--- title: "Renesola RS9-650MBG-E1 650W Solar Panel - Specs & Review | ComparePV" description: "Renesola RS9-650MBG-E1 650W solar panel. Specs: 20.92% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/renesola-rs9-650mbg-e1" updated: 2026-09-11 --- # Renesola RS9-650MBG-E1 Middle of its segment, modest efficiency 109 panels in the segment N-type 650-700 W ## Identity - **Manufacturer:** Renesola - **Model:** RS9-650MBG-E1 - **Series:** RS9-650~670MBG-E1 - **Rated power:** 650 W - **Cell technology:** N-type - **Bifacial:** yes ## How it compares Compared against segment N-type 650-700 W (109 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 650 W | 660 W | Weak - bottom 12% | | | Module efficiency | 20.92% | 23.30% | Weak - bottom 1% | 10,014 | | Power density | 209.2 | 233.2 | Weak - bottom 1% | 10,011 | | Temperature coefficient | -0.340 | -0.290 | Weak - bottom 10% | 8,778 | | Weight (kg) | 37.5 kg | 33.5 kg | Weak - bottom 1% | | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 20.92% | 23.30% | Weak - bottom 1% | 10,014 | | Power density | 209.2 | 233.2 | Weak - bottom 1% | 10,011 | | Temperature coefficient | -0.340 | -0.290 | Weak - bottom 10% | 8,778 | | Weight per kWp | 57.7 | 50.9 | Weak - bottom 1% | 11,364 | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Watch out for - **20.92% module efficiency** - Bottom 1% of the N-type 650-700 W segment, against a median of 23.30%. Ranked 10,014th in the whole database. - **209.2 watts per square metre** - Bottom 1% of the N-type 650-700 W segment, against a median of 233.2. Ranked 10,011th in the whole database. - **57.7 kg per kWp** - Bottom 1% of the N-type 650-700 W segment, against a median of 50.9. Ranked 11,364th in the whole database. - **Best for:** Utility-scale, commercial and shaded-installations. - **Not ideal for:** Tight roof space, roofs where every square metre has to count and weight-limited structures. ## Specification ### Electrical - **Rated power (Pmax):** 650 W - **Efficiency:** 20.92 % - **Voltage at Pmax (Vmp):** 37.70 V - **Current at Pmax (Imp):** 17.27 A - **Open-circuit voltage (Voc):** 45.50 V - **Short-circuit current (Isc):** 18.35 A - **Max system voltage:** 1500 V ### Temperature - **Temperature coefficient of Pmax:** -0.340 %/degC - **Temperature coefficient of Voc:** -0.250 %/degC - **Temperature coefficient of Isc:** 0.040 %/degC - **NOCT:** 43 degC ### Cell and construction - **Cell type:** Monocrystalline - **Cell technology:** N-type - **Cell count:** 132 - **Bifacial:** yes - **Bifacial gain:** 10.00 ### Physical - **Length:** 2384 mm - **Width:** 1303 mm - **Thickness:** 33 mm - **Weight:** 37.5 kg - **Area:** 3.11 m2 - **Power density:** 209.2 Wp/m2 ### Warranty and degradation - **Product warranty:** 12 years - **Performance warranty:** 30 years - **Output guaranteed at end of warranty:** 85.0 % - **First-year degradation:** 2.00 % - **Annual degradation:** 0.45 % - **Output after 30 years:** 552 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 10014 of 14005 | | Power density | 10011 of 14005 | | Temperature coefficient | 8778 of 14005 | | Weight | 11364 of 14005 | | Warranty | 21 of 14005 | ## Pros - **N-type TOPCon cells with dual-glass construction** - N-type TOPCon cells in a glass-glass build reduce LID/LeTID degradation and improve resistance to moisture and microcracks compared to older PERC modules with aluminum frames and backsheet foil. - **High efficiency matching segment leaders** - Efficiency up to 21.57% is identical to Techwise Solar Summit Series and Resun Solar RS9H-M (both 21.57%) and close to Hiwatt Solar HW-M12/132H (21.6%), placing the series on par with the best comparable products on the market. - **30-year linear power warranty** - The power warranty covers 30 years with a guaranteed minimum of 85% output at end of term, longer than the standard 25-year warranty offered by most tier-1 manufacturers, which eases LCOE modeling for long-term projects. - **Bifacial design boosts yield without extra footprint** - The dual-glass bifacial construction captures