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Illustration · 144 half-cut cells
Solar panelJA Solar

JA Solar JAM72D30-540/MB

144 half-cut cells, bifacial. Power classes 530–550 W in the CEC list.

CEC listed · May 11, 2021UL 61730BifacialPVEL Top Performer 2023, 2024Installed in 3 SoCal permits
Power class
  • Power (STC)540 WCEC nameplate
  • Efficiency≈21.4%calculated from area
  • %/°C Pmax−0.330CEC listing test
  • PTC / STC93.9%PTC 507 W (CEC)

Power classes

CEC PV Module List (Oct 7, 2026) · Cali-Graf calculation · 5 models
ModelPmaxVoc, VIsc, AVmp, VImp, AEfficiencyPTCCEC listed
JAM72D30-530/MB530 W49.3013.7241.3112.83≈21.0%497 WJun 21, 2021
JAM72D30-535/MB535 W49.4513.7941.4712.90≈21.2%502 WMay 11, 2021
JAM72D30-540/MB540 W49.6013.8641.6412.97≈21.4%507 WMay 11, 2021
JAM72D30-545/MB545 W49.7513.9341.8013.04≈21.6%512 WMay 11, 2021
JAM72D30-550/MB550 W49.9014.0041.9613.11≈21.8%516 WAug 21, 2023
≈ efficiency = Pmax ÷ CEC-listed area 2.52 m².

Heat & cold behaviour

CEC PV Module List (Oct 7, 2026) · Cali-Graf calculation
CEC listing test
Pmax coefficient γ−0.330 %/°C
Voc coefficient β−0.261 %/°C
Isc coefficient α+0.039 %/°C
Operating cell temperatureNOCT 44.8 °C
Vmp coefficient ≈ γ − α (CEC); 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
530 W397.3 W39.03 V × 10.18 A101.1 W95%
535 W401 W39.18 V × 10.24 A102.1 W95%
540 W404.9 W39.34 V × 10.29 A103.1 W95%
545 W408.6 W39.49 V × 10.35 A104 W95%
550 W412.4 W39.64 V × 10.4 A105 W95%
Pmax = Vmp × Imp from the CEC listing; low-light efficiency = Pmax at 200 W/m² ÷ (20% of STC Pmax).

Certifications

CEC PV Module List (Oct 7, 2026) · Clean Energy Council (Australia)
UL 61730IEC 61215:2021 / IEC 61730:2023

Independent reliability testing

Kiwa PVEL Scorecard · RETC PV Module Index
2023, 2024
PVEL Top Performer
this series
3
Tests passed as Top Performer
DH, LID+LETID, MSS
11
PVEL Scorecards
JA Solar named Top Performer, 2014–2026
2023, 2024, 2025, 2026
RETC Overall Highest Achiever
JA Solar, manufacturer level

PVEL Top Performer tests

YearProductTests
2023JAM72D30-xxx/MBDHLID+LETIDMSS
2024JAM72D30-xxx/MBLID+LETID

Tested bill of materials

Details describe the tested sample, not every module of the series.

RETC PV Module Index — JA Solar

YearRecognition
2023Overall Highest Achiever; High Achievement in Performance (Ptc-to-stc ratio, Pan file performance, Module efficiency, LeTID RESISTANCE); High Achievement in Quality (Hail durability test, Thresher test); High Achievement in Reliability (Thermal cycle test, SDML, Pid resistance, Damp heat test)
2024Overall Highest Achiever
2025Overall Highest Achiever
2026Overall Highest Achiever; High achievement in performance; High achievement in reliability; Performance discipline high achiever (Conversion efficiency, Iam, Letid, Lid, PAN file, PTC-to-STC, Temperature coefficient); Quality discipline high achiever (BOM verification); Reliability discipline high achiever (Damp heat, Pid, Sdml, Tc)

Inverter compatibility & string sizing

CEC PV Module List (Oct 7, 2026) · Cali-Graf calculation · NLR PVWatts v8 · inverter datasheets · NLR SAM inverter library · CEC Grid Support Inverter List (Oct 7, 2026)
52.6 V
Voc when cold
per panel
34.1 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. β is the CEC-measured coefficient; NEC 690.7 calculations use the datasheet value.

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 Vdatasheet3–11
Qcells Q.VOLT H7.6SX498 V234–498 VCEC test window7–9

Microinverters (one per panel)

MicroinverterRecommended module powerMax DC inputMPPTVoc cold / Vmp hotCheckDC/AC
Enphase IQ8X-80-M-US320–540 W79.5 V43–60 V52.6 / 34.1 V✗ Not a match: module voltage below MPPT range1.42
APsystems (Alt Power System) DS3-L265–570 W60 V28–45 V52.6 / 34.1 V✓ Within range0.69
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 Angeles1,67690511,7666.08
Palmdale1,83599112,8826.69
Chula Vista1,69691611,9066.11
Huntington Beach1,64388711,5345.89
Riverside1,69691611,9066.21
Santa Clarita1,72493112,1026.28
768Jan769Feb986Mar1,090Apr1,076May1,144Jun1,205Jul1,219Aug1,066Sep940Oct808Nov699DeckWh 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.

