44.6″ · 1,134 mm wide · 1.38″ (35 mm) frame · 46.3 lb (21 kg)

Solar panelJinkoSolar

JinkoSolar JKM425N-54HL4-B

Name: JinkoSolar JKM425N-54HL4-B
Brand: JinkoSolar

108 half-cut cells, N-type TOPCon. Power classes 380–440 W in the CEC list.

CEC listed · Jul 21, 2022UL 6173025-yr product + 30-yr performance warrantyPVEL Top Performer 2023, 2024, 2025, 2026N-type TOPConInstalled in 10 SoCal permits

Power class

Power (STC)425 Wtolerance +3 / −0 %
Efficiency≈21.8%calculated from area
%/°C Pmax−0.29CEC test: −0.308
Output at year 3087.4%performance warranty

Power classes

CEC PV Module List (Oct 7, 2026) · Cali-Graf calculation · 13 models

Model	Pmax	Voc, V	Isc, A	Vmp, V	Imp, A	Efficiency	PTC	CEC listed
JKM380N-54HL4-B	380 W	36.58	13.23	30.48	12.47	≈19.5%	360 W	Jul 21, 2022
JKM385N-54HL4-B	385 W	36.78	13.31	30.68	12.55	≈19.7%	364 W	Jul 21, 2022
JKM390N-54HL4-B	390 W	36.98	13.39	30.88	12.63	≈20.0%	369 W	Jul 21, 2022
JKM395N-54HL4-B	395 W	37.18	13.47	31.08	12.71	≈20.2%	374 W	Jul 21, 2022
JKM400N-54HL4-B	400 W	37.38	13.55	31.28	12.79	≈20.5%	379 W	Jul 21, 2022
JKM405N-54HL4-B	405 W	38.10	13.30	31.52	12.85	≈20.7%	379 W	Jul 21, 2022
JKM410N-54HL4-B	410 W	38.32	13.37	31.74	12.92	≈21.0%	384 W	Jul 21, 2022
JKM415N-54HL4-B	415 W	38.53	13.44	31.95	12.99	≈21.3%	388 W	Jul 21, 2022
JKM420N-54HL4-B	420 W	38.74	13.51	32.16	13.06	≈21.5%	393 W	Jul 21, 2022
JKM425N-54HL4-B	425 W	38.95	13.58	32.37	13.13	≈21.8%	398 W	Dec 12, 2022
JKM430N-54HL4-B	430 W	39.16	13.65	32.58	13.20	≈22.0%	403 W	Dec 12, 2022
JKM435N-54HL4-B	435 W	39.36	13.72	32.78	13.27	≈22.3%	408 W	Sep 11, 2023
JKM440N-54HL4-B	440 W	39.57	13.80	32.99	13.34	≈22.5%	413 W	Sep 11, 2023

≈ efficiency = Pmax ÷ panel area 1.953 m² (datasheet size).

Build & dimensions

JinkoSolar datasheets · Cali-Graf calculation

Dimensions67.8 × 44.6 × 1.38 in1,722 × 1,134 × 35 mm
Module area1.95 m² (21 ft²)length × width
Weight46.3 lb (21 kg)
Cells108 half-cut cellsN-type TOPCon
Front glass3.2mm, 350
FrameAnodized210Aluminum Alloy
Junction boxIP68 Rated
Cable / connector12 AWG, 1400mm

Heat & cold behaviour

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

	Datasheet	CEC listing test
Pmax coefficient γ	−0.29 %/°C	−0.308 %/°C
Voc coefficient β	−0.25 %/°C	−0.253 %/°C
Isc coefficient α	+0.04 %/°C	+0.046 %/°C
Vmp coefficient	≈ −0.34 %/°C	—
Operating cell temperature	NMOT 45 ± 2 °C	NOCT 47 °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
380 W	279.4 W	28.15 V × 9.92 A	72.6 W	95%
385 W	283 W	28.34 V × 9.99 A	73.5 W	95%
390 W	286.7 W	28.52 V × 10.05 A	74.4 W	95%
395 W	290.4 W	28.71 V × 10.11 A	75.4 W	95%
400 W	294.1 W	28.89 V × 10.18 A	76.4 W	95%
405 W	297.9 W	29.2 V × 10.2 A	76.4 W	94%
410 W	301.6 W	29.4 V × 10.26 A	77.4 W	94%
415 W	305.2 W	29.6 V × 10.31 A	78.3 W	94%
420 W	308.9 W	29.79 V × 10.37 A	79.3 W	94%
425 W	312.5 W	29.99 V × 10.42 A	80.2 W	94%
430 W	316.3 W	30.18 V × 10.48 A	81.2 W	94%
435 W	319.9 W	30.37 V × 10.53 A	82.1 W	94%
440 W	323.6 W	30.56 V × 10.59 A	83.1 W	94%

