--- title: "Risen RSM156-9-610-635BNDG (620W) Solar Panel: Specs & Datasheet | ComparePV" description: "Risen RSM156-9-610-635BNDG (620W) solar panel. Specs: 22.20% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/risen-energy-rsm156-9-610-635bndg-620w" image: "https://comparepv.com/og/panel/risen-energy-rsm156-9-610-635bndg-620w.png" updated: 2026-09-11 --- # Risen RSM156-9-610-635BNDG (620W) Middle of its segment, needs the roof space 1,085 panels in the segment TOPCon 600-650 W ## Identity - **Manufacturer:** Risen - **Model:** RSM156-9-610-635BNDG (620W) - **Series:** RSM156-9-610-635BNDG - **Rated power:** 620 W - **Cell technology:** TOPCon - **Bifacial:** yes ## How it compares Compared against segment TOPCon 600-650 W (1085 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 620 W | 620 W | Typical | | | Module efficiency | 22.20% | 22.80% | Weak - bottom 12% | 5,881 | | Power density | 221.8 | 227.7 | Weak - bottom 9% | 5,933 | | Temperature coefficient | -0.290 | -0.290 | Typical | 2,220 | | Weight (kg) | 33.5 kg | 32.8 kg | Typical | | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 22.20% | 22.80% | Weak - bottom 12% | 5,881 | | Power density | 221.8 | 227.7 | Weak - bottom 9% | 5,933 | | Temperature coefficient | -0.290 | -0.290 | Typical | 2,220 | | Weight per kWp | 54.0 | 53.1 | Typical | 8,326 | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Watch out for - **221.8 watts per square metre** - Bottom 9% of the TOPCon 600-650 W segment, against a median of 227.7. Ranked 5,933rd in the whole database. - **22.20% module efficiency** - Bottom 12% of the TOPCon 600-650 W segment, against a median of 22.80%. - **Best for:** Commercial, utility-scale and hot-climate. - **Not ideal for:** Roofs where every square metre has to count and tight roof space. ## Specification ### Electrical - **Rated power (Pmax):** 620 W - **Efficiency:** 22.20 % - **Voltage at Pmax (Vmp):** 46.67 V - **Current at Pmax (Imp):** 13.30 A - **Open-circuit voltage (Voc):** 55.82 V - **Short-circuit current (Isc):** 14.16 A - **Max system voltage:** 1500 V ### Temperature - **Temperature coefficient of Pmax:** -0.290 %/degC - **Temperature coefficient of Voc:** -0.250 %/degC - **Temperature coefficient of Isc:** 0.046 %/degC - **NOCT:** 44 degC ### Cell and construction - **Cell type:** Monocrystalline - **Cell technology:** TOPCon - **Cell count:** 156 - **Bifacial:** yes - **Bifacial gain:** 10.00 ### Physical - **Length:** 2465 mm - **Width:** 1134 mm - **Thickness:** 30 mm - **Weight:** 33.5 kg - **Area:** 2.80 m2 - **Power density:** 221.8 Wp/m2 ### Warranty and degradation - **Product warranty:** 15 years - **Performance warranty:** 30 years - **Output guaranteed at end of warranty:** 87.4 % - **Annual degradation:** 0.40 % - **Output after 30 years:** 542 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 5881 of 14129 | | Power density | 5933 of 14129 | | Temperature coefficient | 2220 of 14129 | | Weight | 8326 of 14129 | | Warranty | 21 of 14129 | ## Pros - **N-type TOPCon cells** - TOPCon technology reduces LID-related degradation and performs better under high operating temperatures than older PERC cells, which at 610-635 Wp and up to 22.7% efficiency translates into more predictable annual yield - important for investors focused on LCOE. - **Bifacial dual-glass construction** - The module captures light reflected from the ground, boosting yield in ground-mounted installations, carports, and industrial roofs with light-colored membranes. The glass-glass build also improves environmental resistance and lowers microcrack risk compared to glass-foil designs. - **Tier-1 manufacturer with 38 years of history** - Risen has been in operation since 1986 and holds bankable Tier-1 status, lowering project financing risk and improving confidence in warranty servicing compared to less established brands among the peer comparables. - **30-year linear power