Cali-GrafCali-Graf
For pros Sign in
66.1″ · 1,680 mm
39″ · 990 mm wide
Solar panelHeliene

Heliene 60M 275

60 cells. Power classes 230–325 W in the CEC list.

CEC listed · Aug 1, 2017UL 1703
Power class
  • Power (STC)275 WCEC nameplate
  • Efficiency≈17.7%calculated from area
  • %/°C Pmax−0.441CEC listing test
  • PTC / STC90.5%PTC 249 W (CEC)

Power classes

CEC PV Module List (Oct 7, 2026) · Cali-Graf calculation · 20 models
ModelPmaxVoc, VIsc, AVmp, VImp, AEfficiencyPTC
60M230230 W36.608.6029.507.80≈13.8%207 W
60M235235 W36.708.6929.757.90≈14.1%212 W
60M240240 W36.808.7030.008.00≈14.4%216 W
60M245245 W37.268.7130.038.18≈14.7%221 W
60M250250 W37.408.7230.308.22≈15.0%226 W
60M255255 W37.508.8630.658.32≈15.3%230 W
60M260260 W37.738.9030.848.43≈15.6%234 W
60M265265 W38.409.0031.178.50≈15.9%236 W
60M270270 W38.929.1031.318.71≈17.4%244 W
60M275275 W39.079.1831.628.78≈17.7%249 W
60M280280 W39.239.2631.948.85≈18.0%254 W
60M285285 W39.389.3432.248.92≈18.4%258 W
60M290290 W39.609.4232.458.99≈18.7%263 W
60M295295 W39.689.5132.849.06≈18.4%266 W
60M300300 W39.839.5933.149.13≈18.7%271 W
60M305305 W39.499.4532.519.03≈16.0%274 W
60M-310310 W39.589.9633.549.27≈18.8%282 W
60M-315315 W40.0110.2233.909.33≈19.1%287 W
60M-320320 W40.0910.0934.179.38≈19.4%292 W
60M-325325 W40.6710.1334.619.41≈19.7%296 W
≈ efficiency = Pmax ÷ CEC-listed area 1.66 m².

Build & dimensions

CEC PV Module List (Oct 7, 2026) · Cali-Graf calculation

Heat & cold behaviour

CEC PV Module List (Oct 7, 2026) · Cali-Graf calculation
CEC listing test
Pmax coefficient γ−0.441 %/°C
Voc coefficient β−0.333 %/°C
Isc coefficient α+0.062 %/°C
Vmp coefficient−0.441 %/°C
Operating cell temperatureNOCT 46.5 °C

Away from lab conditions — CEC listing test points

ClassPmax at NOCTVmp × Imp at NOCTPmax at 200 W/m²Low-light efficiency vs STC
230 W165.5 W26.83 V × 6.17 A43.9 W95%
235 W169 W27.05 V × 6.25 A44.8 W95%
240 W172.6 W27.28 V × 6.33 A45.8 W95%
245 W176.7 W27.31 V × 6.47 A46.9 W96%
250 W179.1 W27.55 V × 6.5 A47.5 W95%
255 W181.8 W27.12 V × 6.7 A48.3 W95%
260 W185.3 W27.29 V × 6.79 A49.3 W95%
265 W177.4 W26.49 V × 6.7 A50.3 W95%
270 W198.2 W28.32 V × 7 A52.7 W98%
275 W201.9 W28.6 V × 7.06 A53.6 W97%
280 W205.7 W28.89 V × 7.12 A54.7 W98%
285 W209.1 W29.16 V × 7.17 A55.5 W97%
290 W212.2 W29.35 V × 7.23 A56.2 W97%
295 W217.5 W29.74 V × 7.31 A58.3 W99%
300 W221.2 W30.02 V × 7.37 A59.3 W99%
305 W202.4 W28.35 V × 7.14 A54.2 W89%
310 W224.3 W30.17 V × 7.44 A60.6 W98%
315 W228.2 W30.49 V × 7.48 A61.7 W98%
320 W231.3 W30.74 V × 7.52 A62.5 W98%
325 W235 W31.13 V × 7.55 A63.5 W98%
Pmax = Vmp × Imp from the CEC listing; low-light efficiency = Pmax at 200 W/m² ÷ (20% of STC Pmax).

Independent reliability testing

Kiwa PVEL Scorecard
5
PVEL Scorecards
Heliene named Top Performer, 2020–2025
This exact series is not listed in published PVEL Top Performer tables. Results below are for the manufacturer.

