38.7″ · 984 mm wide

Solar panelHeliene

Heliene 72M 335

Name: Heliene 72M 335
Brand: Heliene

72 cells. Power classes 280–390 W in the CEC list.

CEC listed · Sep 21, 2020UL 1703

Power class

Power (STC)335 WCEC nameplate
Efficiency≈18.2%calculated from area
%/°C Pmax−0.461CEC listing test
PTC / STC89%PTC 298 W (CEC)

Power classes

CEC PV Module List (Oct 7, 2026) · Cali-Graf calculation · 23 models

Model	Pmax	Voc, V	Isc, A	Vmp, V	Imp, A	Efficiency	PTC
72M280	280 W	44.16	8.35	35.90	7.80	≈14.3%	251 W
72M285	285 W	44.40	8.45	36.10	7.90	≈14.6%	256 W
72M290	290 W	44.65	8.56	36.25	8.00	≈14.9%	260 W
72M295	295 W	44.77	8.67	36.40	8.10	≈15.1%	265 W
72M300	300 W	44.96	8.77	36.55	8.20	≈15.4%	269 W
72M305	305 W	45.10	8.86	36.65	8.32	≈15.6%	270 W
72M310	310 W	45.40	8.90	36.77	8.43	≈15.9%	274 W
72M315	315 W	45.31	9.16	37.19	8.53	≈17.1%	280 W
72M320	320 W	45.69	9.20	37.48	8.61	≈17.4%	284 W
72M325	325 W	46.02	9.27	37.72	8.69	≈17.7%	289 W
72M330	330 W	46.31	9.34	37.96	8.76	≈18.0%	294 W
72M335	335 W	46.64	9.41	38.21	8.83	≈18.2%	298 W
72M340	340 W	46.95	9.49	38.50	8.89	≈17.9%	308 W
72M345	345 W	47.26	9.57	38.84	8.95	≈18.1%	312 W
72M350	350 W	47.54	9.65	39.13	9.01	≈18.4%	317 W
72M355	355 W	47.82	9.68	39.42	9.07	≈18.7%	322 W
72M360	360 W	48.10	9.71	39.71	9.13	≈18.9%	326 W
72M365	365 W	48.38	9.74	39.95	9.19	≈19.2%	331 W
72M370	370 W	48.66	9.77	40.15	9.28	≈19.5%	336 W
72M-375	375 W	48.96	9.90	40.67	9.22	≈19.5%	348 W
72M-380	380 W	49.55	9.98	41.20	9.23	≈19.8%	353 W
72M-385	385 W	48.62	10.18	39.81	9.67	≈19.5%	356 W
72M-390	390 W	48.94	10.24	40.11	9.72	≈19.8%	360 W

≈ efficiency = Pmax ÷ CEC-listed area 1.95 m².

Build & dimensions

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

Dimensions78.1 × 38.7 in1,984 × 984 mm
Module area1.95 m² (21 ft²)length × width
Cells72 cells
Back coverWhite backsheet

Heat & cold behaviour

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

	CEC listing test
Pmax coefficient γ	−0.461 %/°C
Voc coefficient β	−0.340 %/°C
Isc coefficient α	+0.062 %/°C
Vmp coefficient	−0.441 %/°C
Operating cell temperature	NOCT 49 °C

Away from lab conditions — CEC listing test points

Class	Pmax at NOCT	Vmp × Imp at NOCT	Pmax at 200 W/m²	Low-light efficiency vs STC
280 W	202.1 W	32.34 V × 6.25 A	53.6 W	96%
285 W	205.9 W	32.52 V × 6.33 A	54.6 W	96%
290 W	209.3 W	32.65 V × 6.41 A	55.5 W	96%
295 W	212.8 W	32.79 V × 6.49 A	56.5 W	96%
300 W	216.3 W	32.92 V × 6.57 A	57.4 W	96%
305 W	202.2 W	30.3 V × 6.67 A	57 W	93%
310 W	205.5 W	30.4 V × 6.76 A	57.9 W	93%
315 W	228.4 W	33.34 V × 6.85 A	61.2 W	97%
320 W	232.2 W	33.6 V × 6.91 A	62.4 W	97%
325 W	235.7 W	33.82 V × 6.97 A	63.2 W	97%
330 W	239.2 W	34.03 V × 7.03 A	64.3 W	97%
335 W	242.9 W	34.26 V × 7.09 A	65.1 W	97%
340 W	252.1 W	35.07 V × 7.19 A	66.7 W	98%
345 W	256 W	35.38 V × 7.24 A	67.8 W	98%
350 W	259.7 W	35.65 V × 7.29 A	68.7 W	98%
355 W	263.4 W	35.91 V × 7.33 A	69.7 W	98%
360 W	267 W	36.17 V × 7.38 A	70.7 W	98%
365 W	270.4 W	36.39 V × 7.43 A	71.6 W	98%
370 W	274.4 W	36.57 V × 7.5 A	72.6 W	98%
375 W	276 W	37.34 V × 7.39 A	72.7 W	97%
380 W	279.9 W	37.83 V × 7.4 A	73.7 W	97%
385 W	277.8 W	37.2 V × 7.47 A	74.3 W	96%
390 W	281.3 W	37.48 V × 7.51 A	75.2 W	96%

