Illustration · 156 half-cut cells

Solar panelHyundai Energy Solutions

Hyundai Energy Solutions HiS-T635NJ

Name: Hyundai Energy Solutions HiS-T635NJ
Brand: Hyundai Energy Solutions

156 half-cut cells, N-type TOPCon. Power classes 615–645 W in the CEC list.

CEC listed · May 21, 2025UL 6173012-yr product + 30-yr performance warrantyN-type TOPCon

Power class

Power (STC)635 WCEC nameplate
Efficiency≈23.0%calculated from area
%/°C Pmax−0.29CEC test: −0.294
Output at year 3087.4%performance warranty

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
HiS-T615NJ	615 W	56.74	13.67	46.90	13.12	≈22.3%	581 W	May 21, 2025
HiS-T620NJ	620 W	56.95	13.75	47.07	13.18	≈22.5%	586 W	May 21, 2025
HiS-T625NJ	625 W	57.15	13.82	47.24	13.24	≈22.6%	591 W	May 21, 2025
HiS-T630NJ	630 W	57.36	13.90	47.41	13.29	≈22.8%	596 W	May 21, 2025
HiS-T635NJ	635 W	57.56	13.98	47.57	13.35	≈23.0%	601 W	May 21, 2025
HiS-T640NJ	640 W	57.77	14.06	47.74	13.41	≈23.2%	606 W	May 21, 2025
HiS-T645NJ	645 W	57.97	14.14	47.90	13.47	≈23.4%	610 W	May 21, 2025

≈ efficiency = Pmax ÷ CEC-listed area 2.76 m².

Build & dimensions

CEC PV Module List (Oct 7, 2026) · Hyundai Energy Solutions datasheet

Module area2.76 m² (29.7 ft²)CEC-listed area
Weight76.5 lb (34.7 kg)
Cells156 half-cut cellsN-type TOPCon
Back coverGlass (dual-glass module)
FrameAnodized aluminum alloy
Junction box3-part, 3 bypass diodes, IP68 rated
Cable / connector(+)1,400mm(55.1in), (-)1,400mm(55.1in) · Stäubli MC4 genuine Connector / IP68

Heat & cold behaviour

Hyundai Energy Solutions datasheet · CEC PV Module List (Oct 7, 2026) · Cali-Graf calculation

	Datasheet	CEC listing test
Pmax coefficient γ	−0.29 %/°C	−0.294 %/°C
Voc coefficient β	−0.25 %/°C	−0.233 %/°C
Isc coefficient α	+0.04 %/°C	+0.030 %/°C
Vmp coefficient	≈ −0.33 %/°C	—
Operating cell temperature	—	NOCT 45.1 °C

Vmp coefficient ≈ γ − α (datasheet); 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
615 W	466.9 W	45.15 V × 10.34 A	117.7 W	96%
620 W	470.8 W	45.31 V × 10.39 A	118.7 W	96%
625 W	474.6 W	45.47 V × 10.44 A	119.7 W	96%
630 W	478.1 W	45.64 V × 10.48 A	120.6 W	96%
635 W	481.9 W	45.79 V × 10.52 A	121.5 W	96%
640 W	485.8 W	45.95 V × 10.57 A	122.5 W	96%
645 W	489.6 W	46.11 V × 10.62 A	123.5 W	96%

Pmax = Vmp × Imp from the CEC listing; low-light efficiency = Pmax at 200 W/m² ÷ (20% of STC Pmax).

Electrical & strength ratings

Hyundai Energy Solutions datasheet

Max system voltage1,500 V
Max reverse current30 A
Fire rating (UL 61730)Type 29
Module temperature−40 °F to +185 °F−40 °C to +85 °C

Packaging: 36 per pallet

Certifications

CEC PV Module List (Oct 7, 2026) · Hyundai Energy Solutions datasheet

UL 61730IEC 61215IEC 61730Fire rating Type 29 (UL 61730)ISO 14001ISO 45001ISO 9001

UL 61730CEC listing
IEC 61215datasheet
IEC 61730datasheet
Fire rating Type 29 (UL 61730)datasheet
ISO 14001factory, datasheet
ISO 45001factory, datasheet
ISO 9001factory, datasheet

Warranty & degradation

Hyundai Energy Solutions datasheet

Product warranty12 years
Performance warranty30 years
Year 1≥ 99%
Year 30≥ 87.4%

Independent reliability testing

Kiwa PVEL Scorecard

PVEL Scorecards

Hyundai Energy Solutions named Top Performer, 2017–2025

This exact series is not listed in published PVEL Top Performer tables. Results below are for the manufacturer.

