Skip to main content
Sunpro Power SPDG475-BC108RL10
Sunpro Power Brand review

SPDG475-BC108RL10

475 Wp Back Contact Bifacial 2500%
ComparePV verdict

Middle of its segment, modest efficiency

Rank 3,424 of 14,005
Compare panels Datasheet PDF
Power (Wp)
475
Typical for its class
Efficiency (%)
23.27
Weak · bottom 23%
Density (Wp/m²)
232.7
Typical · median 235.2
Temp (%/°C)
-0.260
Typical · median -0.260
Weight (kg)
23.5
Typical · median 23.5 kg
Warranty (yrs)
30
Typical · median 30 yrs

The Sunpro BC BIFACIAL MODULES series redefines performance standards through the use of advanced Back Contact cells, which completely eliminate shading on the front side of the module. The use of bifacial technology allows for a significant additional energy yield reflected from the ground, which is crucial in modern ground-mounted installations and on roofs covered with a light membrane. Thanks to the absence of visible busbars on the front, the panels are characterized not only by higher conversion efficiency but also by a unique aesthetic, which clearly sets them apart from standard market solutions. This solution effectively minimizes power losses resulting from high temperatures and LID degradation, ensuring long-term financial stability for the investment. Optimized performance in low-light conditions makes these modules ideal for the Polish climate zone, generating energy efficiently even on cloudy days. The product is primarily aimed at demanding prosumers and business investors for whom maximum power density obtained from a limited mounting area is a priority. What distinguishes this series from the competition is the innovative N-type cell architecture, guaranteeing increased resistance to micro-cracks and a significantly longer lifespan for the entire system. Choosing this series is a guarantee of the highest technical standards, which translates into an accelerated return on investment in photovoltaics.

Ranking

156 panels in the segment Back Contact 450-500 W
Metric This panel Median Position in segment Overall rank
Module efficiency 23.27% 23.50% Weak · bottom 23% 1,202
Power density 232.7 235.2 Typical 1,189
Temperature coefficient -0.260 -0.260 Typical 511
Weight per kWp 49.5 48.0 Typical 3,006
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 · 1 caution
Best for

Residential and commercial.

Not ideal for

Tight roof space.

Watch-outs
23.27% module efficiency

Bottom 23% of the Back Contact 450-500 W segment, against a median of 23.50%.

Notes from the database
  • At 23.3% efficiency, this panel is on par with typical Back Contact 450-500W modules
  • At 232.7 W/m² power density, roof space requirements are typical for Back Contact 450-500W panels
  • At -0.26%/°C, hot weather performance is typical for Back Contact 450-500W panels
  • Ranked #1202 out of 14005 panels for efficiency in the database

Specifications

Open datasheet PDF
Nominal power (Pmax) 475 Wp Nameplate at 1000 W/m², 25 °C
Module efficiency 23.27 % Weak Segment median 23.50%
Vmpp · Impp 33.40 V · 14.23 A Operating point at max power
Voc · Isc 40.42 V · 14.88 A Sizes the string length
Max system voltage 1500 V Longer strings than 1000 V modules
Dimensions 1800×1134×30 mm · 2.04 m² of roof
Weight 23.5 kg Typical Typical · median 23.5 kg
Cells 108 · Back Contact Monocrystalline
Bifaciality 2500 % Rear output as a share of front
Coefficient Pmax -0.260 %/°C Typical median -0.260 of its segment
Coefficient Voc · Isc -0.200 · 0.050 %/°C
NOCT 45 °C At 800 W/m², 20 °C ambient
Product warranty 30 years Hardware defects only
Performance warranty 30 years Typical median 30 yrs · median 30 yrs
End-of-warranty output 88.8 % Equals 422 W guaranteed
Degradation 1.00 → 0.35 % 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 475 Wp appear here. The rest cover the whole series.

