415 W208 V415 W415 W97.0%30–45 VJan 21, 2026SB
IQ9N-A-DOM-US +1 SKU427 W240 V427 W427 W97.5%28–45 VNov 21, 2025SB
IQ9N-A-DOM-US-HPB440 W240 V440 W440 W97.5%30–45 VJan 21, 2026SB

DC input (PV side)

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

Efficiency

CEC Grid Support Inverter List (Oct 7, 2026) · NLR SAM inverter library
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 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
IQ9N-A-DOM-US-HPB: max DC 45 V · MPPT 30–45 V (CEC test window)

Most-permitted panels in Southern California

PanelPowerVoc cold / Vmp hotCheckDC/ACInstalled together
Qcells Q.PEAK DUO BLK ML-G10.C+ 410410 W48.1 / 30.6 V✗ Cold Voc above max input0.93—
Qcells Q.PEAK DUO BLK ML-G10+ 410410 W48.1 / 30.6 V✗ Cold Voc above max input0.93—
LONGi LR5-54HABB-400M400 W39.3 / 25.3 V⚠ Below MPPT at peak heat0.91—
JA Solar JAM54S31-405/MR405 W39.4 / 25.5 V⚠ Below MPPT at peak heat0.92—
Hyundai Solutions HiN-T440NF(BK)440 W40.9 / 27 V⚠ Below MPPT at peak heat1—
Silfab Solar SIL-440QD440 W41.1 / 28 V⚠ Below MPPT at peak heat1—
Qcells Q.TRON BLK M-G2+ 430430 W41.3 / 28 V⚠ Below MPPT at peak heat0.98—
Qcells Q.TRON BLK M-G2.H+ 430430 W41.3 / 28 V⚠ Below MPPT at peak heat0.98—
REC Group REC460AA Pure-RX460 W68.8 / 47.1 V✗ Cold Voc above max input1.05—
Elin (Sirius PV) ELNSM54M-HC-410410 W39.3 / 25.3 V⚠ Below MPPT at peak heat0.93—
Qcells Q.TRON BLK M-G2.C+ 430430 W41.3 / 28 V⚠ Below MPPT at peak heat0.98—
Tesla TSP-420420 W43.4 / 27.7 V⚠ Below MPPT at peak heat0.95—
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 440 W inverters

CEC Grid Support Inverter List (Oct 7, 2026) · building permits
InverterPowerCEC weighted eff.DC test windowUL 1741 SBLatest CECSoCal permits
Enphase Energy IQ9 Series405 W–440 W97.5%30–45 VYes20260
Enphase Energy IQ8 Series240 W–633 W97.5%25–95 V44 of 4520251,104
Enphase Energy IQ7 Series190 W–384 W97.5%22–64 V114 of 1192022471
Hoymiles HM-xxxNT295 W–1.44 kW96.5%29–48 V11 of 1220233
MANGO POWER TECH LBZ-PV400 W–500 W97.0%36–55 VYes2026—
Same type and grid voltage, power range covering this model; same fields from the same sources.

About Enphase Energy

CEC Grid Support Inverter List (Oct 7, 2026)

Other series

IQ8 Series · 1104 permitsIQ7 Series · 471 permitsIQ8-3P Series · 1 permitsIQ9-3P Series

Documents

manufacturer documents

Questions & answers

How efficient is the Enphase Energy IQ9 Series?

The California Energy Commission lists a weighted efficiency of 97.0–97.5% for Enphase Energy IQ9 Series models, measured at six power levels and three DC voltages.

What sizes does the Enphase Energy IQ9 Series come in?

The CEC list includes 4 models from 405 W to 440 W AC: IQ9N-A-DOM-US, IQ9N-A-DOM-US-HPB, IQ9N-A-DOM-US, IQ9N-A-DOM-US-HPB.

Is the Enphase Energy IQ9 Series certified to UL 1741 SB?

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

What is the IQ9N-A-DOM-US-HPB’s DC input voltage range?

CEC tested it at 30–45 V DC.

Sources

  1. 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.
  2. Enphase Energy — document library on the manufacturer’s website (links above).
  3. NLR (formerly NREL) — System Advisor Model CEC inverter library (version 2026.7.3).
  4. NLR (formerly NREL) — PVWatts v8, NSRDB PSM v3 typical-year weather for Los Angeles, Palmdale, Riverside, Santa Clarita, Chula Vista, Huntington Beach.
  5. California Energy Commission — PV Module List (module electrical data for the compatibility check).
  6. Building permits — Southern California permit portals. Equipment matched from permit descriptions.
  7. Cali-Graf calculations — formulas and inputs are shown next to each calculated value (efficiency from area, temperature-corrected voltages, string sizing, energy estimates).