Illustration · 132 half-cut cells

Solar panelTSEC

TSEC TS66-BMH-495 H1

Name: TSEC TS66-BMH-495 H1
Brand: TSEC

132 half-cut cells. Power classes 480–510 W in the CEC list.

CEC listed · Feb 13, 2023UL 61730

Power class

Power (STC)495 WCEC nameplate
Efficiency≈21.1%calculated from area
%/°C Pmax−0.380CEC listing test
PTC / STC92.7%PTC 459 W (CEC)

Power classes

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

Model	Pmax	Voc, V	Isc, A	Vmp, V	Imp, A	Efficiency	PTC	CEC listed
TS66-BMH-480 H1	480 W	44.95	13.59	37.78	12.71	≈20.4%	445 W	Feb 13, 2023
TS66-BMH-485 H1	485 W	45.10	13.67	37.93	12.79	≈20.6%	449 W	Feb 13, 2023
TS66-BMH-490 H1	490 W	45.25	13.74	38.08	12.87	≈20.9%	454 W	Feb 13, 2023
TS66-BMH-495 H1	495 W	45.40	13.82	38.23	12.95	≈21.1%	459 W	Feb 13, 2023
TS66-BMH-500 H1	500 W	45.55	13.90	38.38	13.03	≈21.3%	464 W	Feb 13, 2023
TS66-BMH-505 H1	505 W	45.70	13.97	38.53	13.11	≈21.5%	468 W	Feb 13, 2023
TS66-BMH-510 H1	510 W	45.85	14.04	38.68	13.19	≈21.7%	473 W	Feb 13, 2023

≈ efficiency = Pmax ÷ CEC-listed area 2.35 m².

Heat & cold behaviour

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

	CEC listing test
Pmax coefficient γ	−0.380 %/°C
Voc coefficient β	−0.290 %/°C
Isc coefficient α	+0.050 %/°C
Operating cell temperature	NOCT 45.2 °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
480 W	345.4 W	33.88 V × 10.19 A	88.6 W	92%
485 W	348.9 W	34.02 V × 10.26 A	89.5 W	92%
490 W	352.5 W	34.15 V × 10.32 A	90.4 W	92%
495 W	356.1 W	34.29 V × 10.39 A	91.3 W	92%
500 W	359.7 W	34.42 V × 10.45 A	92.2 W	92%
505 W	363.3 W	34.55 V × 10.51 A	93.2 W	92%
510 W	367 W	34.69 V × 10.58 A	94.1 W	92%

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

48.4 V

Voc when cold

per panel

30.2 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	2–12
Solis (Ginlong) S6-EH1P10K-H-US	600 V	80–520 V	datasheet	3–12
Solis (Ginlong) Solis-1P7.6K-4G-US	600 V	100–500 V	datasheet	4–12
Qcells Q.VOLT H7.6SX	498 V	234–498 V	CEC test window	8–10

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	48.4 / 30.2 V	✗ Not a match: module voltage below MPPT range	1.3
APsystems (Alt Power System) DS3-L	265–570 W	60 V	28–45 V	48.4 / 30.2 V	✓ Within range	0.63
Enphase IQ8A-72-2-US	295–500 W	60 V	32–45 V	48.4 / 30.2 V	⚠ Works; below MPPT at peak heat	1.42

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	830	11,615	6.08
Palmdale	1,835	908	12,717	6.69
Chula Vista	1,696	840	11,753	6.11
Huntington Beach	1,643	813	11,386	5.89
Riverside	1,696	840	11,753	6.21
Santa Clarita	1,724	853	11,947	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 495 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)
TSEC TS66-BMH-495 H1	495 W	≈21.1%	−0.380	45.4	13.82	—
SEG Solar SEG-495-BTD-BG	495 W	≈25.3%	−0.290	39.9	15.82	8
Qcells Q.PEAK DUO XL-G10.d 495	495 W	≥21.4%	−0.340	53.71	11.34	6
AXITEC AC-530MH/144V	530 W	≥20.5%	−0.366	49.3	13.72	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 TSEC TS66-BMH-495 H1?

Calculated from the panel area (2.35 m²): about 21.1% for the 495 W class. 495 W over 2.35 m² equals about 211 W per square meter.

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

PVWatts v8 with typical-year weather gives about 830 kWh per year per 495 W panel in Los Angeles and about 908 kWh in Palmdale (20° roof, facing south, 14% system losses).

How much power does it lose on a hot roof?

With γ = −0.380 %/°C, at a 77 °C cell temperature (hottest modeled hour in Palmdale) output is about 19.7% 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 = 48.4 V, Vmp at 74 °C cell = 30.2 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 48.4 V vs max input 60 V; Vmp when hot 30.2 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”.
Qcells — manufacturer datasheet “Q.PEAK DUO XL-G10.d ENDURING HIGH PERFORMANCE”.
AXITEC — datasheet AXIworldbipremium bifacial 144 cells asemmbled in US.
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).