Middle of its segment, short guarantee
The JS Solar JS210MC120 series consists of advanced photovoltaic modules based on large-format 210 mm silicon cells, which set a new standard for efficiency in commercial and industrial installations. Thanks to the use of half-cut cell technology, these panels effectively minimize energy losses resulting from internal resistance, which directly translates to stable power production even in challenging lighting conditions or partial shading. The design utilizing multi-busbar connections ensures optimal electron flow and significantly increases the module's resistance to micro-cracks, guaranteeing system longevity in the variable Polish climate. This solution meets the needs of investors seeking maximum power density on limited roof space, allowing for a real reduction in the costs of mounting structures and cabling. Compared to the competition, the JS210MC120 stands out with its high resistance to potential-induced degradation (PID) and a low temperature coefficient, making it an ideal choice for large solar farms and modern business buildings. The innovative non-destructive cell cutting method eliminates the risk of mechanical damage, ensuring failure-free operation and a quick return on investment for the most demanding users in the renewable energy sector.
Ranking
Signals from the data
Commercial and shaded-installations.
Owners who want a long output guarantee and hot climates.
Bottom 19% of the 300-500 W band, against a median of 30 yrs.
Bottom 23% of the 300-500 W band, against a median of -0.300.
120 half-cut cells (60 full M10 210 mm wafers) reduce resistive losses by ~50% vs. full-cell modules, improving partial-shade tolerance. Multi-busbar (MBB) interconnection shortens electron paths, cuts optical losses, and limits micro-crack propagation over the module's lifespan.
The 405 Wp top variant achieves 21.1% module efficiency at ~1.92 m², clearly outperforming direct peers: EGing PV STAR Series (20.74%) and VSUN VSUN405-108BMH-DG (20.74%). Higher power density per m² is advantageous on constrained roof surfaces.
The module carries a PID-free rating, a critical specification for high-voltage string installations (Voc >1000 V) typical of commercial rooftop and utility-scale systems where induced voltage degradation poses the greatest risk.
A temperature coefficient of approximately –0.35%/°C, typical for half-cut PERC, limits summer production losses and helps stabilize annual energy yield under the variable irradiance conditions of Central European climates.
JS Solar provides a 25-year linear power output warranty, matching the commercial-segment market standard and forming the basis for bankable long-term ROI and LCOE modeling in project finance documents.
The JS210MC120 is marked discontinued (launched 2021). New module availability is severely limited, and warranty service plus spare parts (junction boxes, seals, bypass diodes) may be difficult to source within a 10–25 year operational horizon.
JS Solar does not appear on the BNEF Tier 1 bankable manufacturers list (verified against Q2 and Q4 2025 lists). For commercially financed projects, this can block project financing or increase insurance premiums, and it raises long-term counterparty risk on warranty claims.
Two of three peer comparables offer bifacial modules: Goldi Solar GS10-M108-BF and VSUN VSUN405-108BMH-DG (dual glass). Bifacial modules typically generate 5–15% additional yield from ground albedo, translating to a materially better LCOE on ground-mount installations at comparable BoS cost.
Half-cut PERC from 2021 now competes against N-type TOPCon modules achieving 22–23% efficiency and HJT technology. Specifying this series for a new installation in 2026 results in lower annual yield per m² and a worse LCOE compared to currently available next-generation modules, often available in the same price bracket.
- Efficiency of 20.8% is 1.0pp below the database median (21.8%)
- 208.1 W/m² power density is 10.0 W/m² below database median (218.1 W/m²) - requires larger installation area
- Temperature coefficient of -0.35%/°C is 0.05pp worse than database median (-0.30%/°C) - higher losses in summer heat
- At 21.0 kg, this panel is 5.5 kg lighter than database median (26.5 kg) - easier handling during installation
- In the top 75% for efficiency among all N-type panels
Specifications
Simulations
Degradation from this panel's own datasheet figures. No inverter, soiling or shading losses.
Alternatives
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