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TCL Zhonghuan Brand review

HSM-ND66-GK705 (IEC1500V)

705 Wp TOPCon Bifacial 80%
ComparePV verdict

Strong in heat, heavy for its output

Rank 747 of 14,005
Compare panels Datasheet PDF
Power (Wp)
705
Weak · bottom 22%
Efficiency (%)
22.70
Weak · bottom 23%
Density (Wp/m²)
227.0
Weak · bottom 21%
Temp (%/°C)
-0.280
Strong · top 11%
Weight (kg)
38.2
Weak · bottom 17%
Warranty (yrs)
30
Typical · median 30 yrs

The TCL Zhonghuan G12-66P series is designed for projects where high energy production and a proven module structure are paramount. This panel features a double-glass and bifacial design, which maximizes the use of reflected light from the ground - effectively increasing energy yield without increasing the installation area. The use of N-type cells in TOPCon technology ensures stable performance over time and better resistance to typical degradation effects, which is crucial for investments with a long-term return horizon.

In practice, the G12-66P stands out for its reliability in challenging conditions. This series is specifically targeted at PV farms and ground-mounted installations, where resistance to wind, dust, and environmental factors is essential. It is a good choice for developers and EPCs who want to combine high power density with easy integration into standard projects and predictable module performance over the years.

Ranking

420 panels in the segment TOPCon 700-750 W
Metric This panel Median Position in segment Overall rank
Module efficiency 22.70% 23.00% Weak · bottom 23% 3,307
Power density 227.0 230.2 Weak · bottom 21% 3,361
Temperature coefficient -0.280 -0.290 Strong · top 11% 1,309
Weight per kWp 54.2 52.9 Weak · bottom 17% 8,415
Performance warranty 30 yrs 30 yrs Typical 21
Colour key Strong - top 25% Typical - middle 50% Weak - bottom 25%

Signals from the data

1 positive · 3 caution
Best for

Utility-scale.

Not ideal for

Weight-limited structures, roofs where every square metre has to count and tight roof space.

Strengths
-0.280 %/°C temperature coefficient

Top 11% of the TOPCon 700-750 W segment, against a median of -0.290.

Watch-outs
54.2 kg per kWp

Bottom 17% of the TOPCon 700-750 W segment, against a median of 52.9.

227.0 watts per square metre

Bottom 21% of the TOPCon 700-750 W segment, against a median of 230.2.

22.70% module efficiency

Bottom 23% of the TOPCon 700-750 W segment, against a median of 23.00%.

Notes from the database
  • Efficiency of 22.7% matches the TOPCon 700-750W median
  • Power density of 226.9 W/m² is 3.2 W/m² below TOPCon 700-750W median (230.2 W/m²) - needs more roof space
  • Temperature coefficient of -0.28%/°C matches the TOPCon 700-750W median
  • Bifacial design (80% factor) captures reflected light - adds 4-12% yield on ground-mount or white roof
  • In the top 24% for efficiency among all TOPCon panels

Specifications

Open datasheet PDF
Nominal power (Pmax) 705 Wp Nameplate at 1000 W/m², 25 °C
Module efficiency 22.70 % Weak Segment median 23.00%
Vmpp · Impp 40.50 V · 17.41 A Operating point at max power
Voc · Isc 48.48 V · 18.44 A Sizes the string length
Max system voltage 1500 V Longer strings than 1000 V modules
Dimensions 2384×1303×33 mm · 3.11 m² of roof
Weight 38.2 kg Weak Weak · bottom 17%
Cells 132 · TOPCon Monocrystalline
Bifaciality 80 % Rear output as a share of front
Coefficient Pmax -0.280 %/°C Strong top 11% of its segment
Coefficient Voc · Isc -0.240 · 0.045 %/°C
NOCT 43 °C At 800 W/m², 20 °C ambient
Product warranty 15 years Hardware defects only
Performance warranty 30 years Typical median 30 yrs · median 30 yrs
End-of-warranty output 87.4 % Equals 616 W guaranteed
Degradation 1.00 % First year

Datasheet charts

Open datasheet PDF

Measured curves published by TCL Zhonghuan in this model's datasheet. A chart carrying a wattage was measured on that variant alone - only the ones that describe 705 Wp appear here. The rest cover the whole series.

30-Year Linear Performance Warranty (power retention vs. years) 30-Year Linear Performance Warranty (power retention vs. years) Whole series

Simulations

Live - change any input
Lifetime output & value
30 years at 1200 kWh/kWp/year and €0.50 per kWh
Power in year 30
-
Lifetime energy
-
Energy value
-
With bifacial gain
-

Degradation from this panel's own datasheet figures. No inverter, soiling or shading losses.

Heat losses
-0.280 %/°C against a segment median of -0.290
-
Bifacial gain
Rear gain over light concrete: -
-

Model: bifaciality × albedo × 0.6 view factor. A first-order estimate, not a yield simulation.