warranty** - The power warranty covers 30 years, matching segment leaders such as Longi Hi-MO X10 and exceeding the standard 25-year term common among competitors, which improves project bankability. - **High unit power up to 635 Wp** - For the same mounting footprint the series delivers up to 635 Wp, simplifying string sizing and reducing BoS costs (cabling, racking) in large utility-scale and C&I installations. ## Cons - **Lower efficiency than segment leaders** - A maximum efficiency of 22.7% is noticeably behind comparable 635 Wp modules such as Sunpro Power TOPCon 210R (23.51%) and Longi Hi-MO X10 (23.5%), meaning less energy generation from the same roof or ground area. - **Shorter product warranty than some competitors** - The 15-year product warranty is a standard market term, but segment leaders increasingly extend it to 25 years while keeping the same 30-year power warranty, which may affect the perceived value of Risen's offer in TCO-based tenders. ## About this series The Risen RSM156-9-61etrym-635BNDG series was designed to maximize energy yield from the same surface area - especially where every square meter of space counts. N-type cells in TOPCon technology help limit performance degradation over time, resulting in a more predictable energy output over the long term. This is an excellent choice for investors prioritizing LCOE and real yield, rather than just catalog specifications. The modules are bifacial, enabling them to also utilize reflected light from the ground - benefiting ground-mounted installations, carports, and industrial rooftops with light membranes. The dual glass construction enhances resistance to environmental factors, facilitating operation in demanding locations and minimizing the risk of micro-cracks during operation. Additionally, the high thermal resistance of TOPCon technology contributes to more stable performance in hot conditions. This series is particularly recommended for utility-scale PV farms and the C&I segment, where yield, longevity, and long-term reliability are key. ## Notable figures - Module efficiency of 22.2% is 0.6pp below average for \*\*TOPCon 600-650W\*\* panels (median: 22.8%) - Power density of 221.8 W/m² is 5.9 W/m² below \*\*TOPCon 600-650W\*\* median (227.7 W/m²) - needs more roof space - At -0.29%/°C, hot weather performance is typical for \*\*TOPCon 600-650W\*\* panels - 80% bifaciality enables rear-side power generation, boosting yield by 4-12% on reflective surfaces - Ranked #5881 out of 14129 panels for efficiency in the database ## Questions ### What warranty does the Risen RSM156-9-610-635BNDG series come with? The RSM156-9-610-635BNDG series includes a 15-year product warranty covering materials and workmanship, along with a 30-year linear power output warranty. Risen guarantees at least 95.4% of rated power after 10 years and no less than 87.4% after 30 years. Risen Energy's Tier-1 Bloomberg NEF status adds credibility to these long-term commitments for investors focused on LCOE. ### Are the Risen RSM156-9-610-635BNDG modules suitable for utility-scale or C&I solar installations? Yes, this is one of the primary target applications for this series. With up to 635 Wp per module, the higher wattage reduces total module count and lowers BoS costs. The N-type TOPCon technology combined with a dual-glass structure delivers a lower LCOE over time. The series is particularly well-suited for ground-mounted utility farms, carports, and large flat-roof C&I installations. ### What does bifacial mean for the Risen RSM156-9-610-635BNDG and when does it make financial sense? Bifacial modules harvest energy from both the front side via direct irradiance and from the rear side via albedo reflected off the ground surface. This series achieves a bifaciality factor of approximately 80%, which can translate to 5-15% additional energy yield with high-albedo surfaces such as white roofing membranes, light gravel, or