--- title: "Renesola RS5J-620NBG-E1 620W Solar Panel - Specs & Review | ComparePV" description: "Renesola RS5J-620NBG-E1 620W solar panel. Specs: 22.95% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/renesola-rs5j-620nbg-e1" updated: 2026-09-11 --- # Renesola RS5J-620NBG-E1 Middle of its segment, weak in heat 359 panels in the segment N-type 600-650 W ## Identity - **Manufacturer:** Renesola - **Model:** RS5J-620NBG-E1 - **Series:** RS5J-615~635NBG-E1 - **Rated power:** 620 W - **Cell technology:** N-type - **Bifacial:** yes ## How it compares Compared against segment N-type 600-650 W (359 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 620 W | 625 W | Typical | | | Module efficiency | 22.95% | 22.77% | Typical | 2,268 | | Power density | 229.5 | 227.7 | Typical | 2,191 | | Temperature coefficient | -0.300 | -0.290 | Weak - bottom 11% | 6,093 | | Weight (kg) | 32.4 kg | 32.5 kg | Typical | | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 22.95% | 22.77% | Typical | 2,268 | | Power density | 229.5 | 227.7 | Typical | 2,191 | | Temperature coefficient | -0.300 | -0.290 | Weak - bottom 11% | 6,093 | | Weight per kWp | 52.3 | 52.7 | Typical | 5,719 | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Watch out for - **-0.300 %/°C temperature coefficient** - Bottom 11% of the N-type 600-650 W segment, against a median of -0.290. - **Best for:** Commercial, utility-scale, shaded-installations and hot-climate. - **Not ideal for:** Hot climates. ## Specification ### Electrical - **Rated power (Pmax):** 620 W - **Efficiency:** 22.95 % - **Voltage at Pmax (Vmp):** 40.74 V - **Current at Pmax (Imp):** 15.22 A - **Open-circuit voltage (Voc):** 49.08 V - **Short-circuit current (Isc):** 16.08 A - **Max system voltage:** 1500 V ### Temperature - **Temperature coefficient of Pmax:** -0.300 %/degC - **Temperature coefficient of Voc:** -0.240 %/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:** 2382 mm - **Width:** 1134 mm - **Thickness:** 30 mm - **Weight:** 32.4 kg - **Area:** 2.70 m2 - **Power density:** 229.5 Wp/m2 ### Warranty and degradation - **Product warranty:** 15 years - **Performance warranty:** 30 years - **Output guaranteed at end of warranty:** 87.4 % - **First-year degradation:** 1.00 % - **Annual degradation:** 0.40 % - **Output after 30 years:** 542 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 2268 of 14005 | | Power density | 2191 of 14005 | | Temperature coefficient | 6093 of 14005 | | Weight | 5719 of 14005 | | Warranty | 21 of 14005 | ## Pros - **N-type TOPCon cells with MBB half-cut** - N-type TOPCon technology combined with non-destructive half-cut cutting and a multi-busbar (MBB) grid reduces resistive losses and LID degradation, translating into higher annual yield and better performance under partial shading than older PERC modules. - **Bifacial dual-glass construction** - Dual glass encapsulation with two-sided cell generation captures light reflected off the ground surface, meaningfully increasing energy output in ground-mounted arrays, high-albedo rooftops, and elevated racking compared to standard monofacial panels. - **Up to 23.51% efficiency, matching segment leaders** - The top-end efficiency (23.51%) matches the best peer comparables - Sunpro Power TOPCon 210R BIFACIAL (23.51%) and Longi Hi-MO X10 (23.5%) - and clearly outperforms Talesun TM7G78M BIPRO (22.72%) at the same 635 Wp max power point. - **30-year power warranty at 87.4% retention** - The manufacturer guarantees at least 87.4% of nominal power output after 30 years of operation, a premium N-type standard that lowers long-term investment risk over the module's lifetime. - **Established manufacturer operating since 2005** - ReneSola is a PV manufacturer with over 20 years in the market, historically listed on the BNEF Tier 1 ranking for 11 consecutive years, reflecting a mature production line and experience scaling bifacial modules. ## Cons - **Lost BNEF Tier 1 status in Q3 2026** - While ReneSola appeared on the BNEF Tier 1 list through Q1-Q2 2026 (5,000 MW annual capacity), it was absent from the updated Q3 2026 ranking, which typically signals a failure to meet BNEF's financial or documentary criteria. This could complicate project financing for banks requiring uninterrupted Tier 1 manufacturer status. - **Higher weight due to dual-glass build** - The dual-glass construction (30 mm module thickness) is heavier than typical single-glass, polymer-framed modules, increasing structural load requirements on mounting systems and potentially raising installation costs on lightweight roofs. ## About this series The Renesola RS5J-615~635NBG-E1 series are dual-sided modules with double glass, based on N-type cells in TOPCon technology - designed to maximize yield in modern commercial and utility-scale installations. The use of a **dual-glass bifacial design** allows for better utilization of reflected light from the ground, which significantly improves energy production in ground-mounted, bright roof, and elevated structures. These modules are distinguished by a **MBB half-cut technology**, which allows for non-destructive cutting, reducing resistive losses and improving performance under partial shading. Their **stable performance at high temperatures** makes them easier to maintain in summer and on roofs with poor ventilation. Another advantage is their **long-term reliability**, resulting from rigorous material