Illustration · 156 half-cut cells

Solar panelHeliene

Heliene 156HC-580 M10 SL Bifacial

Name: Heliene 156HC-580 M10 SL Bifacial
Brand: Heliene

156 half-cut cells, bifacial. Power classes 565–595 W in the CEC list.

CEC listed · Mar 21, 2023UL 61730BifacialPVEL Top Performer 2023, 2024

Power class

Power (STC)580 WCEC nameplate
Efficiency≈20.8%calculated from area
%/°C Pmax−0.335CEC listing test
PTC / STC94.2%PTC 546 W (CEC)

Power classes

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

Model	Pmax	Voc, V	Isc, A	Vmp, V	Imp, A	Efficiency	PTC	CEC listed
156HC-565 M10 SL Bifacial	565 W	53.32	13.42	45.02	12.52	≈20.2%	532 W	Mar 21, 2023
156HC-570 M10 SL Bifacial	570 W	53.59	13.44	45.23	12.58	≈20.4%	537 W	Mar 21, 2023
156HC-575 M10 SL Bifacial	575 W	53.86	13.46	45.44	12.64	≈20.6%	542 W	Mar 21, 2023
156HC-580 M10 SL Bifacial	580 W	54.13	13.48	45.64	12.70	≈20.8%	546 W	Mar 21, 2023
156HC-585 M10 SL Bifacial	585 W	54.41	13.50	45.85	12.77	≈21.0%	551 W	Mar 21, 2023
156HC-590 M10 SL Bifacial	590 W	54.50	13.52	46.06	12.83	≈21.1%	556 W	Mar 21, 2025
156HC-595 M10 SL Bifacial	595 W	54.59	13.54	46.26	12.86	≈21.3%	561 W	Mar 21, 2025

≈ efficiency = Pmax ÷ CEC-listed area 2.79 m².

Heat & cold behaviour

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

	CEC listing test
Pmax coefficient γ	−0.335 %/°C
Voc coefficient β	−0.254 %/°C
Isc coefficient α	+0.042 %/°C
Operating cell temperature	NOCT 43.2 °C

Vmp coefficient ≈ γ − α (CEC); used only for the hot-roof voltage estimate.

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
565 W	417.1 W	41.75 V × 9.99 A	109.9 W	97%
570 W	421.1 W	41.94 V × 10.04 A	110.9 W	97%
575 W	425 W	42.13 V × 10.09 A	112 W	97%
580 W	428.9 W	42.32 V × 10.14 A	113 W	97%
585 W	433.3 W	42.52 V × 10.19 A	114.1 W	98%
590 W	437.3 W	42.71 V × 10.24 A	115.2 W	98%
595 W	440.2 W	42.9 V × 10.26 A	116 W	97%

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

2023, 2024

PVEL Top Performer

this series

Tests passed as Top Performer

HSS, LID+LETID, PID

PVEL Scorecards

Heliene named Top Performer, 2020–2025

PVEL Top Performer tests

Year	Product	Tests
2023	156HC-M10-SL-Bifacial	LID+LETIDPID
2024	156HC-M10-SL-Bifacial	HSSLID+LETIDPID
2024	156HC-M10-SL (closely related product name)	HSSLID+LETIDPID

Tested bill of materials

PVEL-tested factoryChina
Cell technology (tested BOM)p-type PERC
Module design (tested BOM)bifacial - glass//backsheet
Power class range tested580-625W
Hail test ice ball50 mm

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

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)

CityColdest air, °CHottest cell, °CString inverter

57.3 V

Voc when cold

per panel

37.2 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	2–10
Solis (Ginlong) S6-EH1P10K-H-US	600 V	80–520 V	datasheet	3–10
Solis (Ginlong) Solis-1P7.6K-4G-US	600 V	100–500 V	datasheet	3–10
Qcells Q.VOLT H7.6SX	498 V	234–498 V	CEC test window	7–8

Microinverters (one per panel)

No microinverter in the reference set lists this power class in its recommended module power range.

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	972	11,665	6.08
Palmdale	1,835	1,064	12,772	6.69
Chula Vista	1,696	984	11,804	6.11
Huntington Beach	1,643	953	11,435	5.89
Riverside	1,696	984	11,804	6.21
Santa Clarita	1,724	1,000	11,999	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 580 W panels

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

Panel	Pmax	Efficiency	γ Pmax (CEC)	Voc, V	Isc, A	PVEL (product / brand)	SoCal permits (series)
Heliene 156HC-580 M10 SL Bifacial	580 W	≈20.8%	−0.335	54.13	13.48	product 2023, 2024	—
ZNShine Solar ZXM7-UHLDD144-580/N	580 W	≈22.7%	−0.281	51.5	14.35	product 2024, 2025, 2026	1
VSUN (Vietnam Sunergy) VSUN580N-144MH	580 W	≈22.5%	−0.309	52.02	13.83	brand 6× (2021–2026)	1
Phono Solar PS580M8GFH-24/TNH	580 W	≈22.7%	−0.293	52.7	13.66	product 2024, 2025	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.

Documents

manufacturer documents

PDF
PERC Cell
Datasheet · Heliene · Jun 2026

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 156HC-580 M10 SL Bifacial?

Calculated from the panel area (2.79 m²): about 20.8% for the 580 W class. 580 W over 2.79 m² equals about 208 W per square meter.

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

PVWatts v8 with typical-year weather gives about 972 kWh per year per 580 W panel in Los Angeles and about 1,064 kWh in Palmdale (20° roof, facing south, 14% system losses).

How much power does it lose on a hot roof?

With γ = −0.335 %/°C, at a 77 °C cell temperature (hottest modeled hour in Palmdale) output is about 17.4% 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 2–10 panels per string (Voc at 2 °C = 57.3 V, Vmp at 74 °C cell = 37.2 V). Final design must follow the inverter manual and NEC 690.7.

Is it bifacial?

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

Has this panel been reliability-tested?

156HC-M10-SL-Bifacial was a PVEL Top Performer in 2023, 2024 (HSS, LID+LETID, PID).

Sources

California Energy Commission — Solar Equipment Lists, PV Module List, Inverter List (snapshot Oct 7, 2026).
Heliene — document library on the manufacturer’s website (links above).
Kiwa PVEL — PV Module Reliability Scorecard, Top Performer lists 2020–2025.
NLR (formerly NREL) — System Advisor Model CEC module and inverter libraries (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 — 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).