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

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)

CityColdest air, °CHottest cell, °CString inverter

50.3 V

Voc when cold

per panel

30 V

Vmp when hot

per panel

Max panels / string

max DC 600 V

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

Inverter	Max DC input	MPPT	Window source	Panels per string
Tesla 1538000-xx-y	600 V	60–480 V	datasheet	3–11
Solis (Ginlong) S6-EH1P10K-H-US	600 V	80–520 V	datasheet	3–11
Solis (Ginlong) Solis-1P7.6K-4G-US	600 V	100–500 V	datasheet	4–11
Qcells Q.VOLT H7.6SX	498 V	234–498 V	CEC test window	8–9

Microinverters (one per panel)

Microinverter	Recommended module power	Max DC input	MPPT	Voc cold / Vmp hot	Check	DC/AC
Enphase IQ8PLUS-72-2-US	235–440 W	60 V	29–45 V	50.3 / 30 V	✓ Within range	1.16
Enphase IQ8X-80-M-US	320–540 W	79.5 V	43–60 V	50.3 / 30 V	✗ Not a match: module voltage below MPPT range	0.88
APsystems (Alt Power System) DS3-L	265–570 W	60 V	28–45 V	50.3 / 30 V	✓ Within range	0.43
Enphase IQ8M-72-2-US	260–460 W	60 V	30–45 V	50.3 / 30 V	⚠ Works; below MPPT at peak heat	1.03
Enphase IQ8A-72-2-US	295–500 W	60 V	32–45 V	50.3 / 30 V	⚠ Works; below MPPT at peak heat	0.96

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

PanelsCity for chartSystem size

City	kWh / kW / yr	kWh / panel / yr	kWh / system / yr	Sun, kWh/m²/day
Los Angeles	1,676	561	11,791	6.08
Palmdale	1,835	615	12,909	6.69
Chula Vista	1,696	568	11,931	6.11
Huntington Beach	1,643	550	11,559	5.89
Riverside	1,696	568	11,931	6.21
Santa Clarita	1,724	578	12,128	6.28

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 335 W panels

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

Panel	Pmax	Efficiency	γ Pmax (CEC)	Voc, V	Isc, A	PVEL (product / brand)	SoCal permits (series)
Heliene 72M 335	335 W	≈18.2%	−0.461	46.64	9.41	brand 5×	—
LONGi LR4-60HPB-335M	335 W	≈18.5%	−0.337	39.9	10.76	product 2021, 2022	193
JinkoSolar JKM335M-60HBL	335 W	≈19.9%	−0.406	40.8	10.73	brand 12× (2014–2026)	45
REC Group REC340AA	340 W	≈20.2%	−0.279	43.1	10.09	brand 9× (2016–2025)	30

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

ManufacturerHeliene
Listed in CEC asHeliene
Websiteheliene.com
PVEL Top Performer (manufacturer)5 Scorecards (2020–2025)
Current panel series in CEC list21

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 72M 335?

Calculated from the panel area (1.95 m²): about 18.2% for the 335 W class. 335 W over 1.95 m² equals about 172 W per square meter.

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

PVWatts v8 with typical-year weather gives about 561 kWh per year per 335 W panel in Los Angeles and about 615 kWh in Palmdale (20° roof, facing south, 14% system losses).

How much power does it lose on a hot roof?

With γ = −0.461 %/°C, at a 77 °C cell temperature (hottest modeled hour in Palmdale) output is about 23.9% 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 3–11 panels per string (Voc at 2 °C = 50.3 V, Vmp at 74 °C cell = 30 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 50.3 V vs max input 60 V; Vmp when hot 30 V vs MPPT low 29 V; recommended module power 235–440 W. Confirm on the microinverter maker’s compatibility list.

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

California Energy Commission — Solar Equipment Lists, PV Module List, Inverter List (snapshot Oct 7, 2026).
JinkoSolar — datasheet THE MOST DEPENDABLE SOLAR BRAND.
JinkoSolar — manufacturer datasheet “Eagle HC 60M G2 315-335 Watt MONO PERC HALF CELL MODULE”.
Kiwa PVEL — PV Module Reliability Scorecard, Top Performer lists 2020–2025.
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, Chula Vista, Huntington Beach, Riverside, Santa Clarita.
Inverter datasheets — APsystems (Alt Power System), Enphase, Solis (Ginlong), Tesla (manufacturer documents).
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).