selection and a robust, mechanically resistant design. This makes them a good choice for investors who want to extract more kWh from the same area and minimize degradation over many years of operation. ## Notable figures - Efficiency of 22.9% matches the \*\*N-type 600-650W\*\* median - At 229.5 W/m² power density, roof space requirements are typical for \*\*N-type 600-650W\*\* panels - At -0.30%/°C, hot weather performance is typical for \*\*N-type 600-650W\*\* panels - In the top 16% for efficiency among all N-type panels ## Questions ### What is the maximum power output of the Renesola RS5J-615~635NBG-E1 and what module efficiency does it reach? The top variant in the series delivers 635 Wp peak power at a module efficiency of up to 23.51%. This result is achieved through N-type TOPCon cell technology combined with MBB half-cut cell architecture. In practice, it means more kilowatt-hours from the same roof or ground area compared to conventional PERC modules of similar dimensions. ### What does bifacial dual-glass mean in the RS5J-615~635NBG-E1 series and is it worth the extra cost? Bifacial dual-glass refers to double-sided cells encapsulated between two glass panes instead of a rear backsheet. The rear glass allows reflected light from the ground or a light-colored roof surface to generate an additional 5–15% of energy without increasing the array footprint. The dual-glass construction is also more durable and resistant to moisture and UV degradation. For ground-mounted systems and solar farms with reflective surfaces, this is a measurable financial benefit, not just a marketing claim. ### What warranty does the Renesola RS5J-615~635NBG-E1 come with? Renesola provides a 15-year product warranty covering material and workmanship defects, along with a 30-year linear power warranty guaranteeing at least 87.4% of rated power output at end of term. These are standard Tier 1 manufacturer terms and provide strong bankability for long-term project financing. ### How does the RS5J-615~635NBG-E1 series perform in high summer temperatures? The temperature coefficient of Pmax is -0.30%/°C, one of the best figures available for commercial crystalline modules, thanks to N-type TOPCon cell properties. Older PERC modules typically reach -0.35%/°C or worse. On a hot summer day when module surface temperature hits 70°C, the RS5J series loses noticeably less power than older-generation competitors, directly improving LCOE over the full service life. ### Are the Renesola RS5J-615~635NBG-E1 panels suitable for large-scale solar farms? Yes, the RS5J-615~635NBG-E1 series is designed primarily for commercial and utility-scale installations. High unit power (up to 635 Wp), bifacial construction that captures albedo light, and the 182–210 mm cell format are well matched to tracker-mounted or fixed elevated structures. Fewer modules required to reach target capacity directly reduces balance-of-system (BoS) costs. ### How does the TOPCon N-type technology in the RS5J-615~635NBG-E1 compare to older PERC panels? TOPCon (Tunnel Oxide Passivated Contact) uses an N-type silicon base with an additional passivation layer that reduces carrier recombination at the cell surface. The result is higher efficiency, a lower temperature coefficient, and significantly reduced LID (Light Induced Degradation) in the first years of operation. PERC cells rely on a P-type substrate, cost less to manufacture, but degrade more in early years and under heat. The RS5J-615~635NBG-E1 therefore delivers better energy yield across its entire 30-year warranty period. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/rs5j-615-635nbg-n-type-182-210-bifacial-module-with-dual-gla-0e5b001e515c.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [AIKO AIKO-A650-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a650-mae72mw) | 650 W | Cooler, lighter, +2.2 pp | | [AIKO AIKO-A645-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a645-mae72mw) | 645 W | Cooler, lighter, +2.1 pp | | [AIKO AIKO-G670-MCH72Mw](https://comparepv.com/panel/aiko-aiko-g670-mch72mw) | 670 W | +50 W, lighter, +1.9 pp | | [Longi Solar LR7-72HVHF-670M](https://comparepv.com/panel/longi-lr7-72hvhf-670m) | 670 W | +50 W, cooler, +1.9 pp | | [AIKO AIKO-A640-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a640-mae72mw) | 640 W | Cooler, lighter, +1.9 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, +1.9 pp | | [Renesola RS5J-615NBG-E1](https://comparepv.com/panel/renesola-rs5j-615nbg-e1) | 615 W | Very close match | | [Renesola RS5J-625NBG-E1](https://comparepv.com/panel/renesola-rs5j-625nbg-e1) | 625 W | Very close match | | [Renesola RS5J-630NBG-E1](https://comparepv.com/panel/renesola-rs5j-630nbg-e1) | 630 W | +10 W, +0.4 pp | | [Renesola RS5J-635NBG-E1](https://comparepv.com/panel/renesola-rs5j-635nbg-e1) | 635 W | +15 W, +0.6 pp | | [AIKO AIKO-A680-MDE72Mw](https://comparepv.com/panel/aiko-aiko-a680-mde72mw) | 680 W | +60 W, cooler, +2.2 pp | | [AIKO AIKO-A675-MDE72Mw](https://comparepv.com/panel/aiko-aiko-a675-mde72mw) | 675 W | +55 W, cooler, +2.1 pp | | [AIKO AIKO-A700-MAE78Dw](https://comparepv.com/panel/aiko-aiko-a700-mae78dw) | 700 W | +80 W, cooler, +2.1 pp | | [AIKO AIKO-A695-MAE78Dw](https://comparepv.com/panel/aiko-aiko-a695-mae78dw) | 695 W | +75 W, cooler, +1.9 pp | --- Source: https://comparepv.com/panel/renesola-rs5j-620nbg-e1 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.