Middle of its segment, weak in heat
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.
Ranking
Signals from the data
Commercial, utility-scale, shaded-installations and hot-climate.
Hot climates.
Bottom 11% of the N-type 600-650 W segment, against a median of -0.290.
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.
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.
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.
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.
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.
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.
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.
- 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
Specifications
Datasheet charts
Measured curves published by Renesola in this model's datasheet. A chart carrying a wattage was measured on that variant alone - only the ones that describe 620 Wp appear here. The rest cover the whole series.
Simulations
Degradation from this panel's own datasheet figures. No inverter, soiling or shading losses.
Model: bifaciality × albedo × 0.6 view factor. A first-order estimate, not a yield simulation.
Found 1119 panels of the same or similar size to this one, within ±10 mm. See them here Found 1125 panels of the same or similar size to this one, within ±25 mm. See them here Found 1236 panels of the same or similar size to this one, within ±50 mm. See them here Found 1917 panels of the same or similar size to this one, within ±100 mm. See them here