Inverter compatibility & string sizing

Hyundai Energy Solutions 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)

CityColdest air, °CHottest cell, °CString inverter

60.9 V

Voc when cold

per panel

39.8 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.

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	2–9
Solis (Ginlong) S6-EH1P10K-H-US	600 V	80–520 V	datasheet	3–9
Solis (Ginlong) Solis-1P7.6K-4G-US	600 V	100–500 V	datasheet	3–9
Qcells Q.VOLT H7.6SX	498 V	234–498 V	CEC test window	6–8

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	1,064	11,707	6.08
Palmdale	1,835	1,165	12,817	6.69
Chula Vista	1,696	1,077	11,847	6.11
Huntington Beach	1,643	1,043	11,476	5.89
Riverside	1,696	1,077	11,847	6.21
Santa Clarita	1,724	1,095	12,042	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 635 W panels

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

Panel	Pmax	Efficiency	γ Pmax (CEC)	Voc, V	Isc, A	Warranty	PVEL (product / brand)
Hyundai Energy Solutions HiS-T635NJ	635 W	≈23%	−0.294	57.56	13.98	12 / 30 yr	brand 5×
Canadian Solar CS7N-635MB-AG	635 W	≈20.7%	−0.390	44.4	18.27	—	product 2024
Waaree BiN-02-635	635 W	≥22.4%	−0.295	43.74	18.3	12 / 30 yr	brand 5× (2022–2026)
JinkoSolar JKM635N-66HL4M-BDV	635 W	≈23.5%	−0.299	49.68	16.26	12 / 30 yr	product 2025

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
[US] NJ(HiS) Series (N TOPCon Bifacial) 635~645W
Datasheet · HD Hyundai Energy Solutions
PDF
[Customized Module] TI Series(PERC) 290~315W
Warranty · HD Hyundai Energy Solutions

About Hyundai Energy Solutions

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

ManufacturerHyundai Energy Solutions
Listed in CEC asHD HYUNDAI ENERGY SOLUTIONS CO., LTD., HYUNDAI ENERGY SOLUTIONS CO., LTD.
Websitehd-hyundaies.co.kr
PVEL Top Performer (manufacturer)5 Scorecards (2017–2025)
Current panel series in CEC list36

Other series by SoCal permits

HiN-TxxxNF(BK) · 37HiS-SxxxYH(BK) · 14HiS-TxxxNF(BK) · 8HiA-SxxxHG · 1HiS-CxxxRG(BK)HiN-TxxxNI

Questions & answers

How efficient is the Hyundai Energy Solutions HiS-T635NJ?

Calculated from the panel area (2.76 m²): about 23% for the 635 W class. 635 W over 2.76 m² equals about 230 W per square meter.

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

PVWatts v8 with typical-year weather gives about 1,064 kWh per year per 635 W panel in Los Angeles and about 1,165 kWh in Palmdale (20° roof, facing south, 14% system losses).

How much power does it lose on a hot roof?

With γ = −0.29 %/°C, at a 77 °C cell temperature (hottest modeled hour in Palmdale) output is about 15% 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 2–9 panels per string (Voc at 2 °C = 60.9 V, Vmp at 74 °C cell = 39.8 V). Final design must follow the inverter manual and NEC 690.7.

What does the warranty cover?

12 years on the product and 30 years on performance: at least 87.4% after 30 years (manufacturer datasheet).

Has this panel been reliability-tested?

This exact series is not in published PVEL Top Performer tables; Hyundai Energy Solutions was named a Top Performer in 5 Scorecards (2017–2025).

What fire rating does it have?

UL 61730 fire rating Type 29 per datasheet.

Sources

California Energy Commission — Solar Equipment Lists, PV Module List, Inverter List (snapshot Oct 7, 2026).
Hyundai Energy Solutions — datasheet [US] NJ(HiS) Series (N TOPCon Bifacial) 635~645W.
Waaree — datasheet ELITE SERIES BiN-02.
JinkoSolar — datasheet THE MOST DEPENDABLE SOLAR PRODUCT.
Hyundai Energy Solutions — document library on the manufacturer’s website (links above).
Kiwa PVEL — PV Module Reliability Scorecard, Top Performer lists 2017–2025.
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 — 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).