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75.7″ · 1,924 mm
40.9″ · 1,038 mm wide · 1.38″ (35 mm) frame · 48.5 lb (22 kg)
Solar panelWaaree

Waaree WSMDi 400

132 half-cut cells, PERC. Power classes 395–415 W in the CEC list.

CEC listed · Dec 12, 2022UL 6173012-yr product + 27-yr performance warrantyPERCInstalled in 3 SoCal permits
Power class
  • Power (STC)400 WCEC nameplate
  • Efficiency≥20.0%datasheet minimum
  • %/°C Pmax−0.36CEC test: −0.348
  • Performance warranty27 yrdatasheet

Power classes

CEC PV Module List (Oct 7, 2026) · Waaree datasheet · 5 models
ModelPmaxVoc, VIsc, AVmp, VImp, AEfficiencyPTCCEC listed
WSMDi-395395 W45.0011.2437.7710.47≥19.8%368 WDec 12, 2022
WSMDi-400400 W45.2211.3238.0010.54≥20.0%373 WDec 12, 2022
WSMDi-405405 W45.4411.4038.2210.61≥20.3%378 WDec 12, 2022
WSMDi-410410 W45.6611.4838.4410.68≥20.5%383 WDec 12, 2022
WSMDi-415415 W45.8811.5738.6610.75≥20.8%388 WDec 12, 2022

Build & dimensions

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

Heat & cold behaviour

Waaree datasheet · CEC PV Module List (Oct 7, 2026) · Cali-Graf calculation
DatasheetCEC listing test
Pmax coefficient γ−0.36 %/°C−0.348 %/°C
Voc coefficient β−0.28 %/°C−0.257 %/°C
Isc coefficient α+0.06 %/°C+0.031 %/°C
Vmp coefficient≈ −0.42 %/°C—
Operating cell temperatureNMOT 43 ± 2 °CNOCT 45.1 °C
Vmp coefficient ≈ γ − α (datasheet); used only for the hot-roof voltage estimate.

At normal operating conditions (NOCT, 800 W/m²) — datasheet

ClassPmax, WVoc, VIsc, AVmp, VImp, A
395 W296.842.109.0834.708.55
400 W300.642.309.1434.908.62
405 W304.442.509.2135.108.68
410 W308.242.709.2735.308.74
415 W312.142.909.3435.408.81

Away from lab conditions — CEC listing test points

ClassPmax at NOCTVmp × Imp at NOCTPmax at 200 W/m²Low-light efficiency vs STC
395 W294.2 W34.76 V × 8.46 A77.6 W98%
400 W297.9 W34.97 V × 8.52 A78.6 W98%
405 W301.7 W35.17 V × 8.58 A79.6 W98%
410 W305.4 W35.37 V × 8.63 A80.6 W98%
415 W309.2 W35.58 V × 8.69 A81.5 W98%
Pmax = Vmp × Imp from the CEC listing; low-light efficiency = Pmax at 200 W/m² ÷ (20% of STC Pmax).

Electrical & strength ratings

Certifications

CEC PV Module List (Oct 7, 2026) · Waaree datasheets
UL 61730IEC 61215IEC 61730IEC 62804Fire rating Type 2 (UL 61730)ISO 14001ISO 45001ISO 9001

Warranty & degradation

Waaree datasheet

Independent reliability testing

Kiwa PVEL Scorecard · RETC PV Module Index
5
PVEL Scorecards
Waaree named Top Performer, 2022–2026
2025, 2026
RETC Overall Highest Achiever
Waaree, manufacturer level
This exact series is not listed in published PVEL Top Performer tables. Results below are for the manufacturer.

RETC PV Module Index — Waaree

YearRecognition
2024Test Category High Achiever
2025Overall Highest Achiever
2026Overall 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

Waaree 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)
48.2 V
Voc when cold
per panel
30.2 V
Vmp when hot
per panel
12
Max panels / string
max DC 600 V
2
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

InverterMax DC inputMPPTWindow sourcePanels per string
Tesla 1538000-xx-y600 V60–480 Vdatasheet2–12
Solis (Ginlong) S6-EH1P10K-H-US600 V80–520 Vdatasheet3–12
Solis (Ginlong) Solis-1P7.6K-4G-US600 V100–500 Vdatasheet4–12
Qcells Q.VOLT H7.6SX498 V234–498 VCEC test window8–10

Microinverters (one per panel)

