Illustration · 132 half-cut cells

Solar panelThornova Solar

Thornova Solar TS-BGT66(605)-G12R

Name: Thornova Solar TS-BGT66(605)-G12R
Brand: Thornova Solar

132 half-cut cells, bifacial, glass (dual-glass module). Power classes 595–620 W in the CEC list.

CEC listed · Feb 2, 2026UL 61730Bifacial

Power class

Power (STC)605 WCEC nameplate
Efficiency≈22.6%calculated from area
%/°C Pmax−0.299CEC listing test
PTC / STC95%PTC 575 W (CEC)

Power classes

CEC PV Module List (Oct 7, 2026) · Cali-Graf calculation · 6 models

Model	Pmax	Voc, V	Isc, A	Vmp, V	Imp, A	Efficiency	PTC	CEC listed
TS-BGT66(595)-G12R	595 W	48.10	15.76	40.00	14.89	≈22.2%	565 W	Feb 2, 2026
TS-BGT66(600)-G12R	600 W	48.40	15.80	40.30	14.91	≈22.4%	570 W	Feb 2, 2026
TS-BGT66(605)-G12R	605 W	48.70	15.83	40.50	14.94	≈22.6%	575 W	Feb 2, 2026
TS-BGT66(610)-G12R	610 W	49.00	15.86	40.80	14.96	≈22.8%	580 W	Feb 2, 2026
TS-BGT66(615)-G12R	615 W	49.30	15.89	40.98	14.98	≈22.9%	584 W	Feb 2, 2026
TS-BGT66(620)-G12R	620 W	49.60	15.92	41.22	15.03	≈23.1%	589 W	Feb 2, 2026

≈ efficiency = Pmax ÷ CEC-listed area 2.68 m².

Build & dimensions

CEC PV Module List (Oct 7, 2026)

Module area2.68 m² (28.8 ft²)CEC-listed area
Cells132 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	−0.299 %/°C
Voc coefficient β	−0.205 %/°C
Isc coefficient α	+0.043 %/°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
595 W	445.7 W	38.89 V × 11.46 A	116.5 W	98%
600 W	449.6 W	39.18 V × 11.47 A	117.5 W	98%
605 W	452.8 W	39.38 V × 11.5 A	118.3 W	98%
610 W	456.7 W	39.67 V × 11.51 A	119.4 W	98%
615 W	459.4 W	39.85 V × 11.53 A	120.1 W	98%
620 W	463.6 W	40.08 V × 11.57 A	121.2 W	98%

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

Independent reliability testing

Kiwa PVEL Scorecard · RETC PV Module Index

PVEL Scorecards

Thornova Solar named Top Performer, 2024–2026

2026

RETC Overall Highest Achiever

Thornova Solar, manufacturer level

This exact series is not listed in published PVEL Top Performer tables. Results below are for the manufacturer.

RETC PV Module Index — Thornova Solar

Year	Recognition
2026	Overall Highest Achiever; High achievement in performance; High achievement in reliability; Performance discipline high achiever (PAN file, Temperature coefficient, Iam, Letid, Lid); Quality discipline high achiever (BOM verification); Reliability discipline high achiever (Pid, Sdml, Tc, Uvid)

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

51 V

Voc when cold

per panel

33.7 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)

No microinverter in the reference set lists this power class in its recommended module power range.

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	1,014	12,168	6.08
Palmdale	1,835	1,110	13,322	6.69
Chula Vista	1,696	1,026	12,313	6.11
Huntington Beach	1,643	994	11,928	5.89
Riverside	1,696	1,026	12,313	6.21
Santa Clarita	1,724	1,043	12,516	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 605 W panels

CEC PV Module List (Oct 7, 2026) · Kiwa PVEL Scorecard · building permits

Panel	Pmax	Efficiency	γ Pmax (CEC)	Voc, V	Isc, A	PVEL (product / brand)	SoCal permits (series)
Thornova Solar TS-BGT66(605)-G12R	605 W	≈22.6%	−0.299	48.7	15.83	brand 3×	—
Phono Solar PS605M8GFH-24/TNH	605 W	≈23.6%	−0.293	53.6	13.96	product 2024, 2025	1
Qcells Q.PEAK DUO XL-G11S.3/BFG 600	600 W	≈22.1%	−0.348	53.66	13.8	product 2024, 2025, 2026	1
VSUN (Vietnam Sunergy) VSUN600N-144MH	600 W	≈23.3%	−0.309	52.9	14.03	brand 6× (2021–2026)	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.

About Thornova Solar

CEC PV Module List (Oct 7, 2026) · Kiwa PVEL Scorecard · RETC PV Module Index

ManufacturerThornova Solar
Listed in CEC asThornova Solar
PVEL Top Performer (manufacturer)3 Scorecards (2024–2026)
RETC PV Module Index2026
Current panel series in CEC list22

Other series by SoCal permits

TS-BBT54(xxx)-G12RTS-BGT48(xxx)-G12RTS-BGT54(xxx)-G12RTS-BB54(xxx)TS-BB60(xxx)TS-BBT54(xxx)

Questions & answers

How efficient is the Thornova Solar TS-BGT66(605)-G12R?

Calculated from the panel area (2.68 m²): about 22.6% for the 605 W class. 605 W over 2.68 m² equals about 226 W per square meter.

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

PVWatts v8 with typical-year weather gives about 1,014 kWh per year per 605 W panel in Los Angeles and about 1,110 kWh in Palmdale (20° roof, facing south, 14% system losses).

How much power does it lose on a hot roof?

With γ = −0.299 %/°C, at a 77 °C cell temperature (hottest modeled hour in Palmdale) output is about 15.5% 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 = 51 V, Vmp at 74 °C cell = 33.7 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.

Has this panel been reliability-tested?

This exact series is not in published PVEL Top Performer tables; Thornova Solar was named a Top Performer in 3 Scorecards (2024–2026). RETC named Thornova Solar Overall Highest Achiever in 2026.

Sources

California Energy Commission — Solar Equipment Lists, PV Module List, Inverter List (snapshot Oct 7, 2026).
Kiwa PVEL — PV Module Reliability Scorecard, Top Performer lists 2024–2026.
RETC — PV Module Index report.
NLR (formerly NREL) — System Advisor Model CEC module and inverter libraries (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 — 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).