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Sunova Brand review

TS-BG66(505)

505 Wp PERC Bifacial 70%
ComparePV verdict

Space saver, no clear weak spot

Rank 8,056 of 14,005
Compare panels Datasheet PDF
Power (Wp)
505
Weak · bottom 11%
Efficiency (%)
21.27
Strong · top 7%
Density (Wp/m²)
212.7
Strong · top 6%
Temp (%/°C)
-0.330
Strong · top 8%
Weight (kg)
28.5
Typical · median 28.4 kg
Warranty (yrs)
30
Typical · median 30 yrs

The Sunova TS-BG66 series is designed for maximum energy yield in situations where every square meter of roof space counts. The use of a bifacial design allows the module to utilize not only direct sunlight, but also reflected light - which significantly improves production in installations on light-colored roofs, membranes, and ground-mounted structures. A key advantage is the double-glass construction, which increases resistance to micro-cracks, moisture, and varying weather conditions, particularly important in the Polish climate.

The TS-BG66 also features a anti-reflective coating, which helps maintain stable performance under strong sunlight and at large angles of incidence. Thanks to the half-cell design, the module is better able to cope with partial shading and reduces heat loss, resulting in more predictable yields.

It is a good choice for premium home installations, commercial flat roofs, and PV farms, where durability, a longer lifespan, and greater tolerance for installation conditions are important.

Ranking

706 panels in the segment PERC 500-550 W
Metric This panel Median Position in segment Overall rank
Module efficiency 21.27% 20.90% Strong · top 7% 8,849
Power density 212.7 209.0 Strong · top 6% 8,757
Temperature coefficient -0.330 -0.350 Strong · top 8% 8,545
Weight per kWp 56.4 53.0 Typical 10,652
Performance warranty 30 yrs 30 yrs Typical 21
Colour key Strong - top 25% Typical - middle 50% Weak - bottom 25%

Signals from the data

3 positive · 0 caution
Best for

Residential, commercial and shaded-installations.

Strengths
212.7 watts per square metre

Top 6% of the PERC 500-550 W segment, against a median of 209.0. Ranked 8,757th in the whole database.

21.27% module efficiency

Top 7% of the PERC 500-550 W segment, against a median of 20.90%. Ranked 8,849th in the whole database.

-0.330 %/°C temperature coefficient

Top 8% of the PERC 500-550 W segment, against a median of -0.350. Ranked 8,545th in the whole database.

Notes from the database
  • At 21.3% efficiency, this panel is on par with typical PERC 500-550W modules
  • 212.7 W/m² power density - 3.7 W/m² more than PERC 500-550W median (209.0 W/m²), more power per roof area
  • Temperature coefficient of -0.33%/°C matches the PERC 500-550W median
  • Bifaciality factor of 70% can add 4-10% extra yield with reflective mounting surface
  • Ranked #8849 out of 14005 panels for efficiency in the database

Specifications

Open datasheet PDF
Nominal power (Pmax) 505 Wp Nameplate at 1000 W/m², 25 °C
Module efficiency 21.27 % Strong Segment median 20.90%
Vmpp · Impp 37.53 V · 13.46 A Operating point at max power
Voc · Isc 45.54 V · 13.95 A Sizes the string length
Max system voltage 1500 V Longer strings than 1000 V modules
Dimensions 2094×1134×35 mm · 2.37 m² of roof
Weight 28.5 kg Typical Typical · median 28.4 kg
Cells 132 · PERC Monocrystalline
Bifaciality 70 % Rear output as a share of front
Coefficient Pmax -0.330 %/°C Strong top 8% of its segment
Coefficient Voc · Isc -0.260 · 0.060 %/°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 85.0 % Equals 429 W guaranteed
Degradation 2.00 → 0.45 % First year, then annual

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
-0.330 %/°C against a segment median of -0.350
-
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-BG66(505) 505 W 21.27% -0.330 28.5 kg You are here
LR7-54HJD-510M 510 W 25.00% -0.240 23.5 kg Cooler, lighter, +3.7 pp
AIKO-A495-MCE54Mw 495 W 24.80% -0.260 21.0 kg Cooler, lighter, +3.5 pp
LR7-54HJD-505M 505 W 24.70% -0.240 23.5 kg Cooler, lighter, +3.4 pp
LR7-60HVH-555M 555 W 24.60% -0.260 25.0 kg +50 W, cooler, +3.3 pp
AIKO-A490-MCE54Mw 490 W 24.50% -0.260 21.0 kg Cooler, lighter, +3.2 pp
LR7-54HJD-500M 500 W 24.50% -0.240 23.5 kg Cooler, lighter, +3.2 pp
RS480~500S8-132GA-480 480 W 20.20% -0.353 29.5 kg -25 W, hotter, -1.1 pp
RS480~500S8-132GA-485 485 W 20.40% -0.353 29.5 kg -20 W, hotter, -0.9 pp
TS-BB66(490) 490 W 20.64% -0.330 25.3 kg Lighter, -0.6 pp, -5 yr warranty
TS-BB66(495) 495 W 20.85% -0.330 25.3 kg Lighter, -0.4 pp, -5 yr warranty
GKA120N-PRO-590W 590 W 23.82% -0.300 26.7 kg +85 W, cooler, +2.6 pp
GKA120N-PRO-585W 585 W 23.62% -0.300 26.7 kg +80 W, cooler, +2.4 pp
BGO 580 580 W 23.50% -0.290 26.0 kg +75 W, cooler, +2.2 pp
GKA120N-PRO-580W 580 W 23.42% -0.300 26.7 kg +75 W, cooler, +2.2 pp

Found 397 panels of the same or similar size to this one, within ±10 mm. See them here Found 408 panels of the same or similar size to this one, within ±25 mm. See them here Found 425 panels of the same or similar size to this one, within ±50 mm. See them here Found 953 panels of the same or similar size to this one, within ±100 mm. See them here

Common questions

6 answered
Are Sunova TS-BG66 panels suitable for flat roofs with a light-colored membrane?
Yes, this is one of the series' main use cases. The bifacial design captures light reflected off light-colored membranes and ground-mounted surfaces, boosting energy yield by several to over ten percent compared to a monofacial module installed under the same conditions.
What warranty comes with Sunova TS-BG66 modules?
The manufacturer provides a 15-year product warranty and a 30-year linear power output warranty. This means the panel should maintain high efficiency throughout the system's lifetime, offering predictable returns over several decades of operation.
How does bifacial technology in the TS-BG66 differ from standard PERC panels?
A standard PERC panel generates power only from its front side. The TS-BG66 uses PERC cells in a bifacial configuration, so the rear side also produces energy from reflected light. This delivers an extra power gain in practice, especially on light-colored roofs or ground-mount arrays with adequate clearance.
How much power does a single Sunova TS-BG66 panel produce?
The maximum output is 505 Wp. That's a high value for a standard panel format, meaning fewer modules are needed to reach a target system size, which reduces the number of mounting points and shortens installation time.
Does the dual-glass construction in the TS-BG66 add weight and complicate installation?
Dual-glass panels are somewhat heavier than standard modules with a rear backsheet, but this is fully offset by greater resistance to microcracks, moisture, and mechanical damage. Installation uses standard mounting systems compatible with the module frame, with no additional structural requirements.
Is Sunova a Tier 1 brand, and where is it manufactured?
Sunova is a Chinese manufacturer, but the TS-BG66 series does not currently hold Tier 1 status under the BloombergNEF classification. This does not indicate lower module quality, only different financial classification criteria. It's worth considering when comparing loan bankability options for the installation.
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