Middle of its segment, heavy for its output
The Renesola RS7-615~635NBG-E2 series consists of modules designed to achieve high energy production from the same surface area - particularly in locations where maximum power density and stable operation under varying conditions are crucial. The use of N-type TOPCon technology helps to minimize losses due to degradation over time and maintain predictable energy yields throughout the installation's lifespan. The bifacial design, combined with double glass, allows for effective utilization of light reflected from the ground, which translates into additional energy gains in PV farms, ground-mounted installations, and flat-roof systems with a light membrane or gravel.
These modules also stand out for their mechanical and environmental durability, thanks to the robust dual-glass construction, which simplifies the design of installations in demanding locations. This is a sound choice for investors who want to combine high performance with long-term reliability and easier energy cost balancing over time.
Ranking
Signals from the data
Utility-scale and commercial.
Weight-limited structures, tight roof space and roofs where every square metre has to count.
Bottom 11% of the N-type 600-650 W segment, against a median of 52.7.
Bottom 20% of the N-type 600-650 W segment, against a median of 22.77%.
Bottom 22% of the N-type 600-650 W segment, against a median of 227.7.
N-type TOPCon cells deliver a low power temperature coefficient of -0.29%/°C, outperforming typical PERC modules (usually -0.35 to -0.40%/°C), which translates into higher real-world yield in hot climates and on poorly ventilated roofs.
Dual-glass build with bifacial cells captures light reflected off the ground, typically adding several to low double-digit percent energy gain in ground-mount PV farms and on bright flat roofs, while the stiffer structure improves mechanical durability versus standard glass-backsheet modules.
The manufacturer guarantees 87.4% of nominal power retained after 30 years, matching leading N-type series on the market (e.g., Longi Hi-MO X10) and clearly exceeding the 25-year warranty standard of older PERC series.
Renesola is a Tier-1 bankable manufacturer with a 20-year track record (founded 2005), which eases project financing with banks and provides assurance of long-term warranty support availability.
The 2465x1134 mm format with 156 cells reaches up to 635 Wp per module, reducing module count, DC cabling runs, and mounting structure costs per installed MW in large ground-mount installations.
Peak efficiency of 22.72% matches Talesun's TM7G78M but clearly lags behind competing N-type series at the same 635 Wp power class - Sunpro Power TOPCon 210R (23.51%) and Longi Hi-MO X10 (23.5%), a gap of roughly 0.8 percentage points.
Dimensions of 2465x1134x30 mm and a 35 kg weight require at least two installers for handling and a correspondingly reinforced mounting structure, which may increase logistics and labor costs compared to smaller module formats.
- At 22.4% efficiency, this panel is on par with typical N-type 600-650W modules
- 223.6 W/m² power density is 4.1 W/m² below N-type 600-650W median (227.7 W/m²) - requires larger installation area
- At -0.29%/°C, hot weather performance is typical for N-type 600-650W panels
- Weight of 35.0 kg is 2.5 kg above N-type 600-650W median (32.5 kg) - verify structural support
- Ranked #5045 out of 14005 panels for efficiency in the database
Specifications
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.
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