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Illustration · 144 half-cut cells
Solar panelAXITEC

AXITEC AC-400MH/144V

144 half-cut cells. Power classes 355–555 W in the CEC list; datasheet covers 530–555 W.

CEC listed · Aug 15, 2019UL 6173015-yr product + 25-yr performance warrantySeen in 1 SoCal permit
Power class
  • Power (STC)400 WCEC nameplate
  • Efficiency≈20.2%calculated from area
  • %/°C Pmax−0.35CEC test: −0.349
  • Output at year 2585%performance warranty

Power classes

CEC PV Module List (Oct 7, 2026) · Cali-Graf calculation · AXITEC datasheet · 26 models
ModelPmaxVoc, VIsc, AVmp, VImp, AEfficiencyPTCCEC listed
AC-355MH/144V355 W46.829.6039.019.10≈17.9%329 WAug 15, 2019
AC-360MH/144V360 W47.019.6939.209.18≈18.1%334 WAug 15, 2019
AC-365MH/144V365 W47.219.7739.399.27≈18.4%338 WAug 15, 2019
AC-370MH/144V370 W47.409.8539.609.35≈18.6%343 WAug 15, 2019
AC-375MH/144V375 W47.619.9339.819.43≈18.9%348 WAug 15, 2019
AC-380MH/144V380 W47.8010.0140.029.50≈19.2%353 WAug 15, 2019
AC-385MH/144V385 W48.0010.0840.219.58≈19.4%358 WAug 15, 2019
AC-390MH/144V390 W48.1810.4840.379.66≈19.7%364 WJan 13, 2020
AC-395MH/144V395 W48.3710.5640.559.74≈19.9%369 WJan 13, 2020
AC-400MH/144V400 W48.5510.6440.779.81≈20.2%374 WJan 13, 2020
AC-405MH/144V405 W48.7310.7140.959.89≈20.5%379 WJan 13, 2020
AC-410MH/144V410 W48.9110.7941.129.97≈20.7%383 WJan 13, 2020
AC-415MH/144V415 W49.6010.6640.9010.15≈21.7%384 WSep 13, 2021
AC-420MH/144V420 W49.7010.7641.0010.25≈22.0%389 WSep 13, 2021
AC-425MH/144V425 W48.3011.2340.5010.50≈20.0%392 WSep 13, 2021
AC-430MH/144V430 W49.2011.1940.6010.60≈20.3%397 WSep 13, 2021
AC-435MH/144V435 W49.4011.2640.8010.67≈20.5%402 WSep 13, 2021
AC-440MH/144V440 W49.6011.3341.0010.74≈20.8%407 WSep 13, 2021
AC-445MH/144V445 W49.8011.4041.2010.81≈21.0%411 WSep 13, 2021
AC-450MH/144V450 W50.0011.4741.4010.88≈21.2%416 WSep 13, 2021
AC-530MH/144V530 W49.3013.7241.3112.83≥20.5%496 WOct 3, 2022
AC-535MH/144V535 W49.4513.7941.4712.90≥20.7%500 WOct 3, 2022
AC-540MH/144V540 W49.6013.8641.6412.97≥20.9%505 WOct 3, 2022
AC-545MH/144V545 W49.7513.9341.8013.04≥21.1%510 WOct 3, 2022
AC-550MH/144V550 W49.9014.0041.9613.11≥21.3%515 WOct 3, 2022
AC-555MH/144V555 W50.0514.0742.1113.18≥21.5%520 WOct 3, 2022
≈ efficiency = Pmax ÷ CEC-listed area 1.98 m² for classes outside the datasheet.

Build & dimensions

CEC PV Module List (Oct 7, 2026) · AXITEC datasheets

Heat & cold behaviour

AXITEC datasheet · CEC PV Module List (Oct 7, 2026) · Cali-Graf calculation
DatasheetCEC listing test
Pmax coefficient γ−0.35 %/°C−0.349 %/°C
Voc coefficient β−0.29 %/°C−0.267 %/°C
Isc coefficient α+0.05 %/°C+0.043 %/°C
Vmp coefficient≈ −0.40 %/°C—
Operating cell temperatureNMOT 45 °CNOCT 44.5 °C
Vmp coefficient ≈ γ − α (datasheet); used only for the hot-roof voltage estimate.