reflected light from the ground (e.g., light-colored soil, gravel, or snow), potentially adding several to double-digit percentage points of extra energy yield in ground-mount and utility-scale PV farms without increasing module footprint. - **Half-cut cells and MBB technology** - Half-cut cells combined with multi-busbar (MBB) design reduce resistive losses and improve module performance under partial shading and lower irradiance, resulting in a more stable production profile throughout the day. ## Cons - **Production discontinued – limited availability** - The RS9-650~670MBG-E1 series was manufactured from 2021 to 2024 and is now discontinued. This means limited access to remaining inventory, and potential future difficulties with warranty service and matching replacement modules in case of individual panel failure within an installation. - **Lost BNEF Tier 1 status in Q3 2026** - Renesola was still listed on the BNEF Tier 1 list as of Q1/Q2 2026, but was removed in the Q3 2026 update due to outstanding financial obligations flagged by BloombergNEF. This materially affects project bankability for financing requiring the manufacturer to hold current Tier 1 status at the time of financing agreement. ## About this series The Renesola RS9-650~670MBG-E1 series are **dual-sided, dual-glass modules** designed for high energy production in projects where every square meter and long-term stability are crucial. The glass-glass construction improves resistance to environmental factors and reduces the risk of microcracks, which translates into predictable yields over time. The use of **mono-PERC solar cells** and technologies such as **half-cut cells and MBB technology** supports higher efficiency in real conditions, even with weaker sunlight and less ideal light angles. This is a good choice for PV farms and larger commercial installations, where the dual-sided module can effectively utilize reflections from the ground, increasing production without expanding the surface area. The series also features **a long power warranty** and a positive power tolerance, which simplifies design and reduces the risk of "under-delivery" of parameters in a finished installation. ## Notable figures - At 20.9% efficiency, this panel is 2.4pp below the \*\*N-type 650-700W\*\* median of 23.3% - 209.2 W/m² power density is 23.9 W/m² below \*\*N-type 650-700W\*\* median (233.2 W/m²) - requires larger installation area - Temperature coefficient of -0.34%/°C is 0.05pp worse than \*\*N-type 650-700W\*\* median (-0.29%/°C) - higher losses in summer heat - Weight of 37.5 kg is 4.0 kg above \*\*N-type 650-700W\*\* median (33.5 kg) - verify structural support - Ranked #10014 out of 14005 panels for efficiency in the database ## Questions ### Is the Renesola RS9-650~670MBG-E1 series still available for purchase? The RS9-650~670MBG-E1 series has been discontinued by Renesola and is no longer available as a new factory order. Some distributors may still hold stock, so it is worth checking current inventory levels and confirming that warranty documentation can be provided before committing to a purchase. For new projects, Renesola's current lineup offers newer series with higher per-module power output. ### What warranty does the Renesola RS9-650~670MBG-E1 come with? Renesola backs the RS9-650~670MBG-E1 with a 12-year product warranty covering manufacturing defects and material faults, plus a 30-year linear power warranty guaranteeing at least 85% of rated power at end of life. Annual power degradation is capped at 0.45%. Both warranties are contingent on installation in accordance with the manufacturer's guidelines and require valid purchase documentation. ### How much additional energy production can I expect from the bifacial design of the RS9-650~670MBG-E1? The bifacial design captures sunlight reflected off the ground or surrounding surfaces through the rear glass, typically delivering 5–15% more energy than a comparable monofacial module. Actual bifacial gain depends heavily on ground albedo and mounting height above the surface. Ground-mounted