Filter these
Size
Panel Power Eff. Temp. Weight Difference
TCL Zhonghuan HSM-ND66-GK705 (IEC1500V) 705 W 22.70% -0.280 38.2 kg You are here
AIKO-A680-MDE72Mw 680 W 25.20% -0.260 29.0 kg -25 W, lighter, +2.5 pp
AIKO-A675-MDE72Mw 675 W 25.00% -0.260 29.0 kg -30 W, lighter, +2.3 pp
AIKO-A700-MAE78Dw 700 W 25.00% -0.260 34.5 kg Cooler, lighter, +2.3 pp
AIKO-A695-MAE78Dw 695 W 24.90% -0.260 34.5 kg Cooler, lighter, +2.2 pp
AIKO-G670-MCH72Mw 670 W 24.80% -0.260 28.2 kg -35 W, lighter, +2.1 pp
LR7-72HVHF-670M 670 W 24.80% -0.260 28.5 kg -35 W, lighter, +2.1 pp
JKM650-670N-66QL6-BDV (670W class) 670 W 24.80% -0.260 32.5 kg -35 W, lighter, +2.1 pp
HSM-ND66-GK700 700 W 22.50% -0.280 38.2 kg Very close match
HSM-ND66-GK710 710 W 22.90% -0.280 38.2 kg Very close match
HSM-ND66-GK715 (IEC1500V) 715 W 22.90% -0.280 38.2 kg +10 W
HSM-ND66-GK720 (IEC1500V) 720 W 23.00% -0.280 38.2 kg +15 W, +0.3 pp
AIKO-A805-GRH78Dw 805 W 25.10% -0.260 39.8 kg +100 W, cooler, +2.4 pp
AIKO-A800-GRH78Dw 800 W 24.90% -0.260 39.8 kg +95 W, cooler, +2.2 pp
AIKO-A795-GRH78Dw 795 W 24.80% -0.260 39.8 kg +90 W, cooler, +2.1 pp
AIKO-A790-GRH78Dw 790 W 24.60% -0.260 39.8 kg +85 W, cooler, +1.9 pp
TSM-NEG21C.20Q-760 760 W 24.50% -0.260 38.3 kg +55 W, cooler, +1.8 pp

Found 1390 panels of the same or similar size to this one, within ±10 mm. See them here Found 1400 panels of the same or similar size to this one, within ±25 mm. See them here Found 1400 panels of the same or similar size to this one, within ±50 mm. See them here Found 1432 panels of the same or similar size to this one, within ±100 mm. See them here

Common questions

6 answered
What type of installation is the TCL Zhonghuan G12-66P series best suited for - ground-mount or rooftop?
The G12-66P is designed primarily for large ground-mount installations and utility-scale PV farms, where resistance to wind, dust, and environmental loads matters, along with high power density per area. The glass-glass construction handles demanding field conditions well. It can also be used in larger commercial installations, though it is not a typical choice for small pitched residential roofs due to the size and weight of large-format G12 modules.
What is the difference between the bifacial G12-66P panel and a standard monofacial panel?
The bifacial G12-66P generates energy from both the front and rear side of the module. Thanks to the glass-glass construction, the rear side captures light reflected off the ground, such as light gravel, bright soil, or reflective sheeting, which meaningfully increases energy yield without expanding the installation area. The actual gain depends on ground albedo and mounting height, but typically falls in the range of a few to over a dozen percent more annual energy.
What is TOPCon technology and why is it used in the G12-66P?
TOPCon (Tunnel Oxide Passivated Contact) is an N-type cell technology that delivers higher conversion efficiency, lower degradation over time, and more stable performance than older PERC-based solutions. N-type cells have lower sensitivity to light-induced degradation (LID) and LeTID, resulting in more predictable energy output throughout the system's lifetime - a key factor for investments with a long payback horizon.
What warranty does TCL Zhonghuan offer on the G12-66P modules?
The manufacturer offers a 15-year product warranty and a 30-year linear power output warranty. After 30 years of operation, the guaranteed performance is around 87.4% of the initial rated power, a result typical for modern N-type TOPCon modules and clearly better than older P-type technologies, which usually have higher annual degradation rates.
What is the maximum power of the G12-66P panel, and how many panels are needed for a typical system?
The maximum output of the G12-66P module is 725 Wp with efficiency up to 23.3%. Because of the high power per panel, fewer modules are needed to reach a given system capacity compared to panels rated at 400-450 Wp, lowering costs for mounting structures, cabling, and installation labor per kilowatt of installed capacity.
Is TCL Zhonghuan a reliable manufacturer of solar panels?
TCL Zhonghuan is one of the largest manufacturers of silicon wafers and solar modules in the world, headquartered in China, and classified as a Tier 1 manufacturer. This status reflects a stable financial position, large-scale production, and bankability for projects requiring external financing - an important factor for large PV farm investments and commercial installations that rely on lender-approved equipment.
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