Away from lab conditions — CEC listing test points

ClassPmax at NOCTVmp × Imp at NOCTPmax at 200 W/m²Low-light efficiency vs STC
355 W256.6 W35.83 V × 7.16 A66.3 W93%
360 W260.1 W36.01 V × 7.22 A67.2 W93%
365 W263.9 W36.18 V × 7.3 A68.2 W93%
370 W267.6 W36.37 V × 7.36 A69.1 W93%
375 W271.4 W36.57 V × 7.42 A70.1 W93%
380 W274.8 W36.76 V × 7.48 A71 W93%
385 W278.4 W36.93 V × 7.54 A71.9 W93%
390 W292.9 W37.33 V × 7.85 A75 W96%
395 W296.6 W37.5 V × 7.91 A76 W96%
400 W300.4 W37.7 V × 7.97 A77 W96%
405 W304.2 W37.87 V × 8.03 A77.9 W96%
410 W307.9 W38.03 V × 8.1 A78.9 W96%
415 W308.6 W39.05 V × 7.9 A78.7 W95%
420 W312.4 W39.15 V × 7.98 A79.6 W95%
425 W318.9 W37.78 V × 8.44 A82.5 W97%
430 W322.7 W37.87 V × 8.52 A83.5 W97%
435 W326.4 W38.06 V × 8.58 A84.5 W97%
440 W330.2 W38.24 V × 8.63 A85.4 W97%
445 W334 W38.43 V × 8.69 A86.4 W97%
450 W337.7 W38.62 V × 8.75 A87.4 W97%
530 W401.6 W38.41 V × 10.46 A102.5 W97%
535 W405.3 W38.56 V × 10.51 A103.4 W97%
540 W409.2 W38.72 V × 10.57 A104.4 W97%
545 W413 W38.87 V × 10.63 A105.4 W97%
550 W416.8 W39.02 V × 10.68 A106.4 W97%
555 W420.5 W39.15 V × 10.74 A107.3 W97%
Pmax = Vmp × Imp from the CEC listing; low-light efficiency = Pmax at 200 W/m² ÷ (20% of STC Pmax).

Electrical & strength ratings

AXITEC datasheet
Packaging: 31 per pallet

Certifications

CEC PV Module List (Oct 7, 2026) · AXITEC datasheet
UL 61730UL 1703IEC 61730Fire rating Type 1 (UL 61730)

Warranty & degradation

AXITEC datasheets

Inverter compatibility & string sizing

AXITEC datasheet · Cali-Graf calculation · NLR PVWatts v8 · CEC PV Module List (Oct 7, 2026) · inverter datasheets · NLR SAM inverter library · CEC Grid Support Inverter List (Oct 7, 2026)
51.8 V
Voc when cold
per panel
32.8 V
Vmp when hot
per panel
11
Max panels / string
max DC 600 V
2
Min panels / string
MPPT from 60 V
Defaults come from NLR TMY weather (coldest hour, hottest modeled cell). Code calculations (NEC 690.7) use the ASHRAE extreme annual minimum, which is usually colder — enter it above.

String inverters most named in SoCal permits

InverterMax DC inputMPPTWindow sourcePanels per string
Tesla 1538000-xx-y600 V60–480 Vdatasheet2–11
Solis (Ginlong) S6-EH1P10K-H-US600 V80–520 Vdatasheet3–11
Solis (Ginlong) Solis-1P7.6K-4G-US600 V100–500 Vdatasheet4–11
Qcells Q.VOLT H7.6SX498 V234–498 VCEC test window8–9

Microinverters (one per panel)

MicroinverterRecommended module powerMax DC inputMPPTVoc cold / Vmp hotCheckDC/AC
Enphase IQ8PLUS-72-2-US235–440 W60 V29–45 V51.8 / 32.8 V✓ Within range1.38
Enphase IQ8X-80-M-US320–540 W79.5 V43–60 V51.8 / 32.8 V✗ Not a match: module voltage below MPPT range1.05
APsystems (Alt Power System) DS3-L265–570 W60 V28–45 V51.8 / 32.8 V✓ Within range0.51
Enphase IQ8M-72-2-US260–460 W60 V30–45 V51.8 / 32.8 V✓ Within range1.23
Enphase IQ8A-72-2-US295–500 W60 V32–45 V51.8 / 32.8 V✓ Within range1.15
Voltage check against the microinverter datasheets — confirm the pairing on the manufacturer’s module compatibility list. Rows appear only when the panel’s power is inside the microinverter’s recommended module power range.
SolarEdge and other optimizer-based systems size strings by the optimizer rules — use the manufacturer’s designer. Reference inverters: most named in SoCal permits since Oct 2024.