utility systems with light-colored or sandy soil see the greatest benefit, while rooftop applications with low albedo gain significantly less. ### What are the advantages of dual-glass construction in the RS9-650~670MBG-E1 compared to standard backsheet modules? The glass-glass (dual glass) construction offers superior resistance to moisture ingress, ammonia, and corrosion compared to polymer backsheet modules. It also reduces the risk of microcracks and potential-induced degradation (PID). The trade-off is a higher weight of 38.7 kg versus approximately 28–30 kg for a backsheet module of similar power, which must be accounted for in racking design and installation planning. ### How do the RS9-650~670MBG-E1 modules perform in low-light conditions and cold temperatures? The temperature coefficient of Pmax is -0.35%/°C, meaning output can briefly exceed rated power during cold weather — an advantage in climates with cold but sunny mornings. MBB half-cut cell technology combined with gallium-doped wafers improves the module's weak-light response, resulting in better energy harvest during early morning, evening hours, and overcast conditions typical of northern European climates. ### Are the Renesola RS9-650~670MBG-E1 670 Wp modules suitable for residential rooftop installations? This series is designed primarily for utility-scale and large commercial PV plants. At 38.7 kg and 2384×1303×35 mm, the modules are difficult to maneuver on sloped residential rooftops and may exceed the load limits of standard residential rafter structures. For residential prosumer installations, lighter 400–450 Wp modules designed for the residential segment are a more practical choice. The RS9 MBG-E1 is best suited to flat commercial roofs with reinforced load-bearing capacity. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/rs9-650-670mbg-210-132-bifacial-module-with-dual-glass-c1ce489d859c.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [AIKO AIKO-A650-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a650-mae72mw) | 650 W | Cooler, lighter, +4.3 pp | | [AIKO AIKO-A680-MDE72Mw](https://comparepv.com/panel/aiko-aiko-a680-mde72mw) | 680 W | Cooler, lighter, +4.3 pp | | [AIKO AIKO-A675-MDE72Mw](https://comparepv.com/panel/aiko-aiko-a675-mde72mw) | 675 W | Cooler, lighter, +4.1 pp | | [AIKO AIKO-A645-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a645-mae72mw) | 645 W | Cooler, lighter, +4.1 pp | | [AIKO AIKO-A700-MAE78Dw](https://comparepv.com/panel/aiko-aiko-a700-mae78dw) | 700 W | +50 W, cooler, +4.1 pp | | [AIKO AIKO-A695-MAE78Dw](https://comparepv.com/panel/aiko-aiko-a695-mae78dw) | 695 W | +45 W, cooler, +4.0 pp | | [AIKO AIKO-G670-MCH72Mw](https://comparepv.com/panel/aiko-aiko-g670-mch72mw) | 670 W | Cooler, lighter, +3.9 pp | | [Renesola RS9-655M-E1](https://comparepv.com/panel/renesola-rs9-655m-e1) | 655 W | Lighter, -5 yr warranty | | [Renesola RS9-660M-E1](https://comparepv.com/panel/renesola-rs9-660m-e1) | 660 W | Lighter, +0.3 pp, -5 yr warranty | | [Renesola RS9-665M-E1](https://comparepv.com/panel/renesola-rs9-665m-e1) | 665 W | Lighter, +0.5 pp, -5 yr warranty | | [Renesola RS9-670M-E1](https://comparepv.com/panel/renesola-rs9-670m-e1) | 670 W | Lighter, +0.6 pp, -5 yr warranty | | [AIKO AIKO-A805-GRH78Dw](https://comparepv.com/panel/aiko-aiko-a805-grh78dw) | 805 W | +155 W, cooler, +4.2 pp | | [AIKO AIKO-A800-GRH78Dw](https://comparepv.com/panel/aiko-aiko-a800-grh78dw) | 800 W | +150 W, cooler, +4.0 pp | | [AIKO AIKO-A795-GRH78Dw](https://comparepv.com/panel/aiko-aiko-a795-grh78dw) | 795 W | +145 W, cooler, +3.9 pp | | [AIKO AIKO-A790-GRH78Dw](https://comparepv.com/panel/aiko-aiko-a790-grh78dw) | 790 W | +140 W, cooler, +3.7 pp | | [Trina Solar TSM-NEG21C.20Q-760](https://comparepv.com/panel/trina-solar-tsm-neg21c-20q-760) | 760 W | +110 W, cooler, +3.6 pp | --- Source: https://comparepv.com/panel/renesola-rs9-650mbg-e1 Not in this file, on the page: a thirty-year output simulator, a bifacial gain calculator and alternatives filtered by how closely they match these dimensions.