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Sunova Brand review

TS-BGT78(620)

620 Wp N-type Bifacial 80%
ComparePV verdict

Middle of its segment, needs the roof space

Rank 2,833 of 14,005
Compare panels Datasheet PDF
Power (Wp)
620
Typical for its class
Efficiency (%)
22.20
Weak · bottom 16%
Density (Wp/m²)
221.9
Weak · bottom 15%
Temp (%/°C)
-0.290
Typical · median -0.290
Weight (kg)
34.0
Weak · 1.5 kg above median
Warranty (yrs)
30
Typical · median 30 yrs

The Sunova TS-BGT78 series are bifacial dual-glass modules engineered for high energy production, even under non-optimal conditions. The use of N-type monocrystalline cells helps minimize typical losses found in many standard solutions, while bifacial technology allows for the actual utilization of reflected light off the substrate - particularly effective on light-coloured roofs, membranes, and ground-level structures. In practice, this means more stable system performance and a better energy yield throughout the year, without relying solely on theoretical parameters.

The TS-BGT78 stands out from the competition due to its glass-glass construction, which enhances environmental resilience and supports long-term reliability. The manufacturer also highlights excellent low-light performance and solutions reducing the risk of micro-cracking, thanks to multiple electroluminescence tests. This makes it an excellent choice for commercial and industrial installations, utility-scale PV farms, and projects where the predictability of energy yield and long-term durability are key considerations.

Ranking

359 panels in the segment N-type 600-650 W
Metric This panel Median Position in segment Overall rank
Module efficiency 22.20% 22.77% Weak · bottom 16% 5,817
Power density 221.9 227.7 Weak · bottom 15% 5,859
Temperature coefficient -0.290 -0.290 Typical 2,165
Weight per kWp 54.8 52.7 Weak · bottom 22% 9,232
Performance warranty 30 yrs 30 yrs Typical 21
Colour key Strong - top 25% Typical - middle 50% Weak - bottom 25%

Signals from the data

0 positive · 3 caution
Best for

Commercial, utility-scale and hot-climate.

Not ideal for

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

Watch-outs
221.9 watts per square metre

Bottom 15% of the N-type 600-650 W segment, against a median of 227.7.

22.20% module efficiency

Bottom 16% of the N-type 600-650 W segment, against a median of 22.77%.

54.8 kg per kWp

Bottom 22% of the N-type 600-650 W segment, against a median of 52.7.

Notes from the database
  • At 22.2% efficiency, this panel is 0.6pp below the N-type 600-650W median of 22.8%
  • At 221.9 W/m², this panel generates 5.8 W/m² less per unit area than N-type 600-650W median (227.7 W/m²)
  • At -0.29%/°C, hot weather performance is typical for N-type 600-650W panels
  • At 34.0 kg (1.5 kg above N-type 600-650W median of 32.5 kg), requires checking roof load capacity
  • 80% bifaciality enables rear-side power generation, boosting yield by 4-12% on reflective surfaces

Specifications

Open datasheet PDF
Nominal power (Pmax) 620 Wp Nameplate at 1000 W/m², 25 °C
Module efficiency 22.20 % Weak Segment median 22.77%
Vmpp · Impp 47.44 V · 13.07 A Operating point at max power
Voc · Isc 55.99 V · 13.74 A Sizes the string length
Max system voltage 1500 V Longer strings than 1000 V modules
Dimensions 2464×1134×35 mm · 2.79 m² of roof
Weight 34.0 kg Weak Weak · 1.5 kg above median
Cells 156 · N-type 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 542 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 620 Wp appear here. The rest cover the whole series.

Linear Performance Warranty Linear Performance Warranty 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-BGT78(620) 620 W 22.20% -0.290 34.0 kg You are here
AIKO-A650-MAE72Mw 650 W 25.20% -0.260 27.0 kg +30 W, lighter, +3.0 pp
AIKO-A645-MAE72Mw 645 W 25.00% -0.260 27.0 kg Cooler, lighter, +2.8 pp
AIKO-G670-MCH72Mw 670 W 24.80% -0.260 28.2 kg +50 W, lighter, +2.6 pp
LR7-72HVHF-670M 670 W 24.80% -0.260 28.5 kg +50 W, lighter, +2.6 pp
AIKO-A640-MAE72Mw 640 W 24.80% -0.260 27.0 kg Cooler, lighter, +2.6 pp
JKM650-670N-66QL6-BDV (670W class) 670 W 24.80% -0.260 32.5 kg +50 W, cooler, +2.6 pp
TS-BW78(575) 575 W 20.60% -0.330 29.0 kg Lighter, -1.6 pp, -5 yr warranty
TS-BW78(580) 580 W 20.70% -0.330 29.0 kg Lighter, -1.5 pp, -5 yr warranty
TS-BW78(585) 585 W 20.90% -0.330 29.0 kg Lighter, -1.3 pp, -5 yr warranty
TS-BW78(590) 590 W 21.10% -0.330 29.0 kg Lighter, -1.1 pp, -5 yr warranty
TS-BW78(595) 595 W 21.30% -0.330 29.0 kg Lighter, -0.9 pp, -5 yr warranty
TS-BBT78(615) 615 W 22.00% -0.290 29.0 kg Lighter
TS-BGT78(615) 615 W 22.00% -0.290 34.0 kg Very close match
TS-BBT78(620) 620 W 22.20% -0.290 29.0 kg Lighter
TS-BBT78(625) 625 W 22.40% -0.290 29.0 kg Lighter
AIKO-A680-MDE72Mw 680 W 25.20% -0.260 29.0 kg +60 W, lighter, +3.0 pp

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Common questions

6 answered
What is the maximum power output of Sunova TS-BGT78 panels?
The TS-BGT78 series reaches a maximum power output of up to 640 Wp, placing it among high-power modules designed for commercial, industrial, and utility-scale PV installations. Higher unit power reduces the number of panels needed to reach a target system size, which lowers costs for mounting structures and cabling.
What is bifacial technology in TS-BGT78 panels and is it worth it?
TS-BGT78 panels are bifacial, meaning they generate power from reflected light hitting the rear side of the module as well. This works best on light-colored roofs, white roofing membranes, and ground-mount installations with reflective surfaces such as gravel or snow. The additional rear-side energy gain can range from a few to over ten percent depending on installation conditions.
What warranty comes with Sunova TS-BGT78 panels?
The manufacturer provides a 15-year product warranty and a 30-year linear power output warranty. This offers long-term protection against manufacturing defects as well as gradual power degradation, which is important when calculating the return on investment for commercial installations over several decades.
How do N-type cells in TS-BGT78 differ from standard P-type cells?
The monocrystalline N-type cells used in TS-BGT78 exhibit lower light-induced degradation (LID) compared to more common P-type cells. This results in more stable performance during the first years of operation and better output under low-light conditions, which matters especially in regions with variable annual irradiance.
Are TS-BGT78 panels suited for roof or ground-mount installations?
The glass-glass construction and bifacial design make TS-BGT78 particularly well suited for ground-mount installations and flat roofs with light-colored membranes, where the module can capture reflected light. The manufacturer targets this series mainly at commercial, industrial, and utility-scale PV projects rather than typical residential sloped roofs.
Does the glass-glass construction of TS-BGT78 improve panel durability?
Yes, the dual-glass (glass-glass) design replaces the standard backsheet laminate and improves resistance to moisture, UV exposure, and microcracks in the cells. This construction is commonly used in premium bifacial modules and results in lower long-term power degradation, supported by the manufacturer's 30-year linear power warranty.
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