MicroinverterRecommended module powerMax DC inputMPPTVoc cold / Vmp hotCheckDC/AC
Enphase IQ8PLUS-72-2-US235–440 W60 V29–45 V48.2 / 30.2 V✓ Within range1.38
Enphase IQ8X-80-M-US320–540 W79.5 V43–60 V48.2 / 30.2 V✗ Not a match: module voltage below MPPT range1.05
APsystems (Alt Power System) DS3-L265–570 W60 V28–45 V48.2 / 30.2 V✓ Within range0.51
Enphase IQ8M-72-2-US260–460 W60 V30–45 V48.2 / 30.2 V✓ Within range1.23
Enphase IQ8A-72-2-US295–500 W60 V32–45 V48.2 / 30.2 V⚠ Works; below MPPT at peak heat1.15
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
CitykWh / kW / yrkWh / panel / yrkWh / system / yrSun, kWh/m²/day
Los Angeles1,67667012,0676.08
Palmdale1,83573413,2126.69
Chula Vista1,69667812,2116.11
Huntington Beach1,64365711,8305.89
Riverside1,69667812,2116.21
Santa Clarita1,72469012,4136.28
788Jan788Feb1,012Mar1,117Apr1,104May1,173Jun1,236Jul1,250Aug1,093Sep964Oct829Nov717DeckWh per month · Los Angeles
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 WSMDi panels in SoCal

building permits
3
Permits naming this series
Jun 2023 – Oct 2023
1
Jurisdictions so far
LA County (unincorp.) (3)
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 IQ7HS
3
Number of permits naming both this panel series and the product; 3 of 3 permits list other equipment.

Compare with similar 400 W panels

CEC PV Module List (Oct 7, 2026) · Qcells datasheet · Kiwa PVEL Scorecard · building permits
PanelPmaxEfficiencyγ Pmax (CEC)Voc, VIsc, APVEL (product / brand)SoCal permits (series)
Waaree WSMDi 400400 W≥20%−0.34845.2211.32brand 5×3
Qcells Q.PEAK DUO BLK ML-G10+ 400400 W≥20.4%−0.36245.311.14product 2022, 2023221
JA Solar JAM54S31-400/MR400 W≈21.1%−0.32937.0713.79product 2023, 2024152
REC Group REC400AA Pure400 W≈22.3%−0.25648.810.25brand 9× (2016–2025)66
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

About Waaree

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

Other series by SoCal permits

BiN-21BiN-01BiN-02BiN-03BiN-05BiN-06

Questions & answers

How efficient is the Waaree WSMDi 400?

The Waaree datasheet guarantees at least 20% module efficiency for the 400 W class (up to 20.8% for 415 W). 400 W over 2 m² equals about 200 W per square meter.

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

PVWatts v8 with typical-year weather gives about 670 kWh per year per 400 W panel in Los Angeles and about 734 kWh in Palmdale (20° roof, facing south, 14% system losses).

How much power does it lose on a hot roof?

With γ = −0.36 %/°C, at a 77 °C cell temperature (hottest modeled hour in Palmdale) output is about 18.9% 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 2–12 panels per string (Voc at 2 °C = 48.2 V, Vmp at 74 °C cell = 30.2 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 48.2 V vs max input 60 V; Vmp when hot 30.2 V vs MPPT low 29 V; recommended module power 235–440 W. Confirm on the microinverter maker’s compatibility list.

What does the warranty cover?

12 years on the product and 27 years on performance (manufacturer datasheet).

How big and heavy is it?

75.7 × 40.9 × 1.38 in (1,924 × 1,038 × 35 mm), 48.5 lb (22 kg).

Has this panel been reliability-tested?

This exact series is not in published PVEL Top Performer tables; Waaree was named a Top Performer in 5 Scorecards (2022–2026). RETC named Waaree Overall Highest Achiever in 2025, 2026.

Sources

  1. California Energy Commission — Solar Equipment Lists, PV Module List, Inverter List (snapshot Oct 7, 2026).
  2. Waaree — datasheet ARKA-SERIES-WSMDi-395-415-WEL-EPD-395-415-132-MP-HC-01.
  3. Waaree — manufacturer datasheet “ARKA SERIES WSMDi-395 to WSMDi-415 166 mm2”.
  4. Qcells — manufacturer datasheet “Q.PEAK DUO BLK ML-G10+ ENDURING HIGH PERFORMANCE”.
  5. Waaree — document library on the manufacturer’s website (links above).
  6. Kiwa PVEL — PV Module Reliability Scorecard, Top Performer lists 2022–2026.
  7. RETC — PV Module Index reports 2024–2026.
  8. NLR (formerly NREL) — System Advisor Model CEC inverter library (version 2026.7.3).
  9. NLR (formerly NREL) — PVWatts v8, NSRDB PSM v3 typical-year weather for Los Angeles, Palmdale, Chula Vista, Huntington Beach, Riverside, Santa Clarita.
  10. Inverter datasheets — APsystems (Alt Power System), Enphase, Solis (Ginlong), Tesla (manufacturer documents).
  11. Building permits — Los Angeles County Public Works (EPIC-LA, unincorporated areas) (Jun 2023 – Oct 2023). Equipment matched from permit descriptions by model number.
  12. Cali-Graf calculations — formulas and inputs are shown next to each calculated value (efficiency from area, temperature-corrected voltages, string sizing, energy estimates).