Illustration · 144 half-cut cells

Solar panelSunpal Power

Sunpal Power SP525M-72HB

Name: Sunpal Power SP525M-72HB
Brand: Sunpal Power

144 half-cut cells. Power classes 435–570 W in the CEC list.

CEC listed · Apr 3, 2023UL 61730

Power class

Power (STC)525 WCEC nameplate
Efficiency≈20.3%calculated from area
%/°C Pmax−0.304CEC listing test
PTC / STC93.9%PTC 493 W (CEC)

Power classes

CEC PV Module List (Oct 7, 2026) · Cali-Graf calculation · 19 models

Model	Pmax	Voc, V	Isc, A	Vmp, V	Imp, A	Efficiency	PTC	CEC listed
SP435M-72HB	435 W	49.36	11.23	40.72	10.69	≈20.0%	404 W	Apr 3, 2023
SP440M-72HB	440 W	49.56	11.30	40.92	10.76	≈20.3%	409 W	Apr 3, 2023
SP445M-72HB	445 W	49.76	11.37	41.10	10.83	≈20.5%	414 W	Apr 3, 2023
SP450M-72HB	450 W	50.00	11.44	41.32	10.90	≈20.7%	419 W	Apr 3, 2023
SP455M-72HB	455 W	50.16	11.51	41.52	10.96	≈21.0%	424 W	Apr 3, 2023
SP460M-72HB	460 W	50.36	11.58	41.72	11.03	≈21.2%	428 W	Apr 3, 2023
SP465M-72HB	465 W	50.56	11.65	41.92	11.10	≈21.4%	433 W	Apr 3, 2023
SP470M-72HB	470 W	50.76	11.72	42.12	11.17	≈21.7%	438 W	Apr 3, 2023
SP520M-72HB	520 W	49.18	13.54	40.50	12.84	≈20.2%	488 W	Apr 3, 2023
SP525M-72HB	525 W	49.28	13.61	40.59	12.94	≈20.3%	493 W	Apr 3, 2023
SP530M-72HB	530 W	49.38	13.68	40.68	13.03	≈20.5%	498 W	Apr 3, 2023
SP535M-72HB	535 W	49.48	13.75	40.77	13.13	≈20.7%	503 W	Apr 3, 2023
SP540M-72HB	540 W	49.58	13.82	40.86	13.22	≈20.9%	508 W	Apr 3, 2023
SP545M-72HB	545 W	49.68	13.89	40.95	13.31	≈21.1%	512 W	Apr 3, 2023
SP550M-72HB	550 W	49.78	13.96	41.04	13.41	≈21.3%	517 W	Apr 3, 2023
SP555M-72HB	555 W	49.88	14.03	41.13	13.50	≈21.5%	522 W	Apr 3, 2023
SP560M-72HB	560 W	49.98	14.10	41.22	13.59	≈21.7%	527 W	Apr 3, 2023
SP565M-72HB	565 W	50.08	14.17	41.31	13.68	≈21.9%	532 W	Apr 3, 2023
SP570M-72HB	570 W	50.18	14.24	41.40	13.77	≈22.1%	536 W	Apr 3, 2023

≈ efficiency = Pmax ÷ CEC-listed area 2.17 m².

Build & dimensions

CEC PV Module List (Oct 7, 2026)

Module area2.58 m² (27.8 ft²)CEC-listed area
Cells144 half-cut cells
Back coverBlack backsheet
FrameBlack frame

Heat & cold behaviour

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

	CEC listing test
Pmax coefficient γ	−0.304 %/°C
Voc coefficient β	−0.260 %/°C
Isc coefficient α	+0.054 %/°C
Operating cell temperature	NOCT 45.8 °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	330.1 W	38.36 V × 8.6 A	85.5 W	98%
440 W	333.9 W	38.55 V × 8.66 A	86.4 W	98%
445 W	337.7 W	38.74 V × 8.72 A	87.4 W	98%
450 W	341.5 W	38.93 V × 8.77 A	88.4 W	98%
455 W	345 W	39.12 V × 8.82 A	89.3 W	98%
460 W	348.9 W	39.3 V × 8.88 A	90.3 W	98%
465 W	352.8 W	39.49 V × 8.93 A	91.3 W	98%
470 W	356.7 W	39.68 V × 8.99 A	92.4 W	98%
520 W	393.9 W	38.55 V × 10.22 A	102.2 W	98%
525 W	397.6 W	38.64 V × 10.29 A	103.1 W	98%
530 W	401.2 W	38.72 V × 10.36 A	104.1 W	98%
535 W	405.2 W	38.81 V × 10.44 A	105.1 W	98%
540 W	408.9 W	38.9 V × 10.51 A	106.1 W	98%
545 W	412.6 W	38.98 V × 10.58 A	107 W	98%
550 W	416.6 W	39.07 V × 10.66 A	108.1 W	98%
555 W	420.3 W	39.15 V × 10.74 A	109 W	98%
560 W	424 W	39.24 V × 10.81 A	110 W	98%
565 W	427.8 W	39.32 V × 10.88 A	111 W	98%
570 W	431.5 W	39.41 V × 10.95 A	111.9 W	98%

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

52.2 V

Voc when cold

per panel

33.5 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 IQ8X-80-M-US	320–540 W	79.5 V	43–60 V	52.2 / 33.5 V	✗ Not a match: module voltage below MPPT range	1.38
APsystems (Alt Power System) DS3-L	265–570 W	60 V	28–45 V	52.2 / 33.5 V	✓ Within range	0.67

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	880	11,439	6.08
Palmdale	1,835	963	12,524	6.69
Chula Vista	1,696	890	11,575	6.11
Huntington Beach	1,643	863	11,213	5.89
Riverside	1,696	890	11,575	6.21
Santa Clarita	1,724	905	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 525 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)
Sunpal Power SP525M-72HB	525 W	≈20.3%	−0.304	49.28	13.61	—	—
SEG Solar SEG-525-BTD-BG	525 W	≈26.9%	−0.290	41.1	16.2	product 2023, 2024, 2025, 2026	8
JA Solar JAM72D30-530/MB	530 W	≈21%	−0.330	49.3	13.72	product 2023, 2024	3
Canadian Solar CS6W-525MB-AG	525 W	≈20.4%	−0.324	48.6	13.75	product 2024	1

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 Sunpal Power SP525M-72HB?

Calculated from the panel area (2.58 m²): about 20.3% for the 525 W class. 525 W over 2.58 m² equals about 203 W per square meter.

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

PVWatts v8 with typical-year weather gives about 880 kWh per year per 525 W panel in Los Angeles and about 963 kWh in Palmdale (20° roof, facing south, 14% system losses).

How much power does it lose on a hot roof?

With γ = −0.304 %/°C, at a 77 °C cell temperature (hottest modeled hour in Palmdale) output is about 15.8% 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 = 52.2 V, Vmp at 74 °C cell = 33.5 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 52.2 V vs max input 60 V; Vmp when hot 33.5 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).
SEG Solar — manufacturer datasheet “XXXTFHTPMBSDPN YUKON/Series )BMG$FMM/5ZQF501$PO”.
Canadian Solar — datasheet BiHiKu6 BIFACIAL MONO PERC CS6W-520|525|530|535|540|545|550MB-AG.
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).