Illustration · 132 half-cut cells

Solar panelWaaree

Waaree WSMDIB 425

Name: Waaree WSMDIB 425
Brand: Waaree

132 half-cut cells, bifacial, black backsheet. Power classes 395–455 W in the CEC list.

CEC listed · Mar 1, 2023UL 61730BifacialPVEL Top Performer 2024

Power class

Power (STC)425 WCEC nameplate
Efficiency≈19.8%calculated from area
%/°C Pmax−0.320CEC listing test
PTC / STC93.1%PTC 396 W (CEC)

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
WSMDIB-395	395 W	45.00	11.24	37.77	10.47	≈19.9%	371 W	Apr 3, 2023
WSMDIB-400	400 W	45.22	11.32	38.00	10.54	≈20.2%	376 W	Apr 3, 2023
WSMDIB-405	405 W	45.44	11.40	38.22	10.61	≈20.5%	380 W	Apr 3, 2023
WSMDIB-410	410 W	45.66	11.48	38.44	10.68	≈20.7%	385 W	Apr 3, 2023
WSMDIB-415	415 W	45.88	11.57	38.66	10.75	≈21.0%	390 W	Apr 3, 2023
WSMDIB-420	420 W	49.01	11.04	40.61	10.35	≈19.5%	391 W	Mar 1, 2023
WSMDIB-425	425 W	49.19	11.11	40.81	10.42	≈19.8%	396 W	Mar 1, 2023
WSMDIB-430	430 W	49.39	11.19	41.01	10.49	≈20.0%	400 W	Mar 1, 2023
WSMDIB-435	435 W	49.59	11.25	41.21	10.56	≈20.2%	405 W	Mar 1, 2023
WSMDIB-440	440 W	49.69	11.34	41.41	10.63	≈20.5%	410 W	Mar 1, 2023
WSMDIB-445	445 W	49.89	11.41	41.61	10.70	≈20.7%	415 W	Mar 1, 2023
WSMDIB-450	450 W	50.10	11.46	41.81	10.77	≈20.9%	420 W	Mar 1, 2023
WSMDIB-455	455 W	50.30	11.53	42.02	10.84	≈21.2%	424 W	Mar 1, 2023

≈ efficiency = Pmax ÷ CEC-listed area 1.98 m².

Build & dimensions

CEC PV Module List (Oct 7, 2026)

Module area2.15 m² (23.1 ft²)CEC-listed area
Cells132 half-cut cells
Back coverBlack backsheet

Heat & cold behaviour

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

	CEC listing test
Pmax coefficient γ	−0.320 %/°C
Voc coefficient β	−0.245 %/°C
Isc coefficient α	+0.032 %/°C
Operating cell temperature	NOCT 47.2 °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
395 W	291.1 W	35.5 V × 8.2 A	76.6 W	97%
400 W	294.8 W	35.72 V × 8.25 A	77.6 W	97%
405 W	298.5 W	35.92 V × 8.31 A	78.6 W	97%
410 W	302.2 W	36.13 V × 8.36 A	79.6 W	97%
415 W	305.9 W	36.34 V × 8.42 A	80.5 W	97%
420 W	305.4 W	37.37 V × 8.17 A	82.2 W	98%
425 W	309 W	37.55 V × 8.23 A	83.2 W	98%
430 W	312.6 W	37.74 V × 8.28 A	84.2 W	98%
435 W	316.2 W	37.92 V × 8.34 A	85.2 W	98%
440 W	319.9 W	38.11 V × 8.39 A	86.1 W	98%
445 W	323.6 W	38.29 V × 8.45 A	87.1 W	98%
450 W	327.2 W	38.47 V × 8.51 A	88.1 W	98%
455 W	331 W	38.67 V × 8.56 A	89.1 W	98%

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 · RETC PV Module Index

2024

PVEL Top Performer

this series

Tests passed as Top Performer

LID+LETID

PVEL Scorecards

Waaree named Top Performer, 2022–2026

2025, 2026

RETC Overall Highest Achiever

Waaree, manufacturer level

PVEL Top Performer tests

Year	Product	Tests
2024	WSMDiB-xxx	LID+LETID

Tested bill of materials

PVEL-tested factoryIndia
Cell technology (tested BOM)p-type PERC
Module design (tested BOM)monofacial - glass//backsheet
Power class range tested430-475W

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

RETC PV Module Index — Waaree

Year	Recognition
2024	Test Category High Achiever
2025	Overall Highest Achiever
2026	Overall Highest Achiever; High achievement in performance; High achievement in reliability; Performance discipline high achiever (Temperature coefficient, Iam, Letid); Quality discipline high achiever (BOM verification); Reliability discipline high achiever (Damp heat, Pid, Tc)

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

52 V

Voc when cold

per panel

33.8 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. 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	3–11
Qcells Q.VOLT H7.6SX	498 V	234–498 V	CEC test window	7–9

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	52 / 33.8 V	✓ Within range	1.47
Enphase IQ8X-80-M-US	320–540 W	79.5 V	43–60 V	52 / 33.8 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	52 / 33.8 V	✓ Within range	0.54
Enphase IQ8M-72-2-US	260–460 W	60 V	30–45 V	52 / 33.8 V	✓ Within range	1.31
Enphase IQ8A-72-2-US	295–500 W	60 V	32–45 V	52 / 33.8 V	✓ Within range	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.

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	Warranty	PVEL (product / brand)	SoCal permits (series)
Waaree WSMDIB 425	425 W	≈19.8%	−0.320	49.19	11.11	—	product 2024	—
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	25 / 25 yr	brand 11× (2016–2026)	40
Silfab Solar SIL-425QD	425 W	≈21.8%	−0.294	38.88	13.68	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.

About Waaree

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

ManufacturerWaaree
Listed in CEC asWAAREE ENERGIES LIMITED
Websitewaaree.com
PVEL Top Performer (manufacturer)5 Scorecards (2022–2026)
RETC PV Module Index2024, 2025, 2026
Current panel series in CEC list22

Other series by SoCal permits

WSMDi · 3BiN-21BiN-01BiN-02BiN-03BiN-05

Questions & answers

How efficient is the Waaree WSMDIB 425?

Calculated from the panel area (2.15 m²): about 19.8% for the 425 W class. 425 W over 2.15 m² equals about 198 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 = −0.320 %/°C, at a 77 °C cell temperature (hottest modeled hour in Palmdale) output is about 16.6% 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 = 52 V, Vmp at 74 °C cell = 33.8 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 52 V vs max input 60 V; Vmp when hot 33.8 V vs MPPT low 29 V; recommended module power 235–440 W. Confirm on the microinverter maker’s compatibility list.

Is it bifacial?

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

Has this panel been reliability-tested?

WSMDiB-xxx was a PVEL Top Performer in 2024 (LID+LETID).

Sources

California Energy Commission — Solar Equipment Lists, PV Module List, Inverter List (snapshot Oct 7, 2026).
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.
Kiwa PVEL — PV Module Reliability Scorecard, Top Performer lists 2022–2026.
RETC — PV Module Index reports 2024–2026.
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 — 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).