Illustration · 120 half-cut cells

Solar panelZhejiang Sunpro Power Technology

Zhejiang Sunpro Power Technology SPDG450-120M10

Name: Zhejiang Sunpro Power Technology SPDG450-120M10
Brand: Zhejiang Sunpro Power Technology

120 half-cut cells. Power classes 435–470 W in the CEC list.

CEC listed · Sep 11, 2024UL 61730

Power class

Power (STC)450 WCEC nameplate
Efficiency≈21.3%calculated from area
%/°C Pmax−0.346CEC listing test
PTC / STC94.1%PTC 423 W (CEC)

Power classes

CEC PV Module List (Oct 7, 2026) · Cali-Graf calculation · 8 models

Model	Pmax	Voc, V	Isc, A	Vmp, V	Imp, A	Efficiency	PTC	CEC listed
SPDG435-120M10	435 W	40.80	13.55	34.07	12.77	≈20.6%	409 W	Sep 11, 2024
SPDG440-120M10	440 W	41.10	13.60	34.32	12.83	≈20.9%	414 W	Sep 11, 2024
SPDG445-120M10	445 W	41.30	13.65	34.56	12.88	≈21.1%	418 W	Sep 11, 2024
SPDG450-120M10	450 W	41.50	13.70	34.81	12.93	≈21.3%	423 W	Sep 11, 2024
SPDG455-120M10	455 W	41.70	13.75	35.06	12.98	≈21.6%	428 W	Sep 11, 2024
SPDG460-120M10	460 W	41.90	13.80	35.31	13.03	≈21.8%	433 W	Sep 11, 2024
SPDG465-120M10	465 W	42.10	13.85	35.56	13.08	≈22.0%	438 W	Sep 11, 2024
SPDG470-120M10	470 W	42.30	13.90	35.81	13.13	≈22.3%	443 W	Sep 11, 2024

≈ efficiency = Pmax ÷ CEC-listed area 2.11 m².

Build & dimensions

CEC PV Module List (Oct 7, 2026)

Module area2.11 m² (22.7 ft²)CEC-listed area
Cells120 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	−0.346 %/°C
Voc coefficient β	−0.274 %/°C
Isc coefficient α	+0.050 %/°C
Operating cell temperature	NOCT 43.2 °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
435 W	322.3 W	31.4 V × 10.26 A	87 W	100%
440 W	326.2 W	31.63 V × 10.31 A	88 W	100%
445 W	329.7 W	31.85 V × 10.35 A	89 W	100%
450 W	333.4 W	32.09 V × 10.39 A	90 W	100%
455 W	337.1 W	32.32 V × 10.43 A	91 W	100%
460 W	340.8 W	32.55 V × 10.47 A	92 W	100%
465 W	344.5 W	32.78 V × 10.51 A	93 W	100%
470 W	348.3 W	33.01 V × 10.55 A	94 W	100%

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

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

44.1 V

Voc when cold

per panel

28.1 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. 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	3–13
Solis (Ginlong) S6-EH1P10K-H-US	600 V	80–520 V	datasheet	3–13
Solis (Ginlong) Solis-1P7.6K-4G-US	600 V	100–500 V	datasheet	4–13
Qcells Q.VOLT H7.6SX	498 V	234–498 V	CEC test window	9–11

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	44.1 / 28.1 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	44.1 / 28.1 V	✓ Within range	0.58
Enphase IQ8M-72-2-US	260–460 W	60 V	30–45 V	44.1 / 28.1 V	⚠ Works; below MPPT at peak heat	1.38
Enphase IQ8A-72-2-US	295–500 W	60 V	32–45 V	44.1 / 28.1 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 SPDG450-120M10	450 W	≈21.3%	−0.346	41.5	13.7	—	—
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 SPDG450-120M10?

Calculated from the panel area (2.11 m²): about 21.3% for the 450 W class. 450 W over 2.11 m² equals about 213 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 = −0.346 %/°C, at a 77 °C cell temperature (hottest modeled hour in Palmdale) output is about 17.9% 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 3–13 panels per string (Voc at 2 °C = 44.1 V, Vmp at 74 °C cell = 28.1 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 44.1 V vs max input 60 V; Vmp when hot 28.1 V vs MPPT low 28 V; recommended module power 265–570 W. Confirm on the microinverter maker’s compatibility list.

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).
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).