Strong in heat, heavy for its output
The JS-PERC series from JS Solar features advanced modules based on monocrystalline cell technology with an additional passivation layer, which directly translates into higher efficiency in low-light conditions. The Half-Cut cell technology used in them effectively reduces energy losses resulting from internal resistance and partial shading of the module, which is crucial on roofs with complex geometry. These panels solve the problem of limited installation space, delivering more power from every square meter thanks to high energy conversion efficiency. The design based on Multi-Busbar connections shortens the path of electron flow, minimizing the risk of micro-cracks and increasing resistance to extreme weather events. The series stands out from the competition with excellent resistance to PID-induced degradation and a low temperature coefficient, which guarantees stable system operation even during summer heatwaves. It is an ideal solution for prosumers and companies looking for solid components that combine modern technical innovations with long-term reliability, ensuring a fast return on investment in the Polish climate. Thanks to precise workmanship, these modules form the foundation of an efficient and safe photovoltaic micro-installation.
Ranking
Signals from the data
Residential, commercial, shaded-installations and hot-climate.
Weight-limited structures, tight roof space and roofs where every square metre has to count.
Top 24% of the PERC 400-450 W segment, against a median of -0.350.
Bottom 8% of the PERC 400-450 W segment, against a median of 53.0. Ranked 12,639th in the whole database.
Bottom 10% of the PERC 400-450 W segment, against a median of 20.60%.
Bottom 11% of the PERC 400-450 W segment, against a median of 206.2.
The series covers 16 models from 360 to 555 Wp, enabling precise system sizing for residential rooftops (≤360 Wp) through mid-scale commercial arrays (up to 555 Wp) without mixing series.
Peak efficiency of 21.7% matches peer comparable Jinko Solar in the PERC segment and outperforms both Boviet Solar Vega (21.3%) and Shinson S-Max™ (21.48%), placing the series at the forefront of its cell technology class.
Combining half-cut cells with Multi-Busbar (MBB) interconnection shortens current paths, reducing series resistance and partial-shading losses by up to 30% vs. conventional full-cell modules — particularly relevant for rooftops with chimneys or dormers.
Modules feature PID-resistant passivation, essential for transformerless (TL) inverter systems operating at 1000 V DC, eliminating the risk of power loss caused by sodium ion migration through the laminate glass.
The manufacturer guarantees a 25-year linear power output warranty in line with the industry standard, confirming long-term reliability under Polish climate conditions with temperature swings from -30°C to +40°C.
P-type PERC technology suffers first-year LID of 2–3% and annual degradation of ~0.45–0.55%, whereas N-type TOPCon modules (the dominant 2025–2026 market standard) exhibit LID below 0.5% and ~0.25–0.40%/yr degradation, resulting in approximately 8–12% higher cumulative energy yield over a 25-year system lifetime.
JS Solar does not appear on the BNEF Tier-1 list (Q1 2026), meaning it does not meet bankability criteria required for non-recourse project finance. Peer comparable Jinko Solar holds confirmed Tier-1 status — a material distinction for larger installations seeking third-party financing or leasing.
The materials and workmanship (product) warranty is only 15 years, compared to the 25-year product warranty offered as standard by Jinko Solar and JA Solar at comparable wattage and technology, increasing the risk of out-of-pocket replacement costs mid-installation lifecycle.
All 16 variants are strictly monofacial — the series offers no bifacial model. Bifacial PERC modules in the same wattage class (e.g., JA Solar JAM72D30) deliver 5–20% additional annual yield depending on ground albedo, a meaningful production delta in Poland where snow cover and light-colored roofing enhance bifacial gain.
- At 19.9% efficiency, this panel is 0.7pp below the PERC 400-450W median of 20.6%
- 199.2 W/m² power density is 7.0 W/m² below PERC 400-450W median (206.2 W/m²) - requires larger installation area
- Temperature coefficient of -0.34%/°C matches the PERC 400-450W median
- At 27.0 kg (5.0 kg above PERC 400-450W median of 22.0 kg), requires checking roof load capacity
- Ranked #12331 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.
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