Expected production in Southern California

NLR PVWatts v8 · Cali-Graf calculation
CitykWh / kW / yrkWh / panel / yrkWh / system / yrSun, kWh/m²/day
Los Angeles1,67667012,0676.08
Palmdale1,83573413,2126.69
Chula Vista1,69667812,2116.11
Huntington Beach1,64365711,8305.89
Riverside1,69667812,2116.21
Santa Clarita1,72469012,4136.28
788Jan788Feb1,012Mar1,117Apr1,104May1,173Jun1,236Jul1,250Aug1,093Sep964Oct829Nov717DeckWh per month · Los Angeles
Estimate for comparison, not a quote: shading, roof orientation and local losses change real output. Roof mount, 20° tilt, south, 14% system losses.

Compare with similar 400 W panels

CEC PV Module List (Oct 7, 2026) · Qcells datasheet · Kiwa PVEL Scorecard · building permits
PanelPmaxEfficiencyγ Pmax (CEC)Voc, VIsc, APVEL (product / brand)SoCal permits (series)
AXITEC AC-400MH/144V400 W≈20.2%−0.34948.5510.64—1
Qcells Q.PEAK DUO BLK ML-G10+ 400400 W≥20.4%−0.36245.311.14product 2022, 2023221
JA Solar JAM54S31-400/MR400 W≈21.1%−0.32937.0713.79product 2023, 2024152
REC Group REC400AA Pure400 W≈22.3%−0.25648.810.25brand 9× (2016–2025)66
Same fields from the same sources for every row; ≈ efficiency is calculated from the listed area. Comparable series: other brands, same product group, power range covering this class.

Documents

manufacturer documents

Questions & answers

How efficient is the AXITEC AC-400MH/144V?

Calculated from the panel area (1.98 m²): about 20.2% for the 400 W class. 400 W over 1.98 m² equals about 202 W per square meter.

How much energy does one panel produce in Los Angeles or Palmdale?

PVWatts v8 with typical-year weather gives about 670 kWh per year per 400 W panel in Los Angeles and about 734 kWh in Palmdale (20° roof, facing south, 14% system losses).

How much power does it lose on a hot roof?

With γ = −0.35 %/°C, at a 77 °C cell temperature (hottest modeled hour in Palmdale) output is about 18.1% below the STC rating.

How many panels fit on one string?

With the Tesla 1538000-xx-y (max DC 600 V, MPPT from 60 V, datasheet) in Los Angeles the calculator gives 2–11 panels per string (Voc at 2 °C = 51.8 V, Vmp at 74 °C cell = 32.8 V). Final design must follow the inverter manual and NEC 690.7.

Does it work with Enphase IQ8PLUS-72-2-US microinverters?

Voltage check against the Enphase datasheet: Voc when cold 51.8 V vs max input 60 V; Vmp when hot 32.8 V vs MPPT low 29 V; recommended module power 235–440 W. Confirm on the microinverter maker’s compatibility list.

What does the warranty cover?

15 years on the product and 25 years on performance: at least 85% after 25 years (manufacturer datasheet).

What fire rating does it have?

UL 61730 fire rating Type 1 per datasheet.

Sources

  1. California Energy Commission — Solar Equipment Lists, PV Module List, Inverter List (snapshot Oct 7, 2026).
  2. AXITEC — datasheet AXIworldbipremium bifacial 144 cells asemmbled in US.
  3. AXITEC — manufacturer datasheet “430–455 Wp AXIpremium XL HC High performance solar module”.
  4. Qcells — manufacturer datasheet “Q.PEAK DUO BLK ML-G10+ ENDURING HIGH PERFORMANCE”.
  5. AXITEC — document library on the manufacturer’s website (links above).
  6. Kiwa PVEL — PV Module Reliability Scorecard, Top Performer lists.
  7. NLR (formerly NREL) — System Advisor Model CEC inverter library (version 2026.7.3).
  8. NLR (formerly NREL) — PVWatts v8, NSRDB PSM v3 typical-year weather for Los Angeles, Palmdale, Chula Vista, Huntington Beach, Riverside, Santa Clarita.
  9. Inverter datasheets — APsystems (Alt Power System), Enphase, Solis (Ginlong), Tesla (manufacturer documents).
  10. Building permits — Los Angeles County Public Works (EPIC-LA, unincorporated areas) (Jun 2023). Equipment matched from permit descriptions by model number.
  11. Cali-Graf calculations — formulas and inputs are shown next to each calculated value (efficiency from area, temperature-corrected voltages, string sizing, energy estimates).