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

Electrical & strength ratings

JinkoSolar datasheet

Max system voltage1,000 V
Max series fuse25 A
Fire rating (UL 61730)Type 1
Module temperature−40 °F to +185 °F−40 °C to +85 °C
Hail50 mm (1.97 in) at 32 km/h
Power tolerance+3 / −0 %

Packaging: 31 per pallet · 806 per container

Certifications

CEC PV Module List (Oct 7, 2026) · JinkoSolar datasheet

UL 61730IEC 61215IEC 61730Fire rating Type 1 (UL 61730)ISO 14001ISO 45001ISO 9001

UL 61730CEC listing
IEC 61215datasheet
IEC 61730datasheet
Fire rating Type 1 (UL 61730)datasheet
ISO 14001factory, datasheet
ISO 45001factory, datasheet
ISO 9001factory, datasheet

Warranty & degradation

JinkoSolar datasheet

Straight line from 100% to the end-of-warranty value — linear, per datasheet.

Product warranty25 years
Performance warranty30 years, linear
Year 30≥ 87.4%

Independent reliability testing

Kiwa PVEL Scorecard · RETC PV Module Index

2023, 2024, 2025, 2026

PVEL Top Performer

this series

Tests passed as Top Performer

DH, HSS, LID+LETID, MSS, PID, TC

PVEL Scorecards

JinkoSolar named Top Performer, 2014–2026

2023, 2025, 2026

RETC Overall Highest Achiever

JinkoSolar, manufacturer level

PVEL Top Performer tests

Year	Product	Tests
2023	JKMxxxN-54HL4-B	DHLID+LETIDMSSPIDTC
2024	JKMxxxN-54HL4-B	MSSPID
2025	JKMxxxN-54HL4-B	HSSLID+LETIDMSS
2026	JKMxxxN-54HL4-B	LID+LETID

Tested bill of materials

PVEL-tested factoryChina,Malaysia
Cell technology (tested BOM)n-type TOPCon
Module design (tested BOM)monofacial - glass//backsheet
Power class range tested380-425W
Hail test ice ball50 mm

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

RETC PV Module Index — JinkoSolar

Year	Recognition
2023	Overall Highest Achiever; High Achievement in Performance (LeTID RESISTANCE); High Achievement in Quality (Hail durability test); High Achievement in Reliability (Pid resistance, SDML, Thermal cycle test)
2024	High Achievement in Performance
2025	Overall Highest Achiever
2026	Overall Highest Achiever; High achievement in performance; High achievement in reliability; Performance discipline high achiever (Temperature coefficient, PAN file, Iam); Quality discipline high achiever (BOM verification); Reliability discipline high achiever (Damp heat, Tc, Sdml, Pid)

Inverter compatibility & string sizing

JinkoSolar 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

41.2 V

Voc when cold

per panel

27.1 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	3–14
Solis (Ginlong) S6-EH1P10K-H-US	600 V	80–520 V	datasheet	3–14
Solis (Ginlong) Solis-1P7.6K-4G-US	600 V	100–500 V	datasheet	4–14
Qcells Q.VOLT H7.6SX	498 V	234–498 V	CEC test window	9–12

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	41.2 / 27.1 V	⚠ Works; below MPPT at peak heat	1.47
Enphase IQ8X-80-M-US	320–540 W	79.5 V	43–60 V	41.2 / 27.1 V	✗ Not a match: module voltage below MPPT range	1.12
APsystems (Alt Power System) DS3-L	265–570 W	60 V	28–45 V	41.2 / 27.1 V	⚠ Works; below MPPT at peak heat	0.54
Enphase IQ8M-72-2-US	260–460 W	60 V	30–45 V	41.2 / 27.1 V	⚠ Works; below MPPT at peak heat	1.31
Enphase IQ8A-72-2-US	295–500 W	60 V	32–45 V	41.2 / 27.1 V	⚠ Works; below MPPT at peak heat	1.22

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	712	11,397	6.08
Palmdale	1,835	780	12,478	6.69
Chula Vista	1,696	721	11,533	6.11
Huntington Beach	1,643	698	11,172	5.89
Riverside	1,696	721	11,533	6.21
Santa Clarita	1,724	733	11,723	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.