Who installs JAM72D30-xxx/MB panels in SoCal

building permits
3
Permits naming this series
Aug 2024 – Feb 2025
1
Jurisdictions so far
LA County (unincorp.) (3)

Power class named in permit

540 W
2
545 W
1
Only installer and ZIP level is shown — no homeowner names, street addresses or permit numbers. Permits from LA County (unincorp.) come without a contractor license, so they count toward totals but not toward installers. Counts grow as more permit portals are loaded.

Compare with similar 540 W panels

CEC PV Module List (Oct 7, 2026) · datasheets · Kiwa PVEL Scorecard · building permits
PanelPmaxEfficiencyγ Pmax (CEC)Voc, VIsc, APVEL (product / brand)SoCal permits (series)
JA Solar JAM72D30-540/MB540 W≈21.4%−0.33049.613.86product 2023, 20243
Canadian Solar CS6W-540MB-AG540 W≈21%−0.32449.213.9product 20241
LONGi LR5-72HBD-540M540 W≥21.1%−0.35449.513.85product 20261
AXITEC AC-540MH/144V540 W≥20.9%−0.36649.613.86—1
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.

About JA Solar

CEC PV Module List (Oct 7, 2026) · Kiwa PVEL Scorecard · RETC PV Module Index · building permits

Other series by SoCal permits

JAM54S31-xxx/MR · 152JAM54D41-xxx/MB · 17JAM54S30-xxx/MR · 1JAM66D45-xxx/LBJAM54D30-xxx/MBJAM72D40-xxx/MB

Questions & answers

How efficient is the JA Solar JAM72D30-540/MB?

Calculated from the panel area (2.52 m²): about 21.4% for the 540 W class. 540 W over 2.52 m² equals about 214 W per square meter.

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

PVWatts v8 with typical-year weather gives about 905 kWh per year per 540 W panel in Los Angeles and about 991 kWh in Palmdale (20° roof, facing south, 14% system losses).

How much power does it lose on a hot roof?

With γ = −0.330 %/°C, at a 77 °C cell temperature (hottest modeled hour in Palmdale) output is about 17.1% 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 = 52.6 V, Vmp at 74 °C cell = 34.1 V). Final design must follow the inverter manual and NEC 690.7.

Does it work with APsystems (Alt Power System) DS3-L microinverters?

Voltage check against the APsystems (Alt Power System) datasheet: Voc when cold 52.6 V vs max input 60 V; Vmp when hot 34.1 V vs MPPT low 28 V; recommended module power 265–570 W. Confirm on the microinverter maker’s compatibility list.

Is it bifacial?

Yes. Rear gain depends on mounting height and ground reflectance.

Has this panel been reliability-tested?

JAM72D30-xxx/MB was a PVEL Top Performer in 2023, 2024 (DH, LID+LETID, MSS).

Sources

  1. California Energy Commission — Solar Equipment Lists, PV Module List, Inverter List (snapshot Oct 7, 2026).
  2. Canadian Solar — datasheet BiHiKu6 BIFACIAL MONO PERC CS6W-520|525|530|535|540|545|550MB-AG.
  3. LONGi — manufacturer datasheet “LR5-72HBD Suitable for distributed projects Advanced module technology delivers superior”.
  4. AXITEC — datasheet AXIworldbipremium bifacial 144 cells asemmbled in US.
  5. Kiwa PVEL — PV Module Reliability Scorecard, Top Performer lists 2014–2026.
  6. RETC — PV Module Index reports 2023–2026.
  7. NLR (formerly NREL) — System Advisor Model CEC module and inverter libraries (version 2026.7.3).
  8. Clean Energy Council (Australia) — Approved PV modules list (as of Oct 8, 2026).
  9. NLR (formerly NREL) — PVWatts v8, NSRDB PSM v3 typical-year weather for Los Angeles, Palmdale, Chula Vista, Huntington Beach, Riverside, Santa Clarita.
  10. Inverter datasheets — APsystems (Alt Power System), Enphase, Solis (Ginlong), Tesla (manufacturer documents).
  11. Building permits — Los Angeles County Public Works (EPIC-LA, unincorporated areas) (Aug 2024 – Feb 2025). Equipment matched from permit descriptions by model number.
  12. Cali-Graf calculations — formulas and inputs are shown next to each calculated value (efficiency from area, temperature-corrected voltages, string sizing, energy estimates).