Linear performance warranty of 30 years Linear performance warranty of 30 years Whole series PV module: SUNPRO, SPDG475-BC108RL10 (I-V Characteristics at Different Irradiation) PV module: SUNPRO, SPDG475-BC108RL10 (I-V Characteristics at Different Irradiation) 475 W PV module: SUNPRO, SPDG475-BC108RL10 (P-V Characteristics at Different Irradiation) PV module: SUNPRO, SPDG475-BC108RL10 (P-V Characteristics at Different Irradiation) 475 W

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
-0.260 %/°C against a segment median of -0.260
-
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 SPDG475-BC108RL10 475 W 23.27% -0.260 23.5 kg You are here
LR7-54HJD-510M 510 W 25.00% -0.240 23.5 kg +35 W, cooler, +1.7 pp
AIKO-A495-MCE54Mw 495 W 24.80% -0.260 21.0 kg +20 W, lighter, +1.5 pp
LR7-54HJD-505M 505 W 24.70% -0.240 23.5 kg +30 W, cooler, +1.4 pp
AIKO-A490-MCE54Mw 490 W 24.50% -0.260 21.0 kg +15 W, lighter, +1.2 pp
LR7-54HJD-500M 500 W 24.50% -0.240 23.5 kg +25 W, cooler, +1.2 pp
CIPRO-TN9C54M-500W 500 W 24.50% -0.260 21.4 kg +25 W, lighter, +1.2 pp
SPDG470-BC108RL10 470 W 23.03% -0.260 23.5 kg -0.2 pp
SPDG480-BC108RL10 480 W 23.52% -0.260 23.5 kg +0.2 pp
SPDG485-BC108RL10 485 W 23.76% -0.260 23.5 kg +10 W, +0.5 pp

Found 197 panels of the same or similar size to this one, within ±10 mm. See them here Found 201 panels of the same or similar size to this one, within ±25 mm. See them here Found 1712 panels of the same or similar size to this one, within ±50 mm. See them here Found 4014 panels of the same or similar size to this one, within ±100 mm. See them here

Common questions

6 answered
How does Back Contact technology in Sunpro BC panels differ from standard PERC or TOPCon cells?
In Back Contact cells, all electrical connections (busbars) are located on the rear side of the cell, leaving the front surface fully exposed to sunlight. This eliminates shading losses caused by the front metallization grid, resulting in higher conversion efficiency compared to conventional PERC cells and a distinctive, uniform black appearance.
Do Sunpro BC BIFACIAL panels really generate more energy thanks to their bifacial design?
Yes, the additional rear-side energy gain depends on ground albedo, mounting height, and tilt angle. On bright surfaces such as white gravel, roofing membrane, or snow, the extra yield can range from a few to over ten percent annually compared to a monofacial module of the same rated power.
What is the warranty on Sunpro BC BIFACIAL panels and how does it compare to the market?
The series comes with a 30-year product warranty and a 30-year power output warranty, among the longest currently offered in the solar market, where the standard is typically 12-15 years of product warranty and 25-30 years of power warranty. This significantly increases long-term investment security.
Are the 485 Wp modules from the BC BIFACIAL series suitable for ground-mounted installations?
Yes, thanks to their bifacial design and high unit power of 485 Wp, these panels are particularly recommended for ground-mounted systems and solar farms, where the mounting structure allows light reflected from the ground to reach the rear side of the module, maximizing energy yield from fewer panels.
Do Sunpro BC BIFACIAL modules perform well under low light conditions typical in Poland?
Yes, Back Contact technology offers a strong response to low irradiance levels, meaning these panels generate energy more efficiently than standard modules on cloudy days or during early morning and evening hours. This is a significant advantage in Poland's climate, where fully sunny days are limited.
Are panels in this series more resistant to microcracks than cheaper P-type modules?
Yes, the N-type cells used in this series show lower susceptibility to light-induced degradation (LID) and better mechanical resistance compared to conventional P-type cells. The absence of visible front busbars further reduces the risk of microcracks during transport and installation, extending the actual system lifespan.
Add to compare