Illustration · 108 half-cut cells

Solar panelTalesun

Talesun TM7G54M 450

Name: Talesun TM7G54M 450
Brand: Talesun

108 half-cut cells, bifacial. Power classes 405–450 W in the CEC list.

CEC listed · May 21, 2024UL 61730BifacialSeen in 1 SoCal permit

Power class

Power (STC)450 WCEC nameplate
Efficiency≈23.1%calculated from area
%/°C Pmax−0.320CEC listing test
PTC / STC94.7%PTC 426 W (CEC)

Power classes

CEC PV Module List (Oct 7, 2026) · Cali-Graf calculation · 10 models

Model	Pmax	Voc, V	Isc, A	Vmp, V	Imp, A	Efficiency	PTC	CEC listed
TM7G54M-405	405 W	38.00	13.50	31.00	13.08	≈20.8%	382 W	May 21, 2024
TM7G54M-410	410 W	38.20	13.57	31.20	13.15	≈21.0%	387 W	May 21, 2024
TM7G54M-415	415 W	38.40	13.64	31.40	13.22	≈21.3%	392 W	May 21, 2024
TM7G54M-420	420 W	38.60	13.71	31.60	13.30	≈21.5%	397 W	May 21, 2024
TM7G54M-425	425 W	38.80	13.78	31.80	13.37	≈21.8%	402 W	May 21, 2024
TM7G54M-430	430 W	39.00	13.67	32.68	13.16	≈22.1%	407 W	May 21, 2024
TM7G54M-435	435 W	39.20	13.94	32.20	13.51	≈22.3%	412 W	May 21, 2024
TM7G54M-440	440 W	39.30	13.77	32.94	13.36	≈22.6%	416 W	May 21, 2025
TM7G54M-445	445 W	39.45	13.82	33.07	13.46	≈22.8%	421 W	May 21, 2025
TM7G54M-450	450 W	39.60	13.87	33.20	13.56	≈23.1%	426 W	May 21, 2025

≈ efficiency = Pmax ÷ CEC-listed area 1.95 m².

Heat & cold behaviour

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

	CEC listing test
Pmax coefficient γ	−0.320 %/°C
Voc coefficient β	−0.238 %/°C
Isc coefficient α	+0.046 %/°C
Operating cell temperature	NOCT 43.3 °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
405 W	300.1 W	30.15 V × 9.96 A	79.5 W	98%
410 W	303.7 W	30.34 V × 10.01 A	80.4 W	98%
415 W	307.3 W	30.54 V × 10.06 A	81.4 W	98%
420 W	311.1 W	30.73 V × 10.12 A	82.4 W	98%
425 W	314.7 W	30.93 V × 10.18 A	83.4 W	98%
430 W	318.3 W	31.12 V × 10.23 A	84.3 W	98%
435 W	322 W	31.32 V × 10.28 A	85.3 W	98%
440 W	333.2 W	31.62 V × 10.54 A	88.3 W	100%
445 W	329.5 W	31.49 V × 10.46 A	87.3 W	98%
450 W	325.7 W	31.37 V × 10.38 A	86.3 W	96%

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

Certifications

CEC PV Module List (Oct 7, 2026) · Clean Energy Council (Australia)

UL 61730IEC 61215:2021 / IEC 61730:2023

UL 61730CEC listing
IEC 61215:2021 / IEC 61730:2023DEKRA Certification B.V., valid to May 2028

Independent reliability testing

Kiwa PVEL Scorecard · RETC PV Module Index

2025

PVEL Top Performer

closely related product name

Tests passed as Top Performer

DH, MSS, PID, TC

PVEL Scorecards

Talesun named Top Performer, 2017–2025

RETC PV Module Index

Talesun, 2024

PVEL Top Performer tests

Year	Product	Tests
2025	TM7G54M/xxxM (closely related product name)	DHMSSPIDTC

Tested bill of materials

PVEL-tested factoryChina
Cell technology (tested BOM)n-type TOPCon
Module design (tested BOM)bifacial - 2.0 glass//2.0 glass
Power class range tested430-475W

Details describe the tested sample, not every module of the series.

RETC PV Module Index — Talesun

Year	Recognition
2024	Test Category High Achiever

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

41.8 V

Voc when cold

per panel

27.2 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	3–14
Solis (Ginlong) S6-EH1P10K-H-US	600 V	80–520 V	datasheet	3–14
Solis (Ginlong) Solis-1P7.6K-4G-US	600 V	100–500 V	datasheet	4–14
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	41.8 / 27.2 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	41.8 / 27.2 V	⚠ Works; below MPPT at peak heat	0.58
Enphase IQ8M-72-2-US	260–460 W	60 V	30–45 V	41.8 / 27.2 V	⚠ Works; below MPPT at peak heat	1.38
Enphase IQ8A-72-2-US	295–500 W	60 V	32–45 V	41.8 / 27.2 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)
Talesun TM7G54M 450	450 W	≈23.1%	−0.320	39.6	13.87	brand 5×	1
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.

About Talesun

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

ManufacturerTalesun
Listed in CEC asSuzhou Talesun Solar Technologies Co., Ltd.
PVEL Top Performer (manufacturer)5 Scorecards (2017–2025)
RETC PV Module Index2024
Current panel series in CEC list34

Other series by SoCal permits

TM3F48MTM3F66MTM3G48MTM3G66MTM7F54MTM7F72M

Questions & answers

How efficient is the Talesun TM7G54M 450?

Calculated from the panel area (1.95 m²): about 23.1% for the 450 W class. 450 W over 1.95 m² equals about 231 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 = −0.320 %/°C, at a 77 °C cell temperature (hottest modeled hour in Palmdale) output is about 16.6% 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 3–14 panels per string (Voc at 2 °C = 41.8 V, Vmp at 74 °C cell = 27.2 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?

TM7G54M/xxxM was a PVEL Top Performer in 2025 (DH, MSS, PID, TC) — a closely related product name.

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 2017–2025.
RETC — PV Module Index report.
NLR (formerly NREL) — System Advisor Model CEC module and inverter libraries (version 2026.7.3).
Clean Energy Council (Australia) — Approved PV modules list (as of Oct 8, 2026).
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 — Los Angeles County Public Works (EPIC-LA, unincorporated areas) (Oct 2025). Equipment matched from permit descriptions by model number.
Cali-Graf calculations — formulas and inputs are shown next to each calculated value (efficiency from area, temperature-corrected voltages, string sizing, energy estimates).