Inverter compatibility & string sizing

CEC PV Module List (Oct 7, 2026) · NLR PVWatts v8 · inverter datasheets · NLR SAM inverter library · CEC Grid Support Inverter List (Oct 7, 2026)
42.1 V
Voc when cold
per panel
24.8 V
Vmp when hot
per panel
14
Max panels / string
max DC 600 V
3
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 Vdatasheet3–14
Solis (Ginlong) S6-EH1P10K-H-US600 V80–520 Vdatasheet4–14
Solis (Ginlong) Solis-1P7.6K-4G-US600 V100–500 Vdatasheet5–14
Qcells Q.VOLT H7.6SX498 V234–498 VCEC test window10–11

Microinverters (one per panel)

MicroinverterRecommended module powerMax DC inputMPPTVoc cold / Vmp hotCheckDC/AC
Enphase IQ8PLUS-72-2-US235–440 W60 V29–45 V42.1 / 24.8 V⚠ Works; below MPPT at peak heat0.95
APsystems (Alt Power System) DS3-L265–570 W60 V28–45 V42.1 / 24.8 V⚠ Works; below MPPT at peak heat0.35
Enphase IQ8M-72-2-US260–460 W60 V30–45 V42.1 / 24.8 V⚠ Works; below MPPT at peak heat0.85
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 Angeles1,67646111,5226.08
Palmdale1,83550512,6166.69
Chula Vista1,69646611,6606.11
Huntington Beach1,64345211,2965.89
Riverside1,69646611,6606.21
Santa Clarita1,72447411,8526.28
752Jan753Feb966Mar1,067Apr1,054May1,120Jun1,180Jul1,194Aug1,044Sep921Oct791Nov685DeckWh 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 275 W panels

CEC PV Module List (Oct 7, 2026) · datasheets · Kiwa PVEL Scorecard
PanelPmaxEfficiencyγ Pmax (CEC)Voc, VIsc, ASizePVEL (product / brand)
Heliene 60M 275275 W≈17.7%−0.44139.079.1866.1 inbrand 5×
Hyundai Energy Solutions HiS-C275RG(BK)275 W≥17%−0.38238.189.1564.6 × 39.3 inbrand 5× (2017–2025)
ZNShine Solar ZXM6-72-275/M275 W≈13.8%−0.52444.648.4478.1 × 39.4 inbrand 8× (2016–2026)
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 Heliene

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

Other series by SoCal permits

108HC-xxx M10 SL · 1108HC-xxx M10 NTYP SL Bifacial144HC-xxx M10 NTYP SL Bifacial156HC-xxx M10 NTYP SL Bifacial108HC-xxx M10 NTYP SL144HC-xxx M10 SL Bifacial

Questions & answers

How efficient is the Heliene 60M 275?

Calculated from the panel area (1.66 m²): about 17.7% for the 275 W class. 275 W over 1.66 m² equals about 165 W per square meter.

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

PVWatts v8 with typical-year weather gives about 461 kWh per year per 275 W panel in Los Angeles and about 505 kWh in Palmdale (20° roof, facing south, 14% system losses).

How much power does it lose on a hot roof?

With γ = −0.441 %/°C, at a 77 °C cell temperature (hottest modeled hour in Palmdale) output is about 22.8% 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 3–14 panels per string (Voc at 2 °C = 42.1 V, Vmp at 74 °C cell = 24.8 V). Final design must follow the inverter manual and NEC 690.7.

Has this panel been reliability-tested?

This exact series is not in published PVEL Top Performer tables; Heliene was named a Top Performer in 5 Scorecards (2020–2025).

Sources

  1. California Energy Commission — Solar Equipment Lists, PV Module List, Inverter List (snapshot Oct 7, 2026).
  2. Hyundai Energy Solutions — datasheet [Customized Module] RG(BK) Series (PERC) 265~285W.
  3. ZNShine Solar — manufacturer datasheet “ZXM6-72 Series Znshinesolar 5BB Monocrystalline PV Module”.
  4. Kiwa PVEL — PV Module Reliability Scorecard, Top Performer lists 2020–2025.
  5. NLR (formerly NREL) — System Advisor Model CEC inverter library (version 2026.7.3).
  6. NLR (formerly NREL) — PVWatts v8, NSRDB PSM v3 typical-year weather for Los Angeles, Palmdale, Chula Vista, Huntington Beach, Riverside, Santa Clarita.
  7. Inverter datasheets — APsystems (Alt Power System), Enphase, Solis (Ginlong), Tesla (manufacturer documents).
  8. Building permits — Southern California permit portals. Equipment matched from permit descriptions.
  9. Cali-Graf calculations — formulas and inputs are shown next to each calculated value (efficiency from area, temperature-corrected voltages, string sizing, energy estimates).