Illustration · 108 cells

Solar panelSun Gold Power

Sun Gold Power SG455WM

Name: Sun Gold Power SG455WM
Brand: Sun Gold Power

108 cells. Power classes 380–550 W in the CEC list.

CEC listed · Aug 1, 2025UL 61730

Power class

Power (STC)455 WCEC nameplate
Efficiency≈23.9%calculated from area
%/°C Pmax−0.339CEC listing test
PTC / STC94.8%PTC 431 W (CEC)

Power classes

CEC PV Module List (Oct 7, 2026) · Cali-Graf calculation · 30 models

Model	Pmax	Voc, V	Isc, A	Vmp, V	Imp, A	Efficiency	PTC	CEC listed
SG380WM	380 W	36.30	13.20	30.50	12.45	≈20.0%	358 W	Aug 1, 2025
SG385WM	385 W	36.40	13.35	30.60	12.60	≈20.3%	363 W	Aug 1, 2025
SG390WM	390 W	36.50	13.50	30.60	12.73	≈20.5%	368 W	Aug 1, 2025
SG395WM	395 W	36.60	13.52	31.00	12.75	≈20.8%	373 W	Aug 1, 2025
SG400WM	400 W	37.30	13.53	31.40	12.76	≈21.1%	378 W	Aug 1, 2025
SG405WM	405 W	37.30	13.68	31.40	12.91	≈21.3%	383 W	Aug 1, 2025
SG410WM	410 W	37.50	13.79	31.50	13.01	≈21.6%	388 W	Aug 1, 2025
SG415WM	415 W	37.60	13.92	31.60	13.13	≈21.8%	392 W	Aug 1, 2025
SG420WM	420 W	37.70	14.07	31.70	13.27	≈22.1%	397 W	Aug 1, 2025
SG430WM	430 W	39.70	13.56	33.60	12.79	≈22.6%	407 W	Aug 1, 2025
SG435WM	435 W	39.70	13.70	33.70	12.93	≈22.9%	412 W	Aug 1, 2025
SG440WM	440 W	39.80	13.73	33.70	13.05	≈23.2%	417 W	Aug 1, 2025
SG445WM	445 W	40.30	13.81	33.80	13.15	≈23.4%	421 W	Aug 1, 2025
SG450WM	450 W	41.70	13.82	34.20	13.16	≈23.7%	426 W	Aug 1, 2025
SG455WM	455 W	41.70	14.06	34.30	13.26	≈23.9%	431 W	Aug 1, 2025
SG460WM	460 W	41.80	14.13	34.50	13.33	≈24.2%	436 W	Aug 1, 2025
SG480WM	480 W	44.10	13.72	37.10	12.94	≈25.3%	456 W	Aug 1, 2025
SG485WM	485 W	44.20	13.85	37.10	13.07	≈25.5%	460 W	Aug 1, 2025
SG490WM	490 W	44.20	13.98	37.20	13.19	≈25.8%	465 W	Aug 1, 2025
SG495WM	495 W	44.40	14.08	37.30	13.28	≈26.1%	470 W	Aug 1, 2025
SG500WM	500 W	44.40	14.09	37.60	13.30	≈26.3%	475 W	Aug 1, 2025
SG505WM	505 W	45.20	14.11	38.00	13.31	≈26.6%	480 W	Aug 1, 2025
SG510WM	510 W	45.40	14.18	38.10	13.38	≈26.8%	485 W	Aug 1, 2025
SG520WM	520 W	48.30	13.57	40.60	12.80	≈27.4%	495 W	Aug 1, 2025
SG525WM	525 W	48.40	13.68	40.70	12.91	≈27.6%	500 W	Aug 1, 2025
SG530WM	530 W	48.60	13.75	40.90	12.97	≈27.9%	504 W	Aug 1, 2025
SG535WM	535 W	48.80	13.84	41.00	13.06	≈28.2%	509 W	Aug 1, 2025
SG540WM	540 W	48.90	13.92	41.10	13.09	≈28.4%	514 W	Aug 1, 2025
SG545WM	545 W	49.50	14.00	41.60	13.10	≈28.7%	519 W	Aug 1, 2025
SG550WM	550 W	49.90	14.01	42.00	13.11	≈28.9%	524 W	Aug 1, 2025

≈ 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 cells
Back coverWhite backsheet

