Illustration · 144 half-cut cells

Solar panelHyundai Energy Solutions

Hyundai Energy Solutions HiG-S450XI

Name: Hyundai Energy Solutions HiG-S450XI
Brand: Hyundai Energy Solutions

144 half-cut cells. Power classes 430–470 W in the CEC list.

CEC listed · Sep 21, 2021UL 61730

Power class

Power (STC)450 WCEC nameplate
Efficiency≈20.5%calculated from area
%/°C Pmax−0.373CEC listing test
PTC / STC92.9%PTC 418 W (CEC)

Power classes

CEC PV Module List (Oct 7, 2026) · Cali-Graf calculation · 9 models

Model	Pmax	Voc, V	Isc, A	Vmp, V	Imp, A	Efficiency	PTC	CEC listed
HiG-S430XI	430 W	49.20	11.19	40.60	10.60	≈19.6%	399 W	Sep 21, 2021
HiG-S435XI	435 W	49.40	11.26	40.80	10.67	≈19.9%	404 W	Sep 21, 2021
HiG-S440XI	440 W	49.60	11.34	41.00	10.74	≈20.1%	408 W	Sep 21, 2021
HiG-S445XI	445 W	49.80	11.42	41.20	10.81	≈20.3%	413 W	Sep 21, 2021
HiG-S450XI	450 W	50.00	11.50	41.40	10.87	≈20.5%	418 W	Sep 21, 2021
HiG-S455XI	455 W	50.20	11.59	41.60	10.94	≈20.8%	423 W	Sep 21, 2021
HiG-S460XI	460 W	50.40	11.67	41.80	11.01	≈21.0%	428 W	Sep 21, 2021
HiG-S465XI	465 W	50.60	11.74	42.00	11.08	≈21.2%	432 W	Sep 21, 2021
HiG-S470XI	470 W	50.80	11.81	42.20	11.14	≈21.5%	437 W	Sep 21, 2021

≈ efficiency = Pmax ÷ CEC-listed area 2.19 m².

Build & dimensions

CEC PV Module List (Oct 7, 2026)

Module area2.19 m² (23.6 ft²)CEC-listed area
Cells144 half-cut cells
Back coverWhite backsheet
FrameSilver frame

Heat & cold behaviour

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

	CEC listing test
Pmax coefficient γ	−0.373 %/°C
Voc coefficient β	−0.298 %/°C
Isc coefficient α	+0.047 %/°C
Operating cell temperature	NOCT 45 °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
430 W	322 W	37.95 V × 8.48 A	84.8 W	99%
435 W	325.7 W	38.14 V × 8.54 A	85.8 W	99%
440 W	329.4 W	38.33 V × 8.6 A	86.8 W	99%
445 W	333.2 W	38.51 V × 8.65 A	87.7 W	99%
450 W	336.7 W	38.7 V × 8.7 A	88.7 W	99%
455 W	340.5 W	38.89 V × 8.76 A	89.7 W	99%
460 W	344.3 W	39.07 V × 8.81 A	90.7 W	99%
465 W	348.2 W	39.26 V × 8.87 A	91.7 W	99%
470 W	351.7 W	39.45 V × 8.92 A	92.6 W	99%

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

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

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

53.4 V

Voc when cold

per panel

32.9 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	2–11
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 IQ8X-80-M-US	320–540 W	79.5 V	43–60 V	53.4 / 32.9 V	✗ Not a match: module voltage below MPPT range	1.18
APsystems (Alt Power System) DS3-L	265–570 W	60 V	28–45 V	53.4 / 32.9 V	✓ Within range	0.58
Enphase IQ8M-72-2-US	260–460 W	60 V	30–45 V	53.4 / 32.9 V	✓ Within range	1.38
Enphase IQ8A-72-2-US	295–500 W	60 V	32–45 V	53.4 / 32.9 V	✓ Within range	1.29

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	754	12,067	6.08
Palmdale	1,835	826	13,212	6.69
Chula Vista	1,696	763	12,211	6.11
Huntington Beach	1,643	739	11,830	5.89
Riverside	1,696	763	12,211	6.21
Santa Clarita	1,724	776	12,413	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 450 W panels

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

Panel	Pmax	Efficiency	γ Pmax (CEC)	Voc, V	Isc, A	PVEL (product / brand)	SoCal permits (series)
Hyundai Energy Solutions HiG-S450XI	450 W	≈20.5%	−0.373	50	11.5	brand 5×	—
Qcells Q.TRON BLK M-G2+ 445	445 W	≈22.8%	−0.276	40.16	13.98	brand 11× (2016–2026)	40
REC Group REC450AA Pure-RX	450 W	≈22.3%	−0.248	65.1	8.81	brand 9× (2016–2025)	33
Aptos Solar DNA-120-MF10-450W	450 W	≥20.8%	−0.355	41.18	13.85	—	22

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 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 HiG-S450XI?

Calculated from the panel area (2.19 m²): about 20.5% for the 450 W class. 450 W over 2.19 m² equals about 205 W per square meter.

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

PVWatts v8 with typical-year weather gives about 754 kWh per year per 450 W panel in Los Angeles and about 826 kWh in Palmdale (20° roof, facing south, 14% system losses).

How much power does it lose on a hot roof?

With γ = −0.373 %/°C, at a 77 °C cell temperature (hottest modeled hour in Palmdale) output is about 19.3% 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 = 53.4 V, Vmp at 74 °C cell = 32.9 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 53.4 V vs max input 60 V; Vmp when hot 32.9 V vs MPPT low 28 V; recommended module power 265–570 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; Hyundai Energy Solutions was named a Top Performer in 5 Scorecards (2017–2025).

Sources

California Energy Commission — Solar Equipment Lists, PV Module List, Inverter List (snapshot Oct 7, 2026).
Qcells — manufacturer datasheet “Q.TRON BLK M-G2+ SERIES 415–440 Wp”.
Aptos Solar — datasheet Legacy Products.
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 — 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).