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Sunpro Power SPDG655-N120M12
Sunpro Power Brand review

SPDG655-N120M12

655 Wp TOPCon Bifacial 1500%
ComparePV verdict

Solid all-round for its segment

Rank 408 of 14,005
Compare panels Datasheet PDF
Power (Wp)
655
Typical for its class
Efficiency (%)
23.14
Typical · median 22.40%
Density (Wp/m²)
231.4
Typical · median 223.7
Temp (%/°C)
-0.300
Typical · median -0.290
Weight (kg)
34.2
Typical · median 34.6 kg
Warranty (yrs)
30
Typical · median 30 yrs

The Sunpro TOPCon 210 BIFACIAL (SPDG 645-660W)-N120M12 series is designed for maximum energy yield from the same surface area - without compromising durability. The use of TOPCon cells ensures stable operation in real-world conditions and better light utilization even with less-than-ideal sunlight, which is important in the Polish climate. A key advantage is the bifacial design, which allows for the recovery of additional energy from reflections off the ground - particularly on roofs with light-colored membranes, carport structures, and ground-mounted systems with sufficient clearance.

Modules in a 210 mm format are a good choice where high power output and faster assembly of larger systems are important. In practice, this series solves the problem of limited space, helping to increase yield without adding additional rows. With double glass, you gain higher resistance to weather conditions and greater safety in commercial and farm installations. This is a proposal for investors seeking predictable production and a long lifespan for their installations.

Ranking

249 panels in the segment TOPCon 650-700 W
Metric This panel Median Position in segment Overall rank
Module efficiency 23.14% 22.40% Typical 1,509
Power density 231.4 223.7 Typical 1,503
Temperature coefficient -0.300 -0.290 Typical 6,093
Weight per kWp 52.2 53.2 Typical 5,680
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 · 0 caution
Best for

Commercial and utility-scale.

Notes from the database
  • 23.1% module efficiency - 0.7pp better than the TOPCon 650-700W median of 22.4%
  • Power density of 231.4 W/m² packs 7.7 W/m² more into the same footprint vs TOPCon 650-700W median (223.7 W/m²)
  • Temperature coefficient of -0.30%/°C matches the TOPCon 650-700W median
  • In the top 11% for efficiency among all TOPCon panels

Specifications

Open datasheet PDF
Nominal power (Pmax) 655 Wp Nameplate at 1000 W/m², 25 °C
Module efficiency 23.14 % Typical Segment median 22.40%
Vmpp · Impp 37.50 V · 17.47 A Operating point at max power
Voc · Isc 44.52 V · 18.51 A Sizes the string length
Max system voltage 1500 V Longer strings than 1000 V modules
Dimensions 2172×1303×35 mm · 2.83 m² of roof
Weight 34.2 kg Typical Typical · median 34.6 kg
Cells 120 · TOPCon Monocrystalline
Bifaciality 1500 % Rear output as a share of front
Coefficient Pmax -0.300 %/°C Typical median -0.290 of its segment
Coefficient Voc · Isc -0.250 · 0.045 %/°C
NOCT 45 °C At 800 W/m², 20 °C ambient
Product warranty 25 years Hardware defects only
Performance warranty 30 years Typical median 30 yrs · median 30 yrs
End-of-warranty output 87.4 % Equals 572 W guaranteed
Degradation 1.00 → 0.40 % First year, then annual

Datasheet charts

Open datasheet PDF

Measured curves published by Sunpro Power in this model's datasheet. A chart carrying a wattage was measured on that variant alone - only the ones that describe 655 Wp appear here. The rest cover the whole series.

