--- title: "Sunpro Power SPDG485-BC108RL10 485W Solar Panel - Specs & Review | ComparePV" description: "Sunpro Power SPDG485-BC108RL10 485W solar panel. Specs: 23.76% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/sunpro-spdg485-bc108rl10" updated: 2026-09-11 --- # Sunpro Power SPDG485-BC108RL10 Solid all-round for its segment 156 panels in the segment Back Contact 450-500 W ## Identity - **Manufacturer:** Sunpro Power - **Model:** SPDG485-BC108RL10 - **Series:** BC BIFACIAL MODULES - **Rated power:** 485 W - **Cell technology:** Back Contact - **Bifacial:** yes ## How it compares Compared against segment Back Contact 450-500 W (156 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 485 W | 475 W | Strong - top 21% | | | Module efficiency | 23.76% | 23.50% | Typical | 511 | | Power density | 237.6 | 235.2 | Typical | 495 | | Temperature coefficient | -0.260 | -0.260 | Typical | 511 | | Weight (kg) | 23.5 kg | 23.5 kg | Typical | | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 23.76% | 23.50% | Typical | 511 | | Power density | 237.6 | 235.2 | Typical | 495 | | Temperature coefficient | -0.260 | -0.260 | Typical | 511 | | Weight per kWp | 48.5 | 48.0 | Typical | 2,282 | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | - **Best for:** Residential and commercial. ## Specification ### Electrical - **Rated power (Pmax):** 485 W - **Efficiency:** 23.76 % - **Voltage at Pmax (Vmp):** 33.62 V - **Current at Pmax (Imp):** 14.43 A - **Open-circuit voltage (Voc):** 40.64 V - **Short-circuit current (Isc):** 15.08 A - **Max system voltage:** 1500 V ### Temperature - **Temperature coefficient of Pmax:** -0.260 %/degC - **Temperature coefficient of Voc:** -0.200 %/degC - **Temperature coefficient of Isc:** 0.050 %/degC - **NOCT:** 45 degC ### Cell and construction - **Cell type:** Monocrystalline - **Cell technology:** Back Contact - **Cell count:** 108 - **Bifacial:** yes - **Bifacial gain:** 25.00 ### Physical - **Length:** 1800 mm - **Width:** 1134 mm - **Thickness:** 30 mm - **Weight:** 23.5 kg - **Area:** 2.04 m2 - **Power density:** 237.6 Wp/m2 ### Warranty and degradation - **Product warranty:** 30 years - **Performance warranty:** 30 years - **Output guaranteed at end of warranty:** 88.8 % - **First-year degradation:** 1.00 % - **Annual degradation:** 0.35 % - **Output after 30 years:** 431 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 511 of 14005 | | Power density | 495 of 14005 | | Temperature coefficient | 511 of 14005 | | Weight | 2282 of 14005 | | Warranty | 21 of 14005 | ## About this series 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. ## Notable figures - At 23.8% efficiency, this panel is on par with typical \*\*Back Contact 450-500W\*\* modules - At 237.6 W/m² power density, roof space requirements are typical for \*\*Back Contact 450-500W\*\* panels - Temperature coefficient of -0.26%/°C matches the \*\*Back Contact 450-500W\*\* median - Ranked #511 out of 14005 panels for efficiency in the database ## Questions ### 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. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/bc-spdgxxx-bc108rl10-470-485w-full-black-30mm-4-6aa454c42d85.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [Longi Solar LR7-54HJD-510M](https://comparepv.com/panel/longi-lr7-54hjd-510m) | 510 W | +25 W, cooler, +1.2 pp | | [AIKO AIKO-A495-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a495-mce54mw) | 495 W | +10 W, lighter, +1.0 pp | | [Longi Solar LR7-54HJD-505M](https://comparepv.com/panel/longi-lr7-54hjd-505m) | 505 W | +20 W, cooler, +0.9 pp | | [AIKO AIKO-A490-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a490-mce54mw) | 490 W | Lighter, +0.7 pp | | [Longi Solar LR7-54HJD-500M](https://comparepv.com/panel/longi-lr7-54hjd-500m) | 500 W | +15 W, cooler, +0.7 pp | | [Talesun CIPRO-TN9C54M-500W](https://comparepv.com/panel/talesun-cipro-tn9c54m-500w) | 500 W | +15 W, lighter, +0.7 pp | | [Sunpro Power SPDG470-BC108RL10](https://comparepv.com/panel/sunpro-spdg470-bc108rl10) | 470 W | -15 W, -0.7 pp | | [Sunpro Power SPDG475-BC108RL10](https://comparepv.com/panel/sunpro-spdg475-bc108rl10) | 475 W | -10 W, -0.5 pp | | [Sunpro Power SPDG480-BC108RL10](https://comparepv.com/panel/sunpro-spdg480-bc108rl10) | 480 W | -0.2 pp | --- Source: https://comparepv.com/panel/sunpro-spdg485-bc108rl10 Not in this file, on the page: the I-V and temperature curves lifted from the manufacturer's datasheet, a thirty-year output simulator, a bifacial gain calculator and alternatives filtered by how closely they match these dimensions.