Illustration · 108 half-cut cells

Solar panelZhejiang Sunpro Power Technology

Zhejiang Sunpro Power Technology SPDG450-N108M10

Name: Zhejiang Sunpro Power Technology SPDG450-N108M10
Brand: Zhejiang Sunpro Power Technology

108 half-cut cells, bifacial, glass (dual-glass module). Power classes 410–450 W in the CEC list.

CEC listed · Sep 11, 2024UL 61730Bifacial

Power class

Power (STC)450 WCEC nameplate
Efficiency≈23.7%calculated from area
%/°C Pmax−0.295CEC listing test
PTC / STC95.1%PTC 428 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
SPDG410-N108M10	410 W	37.94	13.85	31.25	13.12	≈21.6%	389 W	Sep 11, 2024
SPDG415-N108M10	415 W	38.04	13.96	31.37	13.23	≈21.8%	394 W	Sep 11, 2024
SPDG420-N108M10	420 W	38.13	14.07	31.49	13.34	≈22.1%	399 W	Sep 11, 2024
SPDG425-N108M10	425 W	38.24	14.16	31.64	13.44	≈22.4%	404 W	Sep 11, 2024
SPDG430-N108M10	430 W	38.34	14.25	31.79	13.53	≈22.6%	409 W	Sep 11, 2024
SPDG435-N108M10	435 W	38.43	14.34	31.94	13.62	≈22.9%	413 W	Sep 11, 2024
SPDG440-N108M10	440 W	38.53	14.43	32.09	13.72	≈23.2%	418 W	Sep 11, 2024
SPDG445-N108M10	445 W	38.64	14.53	32.25	13.80	≈23.4%	423 W	May 1, 2026
SPDG450-N108M10	450 W	38.75	14.63	32.41	13.89	≈23.7%	428 W	May 1, 2026

≈ efficiency = Pmax ÷ CEC-listed area 1.9 m².

Build & dimensions

CEC PV Module List (Oct 7, 2026)

Module area1.9 m² (20.5 ft²)CEC-listed area
Cells108 half-cut cells
Back coverGlass (dual-glass module)

Heat & cold behaviour

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

	CEC listing test
Pmax coefficient γ	−0.295 %/°C
Voc coefficient β	−0.251 %/°C
Isc coefficient α	+0.043 %/°C
Operating cell temperature	NOCT 43.4 °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
410 W	298.7 W	29.12 V × 10.26 A	78.8 W	96%
415 W	302.4 W	29.24 V × 10.34 A	79.7 W	96%
420 W	306 W	29.35 V × 10.43 A	80.7 W	96%
425 W	309.8 W	29.49 V × 10.51 A	81.7 W	96%
430 W	313.4 W	29.63 V × 10.58 A	82.6 W	96%
435 W	316.9 W	29.77 V × 10.65 A	83.6 W	96%
440 W	320.8 W	29.91 V × 10.72 A	84.6 W	96%
445 W	324.2 W	30.06 V × 10.79 A	85.5 W	96%
450 W	328 W	30.21 V × 10.86 A	86.5 W	96%

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

Certifications

CEC PV Module List (Oct 7, 2026) · Clean Energy Council (Australia)

UL 61730IEC 61215:2021 / IEC 61730:2023

UL 61730CEC listing
IEC 61215:2021 / IEC 61730:2023TÜV SÜD Product Service GmbH, valid to Oct 2027

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

41 V

Voc when cold

per panel

27 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	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 IQ8X-80-M-US	320–540 W	79.5 V	43–60 V	41 / 27 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	41 / 27 V	⚠ Works; below MPPT at peak heat	0.58
Enphase IQ8M-72-2-US	260–460 W	60 V	30–45 V	41 / 27 V	⚠ Works; below MPPT at peak heat	1.38
Enphase IQ8A-72-2-US	295–500 W	60 V	32–45 V	41 / 27 V	⚠ Works; below MPPT at peak heat	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)
Zhejiang Sunpro Power Technology SPDG450-N108M10	450 W	≈23.7%	−0.295	38.75	14.63	—	—
Qcells Q.TRON BLK M-G2+ 445	445 W	≈22.8%	−0.276	40.16	13.98	brand 11× (2016–2026)	40
Hyundai Energy Solutions HiN-T450NF(BK)	450 W	≈23.2%	−0.298	39.2	14.53	brand 5× (2017–2025)	37
REC Group REC450AA Pure-RX	450 W	≈22.3%	−0.248	65.1	8.81	brand 9× (2016–2025)	33

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.

Questions & answers

How efficient is the Zhejiang Sunpro Power Technology SPDG450-N108M10?

Calculated from the panel area (1.9 m²): about 23.7% for the 450 W class. 450 W over 1.9 m² equals about 237 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 = −0.295 %/°C, at a 77 °C cell temperature (hottest modeled hour in Palmdale) output is about 15.3% 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 3–14 panels per string (Voc at 2 °C = 41 V, Vmp at 74 °C cell = 27 V). Final design must follow the inverter manual and NEC 690.7.

Is it bifacial?

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

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”.
Hyundai Energy Solutions — datasheet [US] NF(BK)(HiN) Series (N TOPCon Bifacial) 435~445W.
Kiwa PVEL — PV Module Reliability Scorecard, Top Performer lists.
NLR (formerly NREL) — System Advisor Model CEC inverter library (version 2026.7.3).
Clean Energy Council (Australia) — Approved PV modules list (as of Oct 8, 2026).
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).