Who installs JKMxxxN-54HL4-B panels in SoCal

building permits · CSLB License Master

Permits naming this series

Oct 2024 – Nov 2025

Licensed installers

CSLB license on the permit

Jurisdictions so far

LA County (unincorp.) (8), Palmdale (2)

Lumenexx

Walnut · CSLB #1114147

2 installsJul 2025 – Oct 2025Palmdale

Permits over time

Power class named in permit

425 W

440 W

430 W

Typical system

median 11.5 kW, 19 panels (n = 6)

Only installer and ZIP level is shown — no homeowner names, street addresses or permit numbers. Permits from LA County (unincorp.) come without a contractor license, so they count toward totals but not toward installers. Counts grow as more permit portals are loaded.

Installed together with

building permits

Microinverters

Enphase IQ8+

Enphase IQ8D

Batteries

Enphase IQ Battery 5P

Tesla Powerwall 3

Number of permits naming both this panel series and the product; 10 of 10 permits list other equipment.

Compare with similar 425 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	Size	Warranty	PVEL (product / brand)	SoCal permits (series)
JinkoSolar JKM425N-54HL4-B	425 W	≈21.8%	−0.308	38.95	13.58	67.8 × 44.6 in	25 / 30 yr	product 2023, 2024, 2025, 2026	10
Canadian Solar CS3N-425MS	425 W	≥20.9%	−0.332	45.5	11.8	—	25 yr	product 2023	46
Qcells Q.TRON BLK M-G2+ 425	425 W	≥21.8%	−0.276	39.03	13.66	67.8 × 44.6 in	25 / 25 yr	brand 11× (2016–2026)	40
Silfab Solar SIL-425QD	425 W	≈21.8%	−0.294	38.88	13.68	67.8 × 44.6 in	25 / 30 yr	brand 7× (2017–2025)	39

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
THE MOST DEPENDABLE SOLAR PRODUCT
Datasheet · Jinko Solar · Nov 2025
PDF
Module Warranty | Effective 2/2020
Warranty · Jinko Solar · Nov 2025

About JinkoSolar

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

ManufacturerJinkoSolar
Listed in CEC asJinko Solar Co., Ltd, Jinko Solar Co., Ltd.
Websitejinkosolar.us
PVEL Top Performer (manufacturer)12 Scorecards (2014–2026)
RETC PV Module Index2023, 2024, 2025, 2026
Current panel series in CEC list68

Other series by SoCal permits

JKMxxxM-60HBL · 45JKMxxxM-72HL-V · 6JKMxxxM-6RL3-B · 3JKMxxxM-72HL-TV · 3JKMxxxN-54HL4R-B · 1JKMxxxM-72HBL-V · 1

Questions & answers

How efficient is the JinkoSolar JKM425N-54HL4-B?

Calculated from the panel area (1.95 m²): about 21.8% for the 425 W class. 425 W over 1.95 m² equals about 218 W per square meter.

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

PVWatts v8 with typical-year weather gives about 712 kWh per year per 425 W panel in Los Angeles and about 780 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 3–14 panels per string (Voc at 2 °C = 41.2 V, Vmp at 74 °C cell = 27.1 V). Final design must follow the inverter manual and NEC 690.7.

What does the warranty cover?

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

How big and heavy is it?

67.8 × 44.6 × 1.38 in (1,722 × 1,134 × 35 mm), 46.3 lb (21 kg).

Has this panel been reliability-tested?

JKMxxxN-54HL4-B was a PVEL Top Performer in 2023, 2024, 2025, 2026 (DH, HSS, LID+LETID, MSS, PID, TC).

What fire rating does it have?

UL 61730 fire rating Type 1 per datasheet.

Sources

California Energy Commission — Solar Equipment Lists, PV Module List, Inverter List (snapshot Oct 7, 2026).
JinkoSolar — datasheet THE MOST DEPENDABLE SOLAR PRODUCT.
JinkoSolar — manufacturer datasheet “THE MOST DEPENDABLE SOLAR PRODUCT”.
Canadian Solar — manufacturer datasheet “HiKu Mono PERC CS3N-400|405|410|415|420|425MS MORE POWER”.
Qcells — manufacturer datasheet “Q.TRON BLK M-G2+ SERIES 415–440 Wp”.
Silfab Solar — datasheet NTC SIL-420 QD CELL TECHNOLOGY.
JinkoSolar — document library on the manufacturer’s website (links above).
Kiwa PVEL — PV Module Reliability Scorecard, Top Performer lists 2014–2026.
RETC — PV Module Index reports 2023–2026.
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 — Los Angeles County Public Works (EPIC-LA, unincorporated areas) (Oct 2024 – Nov 2025); City of Palmdale (Jul 2025 – Oct 2025). Equipment matched from permit descriptions by model number.
Contractors State License Board — License Master (contractor names and license status), as of Oct 5, 2026.
Cali-Graf calculations — formulas and inputs are shown next to each calculated value (efficiency from area, temperature-corrected voltages, string sizing, energy estimates).