Heat & cold behaviour

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

	CEC listing test
Pmax coefficient γ	−0.339 %/°C
Voc coefficient β	−0.259 %/°C
Isc coefficient α	+0.050 %/°C
Operating cell temperature	NOCT 42.3 °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
380 W	273.8 W	28.4 V × 9.64 A	—	—
385 W	278.2 W	28.5 V × 9.76 A	—	—
390 W	281 W	28.5 V × 9.86 A	—	—
395 W	285.5 W	28.9 V × 9.88 A	—	—
400 W	288.5 W	29.2 V × 9.88 A	—	—
405 W	292 W	29.2 V × 10 A	—	—
410 W	296.4 W	29.4 V × 10.08 A	—	—
415 W	299 W	29.4 V × 10.17 A	—	—
420 W	303.3 W	29.5 V × 10.28 A	—	—
430 W	302.4 W	31.4 V × 9.63 A	—	—
435 W	305.8 W	31.4 V × 9.74 A	—	—
440 W	309.6 W	31.5 V × 9.83 A	—	—
445 W	312.8 W	31.6 V × 9.9 A	—	—
450 W	316.1 W	31.9 V × 9.91 A	—	—
455 W	319.7 W	32 V × 9.99 A	—	—
460 W	323.3 W	32.2 V × 10.04 A	—	—
480 W	352.5 W	35.5 V × 9.93 A	—	—
485 W	357.1 W	35.6 V × 10.03 A	—	—
490 W	360.3 W	35.6 V × 10.12 A	—	—
495 W	363.8 W	35.7 V × 10.19 A	—	—
500 W	367.6 W	36 V × 10.21 A	—	—
505 W	371.6 W	36.4 V × 10.21 A	—	—
510 W	374.9 W	36.5 V × 10.27 A	—	—
520 W	375.6 W	37.9 V × 9.91 A	—	—
525 W	379.6 W	38 V × 9.99 A	—	—
530 W	382.5 W	38.1 V × 10.04 A	—	—
535 W	386.2 W	38.2 V × 10.11 A	—	—
540 W	389 W	38.4 V × 10.13 A	—	—
545 W	393.4 W	38.8 V × 10.14 A	—	—
550 W	397.9 W	39.2 V × 10.15 A	—	—

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

44.2 V

Voc when cold

per panel

27.8 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	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	44.2 / 27.8 V	✗ Not a match: module voltage below MPPT range	1.2
APsystems (Alt Power System) DS3-L	265–570 W	60 V	28–45 V	44.2 / 27.8 V	⚠ Works; below MPPT at peak heat	0.58
Enphase IQ8M-72-2-US	260–460 W	60 V	30–45 V	44.2 / 27.8 V	⚠ Works; below MPPT at peak heat	1.4
Enphase IQ8A-72-2-US	295–500 W	60 V	32–45 V	44.2 / 27.8 V	⚠ Works; below MPPT at peak heat	1.3

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	763	11,439	6.08
Palmdale	1,835	835	12,524	6.69
Chula Vista	1,696	772	11,575	6.11
Huntington Beach	1,643	748	11,213	5.89
Riverside	1,696	772	11,575	6.21
Santa Clarita	1,724	784	11,766	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 455 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	SoCal permits (series)
Sun Gold Power SG455WM	455 W	≈23.9%	−0.339	41.7	14.06	—
Hyundai Energy Solutions HiN-T450NF(BK)	450 W	≈23.2%	−0.298	39.2	14.53	37
REC Group REC455AA Pure-RX	455 W	≈22.5%	−0.248	65.6	8.84	33
Aptos Solar DNA-120-MF10-455W	455 W	≈21%	−0.363	41.5	13.93	22

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 Sun Gold Power SG455WM?

Calculated from the panel area (1.9 m²): about 23.9% for the 455 W class. 455 W over 1.9 m² equals about 239 W per square meter.

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

PVWatts v8 with typical-year weather gives about 763 kWh per year per 455 W panel in Los Angeles and about 835 kWh in Palmdale (20° roof, facing south, 14% system losses).

How much power does it lose on a hot roof?

With γ = −0.339 %/°C, at a 77 °C cell temperature (hottest modeled hour in Palmdale) output is about 17.6% 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 3–13 panels per string (Voc at 2 °C = 44.2 V, Vmp at 74 °C cell = 27.8 V). Final design must follow the inverter manual and NEC 690.7.

Sources

California Energy Commission — Solar Equipment Lists, PV Module List, Inverter List (snapshot Oct 7, 2026).
Hyundai Energy Solutions — datasheet [US] NF(BK)(HiN) Series (N TOPCon Bifacial) 435~445W.
Aptos Solar — datasheet Legacy Products.
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).