Guaranteed Power Output vs. Year (30-Year Linear Performance Warranty) Guaranteed Power Output vs. Year (30-Year Linear Performance Warranty) Whole series P-V Characteristics at Different Irradiance Levels P-V Characteristics at Different Irradiance Levels 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
-0.300 %/°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
Sunpro Power SPDG655-N120M12 655 W 23.14% -0.300 34.2 kg You are here
AIKO-A650-MAE72Mw 650 W 25.20% -0.260 27.0 kg Cooler, lighter, +2.1 pp
AIKO-A680-MDE72Mw 680 W 25.20% -0.260 29.0 kg Cooler, lighter, +2.1 pp
AIKO-A675-MDE72Mw 675 W 25.00% -0.260 29.0 kg Cooler, lighter, +1.9 pp
AIKO-A645-MAE72Mw 645 W 25.00% -0.260 27.0 kg Cooler, lighter, +1.9 pp
AIKO-A700-MAE78Dw 700 W 25.00% -0.260 34.5 kg +45 W, cooler, +1.9 pp
AIKO-A695-MAE78Dw 695 W 24.90% -0.260 34.5 kg +40 W, cooler, +1.8 pp
AIKO-G670-MCH72Mw 670 W 24.80% -0.260 28.2 kg Cooler, lighter, +1.7 pp
SPDG645-N120M12 645 W 22.79% -0.300 34.2 kg -10 W, -0.4 pp
SPDG650-N120M12 650 W 22.97% -0.300 34.2 kg Very close match
SPDG660-N120M12 660 W 23.32% -0.300 34.2 kg Very close match
GKA210N120 680 W 24.03% -0.340 28.0 kg Hotter, lighter, +0.9 pp
GKA210N120-675 675 W 23.85% -0.340 28.0 kg Hotter, lighter, +0.7 pp
QN-670HJT-01 670 W 23.70% -0.240 35.5 kg +15 W, cooler, +0.6 pp
GKA210N120-670 670 W 23.67% -0.340 28.0 kg Hotter, lighter, +0.5 pp
QN-665HJT-01 665 W 23.50% -0.240 35.5 kg Cooler, heavier, +0.4 pp
GKA210N120-665 665 W 23.50% -0.340 28.0 kg Hotter, lighter, +0.4 pp

Found 497 panels of the same or similar size to this one, within ±10 mm. See them here Found 502 panels of the same or similar size to this one, within ±25 mm. See them here Found 502 panels of the same or similar size to this one, within ±50 mm. See them here Found 506 panels of the same or similar size to this one, within ±100 mm. See them here

Common questions

6 answered
Is the Sunpro TOPCon 210 BIFACIAL (SPDG 645-660W)-N120M12 series still available for purchase?
No, this series has been discontinued by Sunpro Power and is no longer in production. Some units may still be available as remaining stock through distributors, but availability is limited. Anyone planning a new installation or expansion using these panels should check current stock with a local distributor or consider the manufacturer's current equivalent models.
How much extra power does bifacial technology actually add on Sunpro N120M12 panels?
The additional rear-side yield of a bifacial module depends on the installation environment. On roofs with a light-colored membrane, white gravel, or ground-mount systems with sufficient clearance, gains of a few up to around ten percent over an equivalent monofacial 660 Wp panel are possible. On dark sloped roofs the effect is minimal, which is why bifacial panels are best suited for solar farms and carports.
How does TOPCon cell technology in Sunpro panels differ from classic PERC cells?
The TOPCon cells used in this series have an additional passivating layer on the rear side of the silicon, which reduces current losses and increases efficiency compared to older PERC cells. In practice this results in higher single-panel power output (up to 660 Wp), better performance under diffuse light, and a smaller efficiency drop at high temperatures, which matters during Polish summers.
What is the warranty on Sunpro TOPCon 210 BIFACIAL N120M12 panels?
Sunpro Power provides a 25-year product warranty and a 30-year power output warranty. This means that even after three decades of operation, the panel should still generate the guaranteed percentage of its initial rated power as specified in the datasheet, which is standard practice for Tier 1 manufacturers.
Are double-glass N120M12 panels suitable for a sloped residential roof?
The double-glass construction performs well on sloped roofs, offering higher resistance to hail, moisture, and mechanical damage than panels with a rear backsheet. However, these modules are heavier than standard backsheet panels, so roof load capacity should be verified beforehand and an appropriate mounting system selected.
Is Sunpro Power a Tier 1 manufacturer, and is it worth buying panels made in China?
Yes, Sunpro Power is classified as Tier 1, indicating stable financials and confirmed production scale, which lowers the risk of future warranty claim issues. The company is headquartered in China, which is standard for most global PV manufacturers, including many brands considered market leaders.
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