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Sunova Brand review

TS-BWT66(705)-G12

705 Wp TOPCon Bifacial 80%
ComparePV verdict

Light for its output, needs the roof space

Rank 678 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)
-0.290
Typical · median -0.290
Weight (kg)
33.9
Strong · 4.1 kg below median
Warranty (yrs)
30
Typical · median 30 yrs

The Sunova TS-BWT66-G12 series consists of modules designed to maximize energy yield from the same surface area - particularly in situations where every square meter of roof or ground space is valuable. The use of a bifacial design allows for the utilization of reflected light from the ground, which significantly improves energy production in ground-mounted systems, on flat roofs, and on light-colored surfaces. A key advantage is the TOPCon N-type cell technology, which minimizes losses and helps maintain high efficiency even in challenging operating conditions.

In comparison to competitors, it stands out due to its stable performance at high temperatures and good efficiency even with reduced sunlight - which is important in the Polish climate, where cloudy days and variable conditions are the norm. The series is also designed for long-term profitability thanks to extended power warranties, which makes it easier to plan the return on investment.

It is a good choice for PV farms, large commercial rooftops, and investors who want to extract more energy without expanding the size of their installations.

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 -0.290 -0.290 Typical 2,165
Weight per kWp 48.1 52.9 Strong · top 14% 2,052
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 · 2 caution
Best for

Utility-scale, commercial, cold-climate and hot-climate.

Not ideal for

Roofs where every square metre has to count and tight roof space.

Strengths
48.1 kg per kWp

Top 14% of the TOPCon 700-750 W segment, against a median of 52.9.

Watch-outs
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
  • At 22.7% efficiency, this panel is on par with typical TOPCon 700-750W modules
  • At 226.9 W/m², this panel generates 3.2 W/m² less per unit area than TOPCon 700-750W median (230.2 W/m²)
  • Temperature coefficient of -0.29%/°C matches the TOPCon 700-750W median
  • Weight of 33.9 kg (4.1 kg below TOPCon 700-750W median of 38.0 kg) allows easier transport and roof mounting
  • 80% bifaciality enables rear-side power generation, boosting yield by 4-12% on reflective surfaces

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 39.92 V · 17.66 A Operating point at max power
Voc · Isc 46.58 V · 18.80 A Sizes the string length
Max system voltage 1500 V Longer strings than 1000 V modules
Dimensions 2384×1303×35 mm · 3.11 m² of roof
Weight 33.9 kg Strong Strong · 4.1 kg below median
Cells 132 · TOPCon Monocrystalline
Bifaciality 80 % Rear output as a share of front
Coefficient Pmax -0.290 %/°C Typical median -0.290 of its segment
Coefficient Voc · Isc -0.280 · 0.040 %/°C
NOCT 45 °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 → 0.40 % First year, then annual

Datasheet charts

Open datasheet PDF

Measured curves published by Sunova 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.

Temperature Dependence of Isc, Voc, Pmax Temperature Dependence of Isc, Voc, Pmax 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
-0.290 %/°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.

Alternatives

All Sunova panels
Filter these
Size
Panel Power Eff. Temp. Weight Difference
Sunova TS-BWT66(705)-G12 705 W 22.70% -0.290 33.9 kg You are here
AIKO-A680-MDE72Mw 680 W 25.20% -0.260 29.0 kg Cooler, 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, +2.3 pp
AIKO-A695-MAE78Dw 695 W 24.90% -0.260 34.5 kg -10 W, cooler, +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, cooler, +2.1 pp
RS645~665S9B-132 (645W) 645 W 20.80% -0.354 33.0 kg -60 W, hotter, -1.9 pp
RS645~665S9B-132 (650W) 650 W 20.90% -0.354 33.0 kg -55 W, hotter, -1.8 pp
RS645~665S9B-132 (655W) 655 W 21.10% -0.354 33.0 kg -50 W, hotter, -1.6 pp
RS645~665S9B-132 (660W) 660 W 21.20% -0.354 33.0 kg Hotter, -1.5 pp, -5 yr warranty
RS645~665S9B-132 (665W) 665 W 21.40% -0.354 33.0 kg Hotter, -1.3 pp, -5 yr warranty
AIKO-A805-GRH78Dw 805 W 25.10% -0.260 39.8 kg +100 W, heavier, +2.4 pp
AIKO-A800-GRH78Dw 800 W 24.90% -0.260 39.8 kg +95 W, heavier, +2.2 pp
AIKO-A795-GRH78Dw 795 W 24.80% -0.260 39.8 kg +90 W, heavier, +2.1 pp
AIKO-A790-GRH78Dw 790 W 24.60% -0.260 39.8 kg +85 W, heavier, +1.9 pp

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Common questions

6 answered
Are Sunova TS-BWT66-G12 panels suitable for flat roofs?
Yes, the bifacial design of this series works especially well on flat roofs, where modules are mounted at an angle that allows reflected light from a light-colored surface to reach the rear side of the panel. This can provide an additional energy yield without expanding the installation footprint, which matters when roof space is limited.
What warranty applies to Sunova TS-BWT66-G12 panels?
The manufacturer offers a 15-year product warranty and a 30-year power warranty, guaranteeing a minimum performance level over the module's lifetime. This warranty structure helps investors plan their return on investment and is consistent with what is expected from modern N-type modules.
How does TOPCon cell technology differ from standard PERC cells?
The N-type TOPCon cells used in the TS-BWT66-G12 series have lower recombination losses than traditional P-type PERC cells, resulting in higher efficiency and a smaller power drop at high temperatures. In practice this means more stable energy output in summer and better performance under low-irradiance conditions, such as cloudy days.
What is the maximum power output of the TS-BWT66-G12 series?
Modules in this series reach up to 720 Wp, placing them among high-power modules intended mainly for large-scale installations such as PV farms and extensive commercial or industrial rooftops. A higher per-module power output reduces the number of panels needed to reach a target system capacity.
Do Sunova bifacial panels require special mounting?
To fully utilize bifacial technology, modules are best mounted on structures that allow light to reach the rear side, such as elevated ground-mount racking or light-colored reflective roof surfaces. Standard mounting on a typical sloped roof is also possible, though the dual-sided energy gain will be more limited in that case.
Is Sunova a Tier 1 manufacturer?
Sunova, headquartered in China, is not currently listed among Tier 1 manufacturers, which is worth considering when assessing project financing risk, for example when applying for a loan or lease. This does not directly affect the module's technical specifications or the terms of the product and power warranty.
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