snow. The gain is maximized in ground-mount systems with sufficient module clearance above the ground. ### How do the Risen RSM156-9-610-635BNDG panels perform during high-temperature conditions? TOPCon technology delivers a power temperature coefficient of -0.29%/°C, which is meaningfully better than typical PERC modules at around -0.35%/°C. In practical terms, for every degree Celsius the cell temperature rises above 25°C, power loss is lower than with most PERC alternatives. This advantage compounds on hot, sunny days, making the RSM156-9-610-635BNDG series more productive in warm climates compared to older-generation technology. ### How much does a Risen RSM156-9-610-635BNDG module weigh, and what mechanical loads can it withstand? Each module weighs approximately 33.5 kg with dimensions of 2465×1134×30 mm. The dual-glass construction provides structural resistance to wind loads up to 2,400 Pa and snow loads up to 5,400 Pa under the specified installation method. The added weight compared to glass-foil modules is a direct result of the second glass layer, which in return offers superior moisture ingress protection, UV resistance, and reduced risk of microcracks during long-term operation. ### How does the TOPCon technology in the Risen RSM156-9-610-635BNDG differ from standard PERC modules? TOPCon (Tunnel Oxide Passivated Contact) uses an N-type silicon base with an ultra-thin tunnel oxide and polysilicon passivation layer that significantly reduces carrier recombination. The result is module efficiency of approximately 22-22.7%, versus 20-21% for typical PERC. N-type cells also exhibit lower susceptibility to LID and LeTID degradation, meaning the RSM156-9-610-635BNDG series sustains higher real-world energy output over the full 30-year operational lifespan. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/561777200661f2bf21c951-9134b6b78289.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [AIKO AIKO-A650-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a650-mae72mw) | 650 W | +30 W, lighter, +3.0 pp | | [AIKO AIKO-A645-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a645-mae72mw) | 645 W | Cooler, lighter, +2.8 pp | | [AIKO AIKO-G670-MCH72Mw](https://comparepv.com/panel/aiko-aiko-g670-mch72mw) | 670 W | +50 W, lighter, +2.6 pp | | [Longi Solar LR7-72HVHF-670M](https://comparepv.com/panel/longi-lr7-72hvhf-670m) | 670 W | +50 W, lighter, +2.6 pp | | [AIKO AIKO-A640-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a640-mae72mw) | 640 W | Cooler, lighter, +2.6 pp | | [Jinko Solar JKM650-670N-66QL6-BDV (670W class)](https://comparepv.com/panel/jinko-solar-jkm650-670n-66ql6-bdv-670w-class) | 670 W | +50 W, cooler, +2.6 pp | | [Risen RSM156-9-610-635BNDG (610W)](https://comparepv.com/panel/risen-energy-rsm156-9-610-635bndg-610w) | 610 W | -10 W, -0.4 pp | | [Risen RSM156-9-610-635BNDG (615W)](https://comparepv.com/panel/risen-energy-rsm156-9-610-635bndg-615w) | 615 W | Very close match | | [Risen RSM156-9-610-635BNDG (625W)](https://comparepv.com/panel/risen-energy-rsm156-9-610-635bndg-625w) | 625 W | Very close match | | [Risen RSM156-9-610-635BNDG (630W)](https://comparepv.com/panel/risen-energy-rsm156-9-610-635bndg-630w) | 630 W | +10 W, +0.3 pp | | [AIKO AIKO-A680-MDE72Mw](https://comparepv.com/panel/aiko-aiko-a680-mde72mw) | 680 W | +60 W, lighter, +3.0 pp | | [AIKO AIKO-A675-MDE72Mw](https://comparepv.com/panel/aiko-aiko-a675-mde72mw) | 675 W | +55 W, lighter, +2.8 pp | | [AIKO AIKO-A700-MAE78Dw](https://comparepv.com/panel/aiko-aiko-a700-mae78dw) | 700 W | +80 W, cooler, +2.8 pp | | [WINAICO WST-675BKX72-A2](https://comparepv.com/panel/winaico-wst-675bkx72-a2) | 675 W | +55 W, cooler, +2.8 pp | | [AIKO AIKO-A695-MAE78Dw](https://comparepv.com/panel/aiko-aiko-a695-mae78dw) | 695 W | +75 W, cooler, +2.7 pp | --- Source: https://comparepv.com/panel/risen-energy-rsm156-9-610-635bndg-620w 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.