Middle of its segment, needs the roof space
The JS Solar JSHC166M120 series consists of advanced photovoltaic modules that utilize half-cut cell technology to maximize energy yields in real-world installation conditions. Thanks to the use of M6 standard silicon wafers with a size of 166 mm, these panels offer an excellent power-to-area ratio, making them an ideal choice for installations with limited roof space. A key distinguishing feature of the series is the multi-busbar design, which not only reduces resistive losses but also significantly limits the risk of micro-cracks under the influence of varying temperatures. These modules effectively solve the problem of performance drops during partial shading, allowing for stable system operation even in more challenging location conditions. They are intended for both individual prosumers and commercial investors looking for reliable components with high resistance to mechanical loads, such as heavy snow or strong wind gusts. Compared to the competition, JS Solar JSHC166M120 stands out with its excellent material durability and certified resistance to ammonia and salt corrosion, which guarantees a long power plant lifespan even in demanding agricultural or coastal environments. This is a sound choice for professionals focusing on proven engineering and investment cost optimization.
Ranking
Signals from the data
Roofs where every square metre has to count and owners who want a long output guarantee.
Bottom 19% of the 255-455 W band, against a median of 207.9.
Bottom 22% of the 255-455 W band, against a median of 30 yrs.
The top-bin variant reaches 21.3% module efficiency, outperforming all peer comparables: ENCOR EC (20.59%), Boviet GAMMA SERIES™ (20.2%), and Boviet VEGA SERIES (20.0%). For space-constrained rooftops, this translates into meaningfully higher power output per m².
Halving the cell reduces per-string current by 50%, cutting I²R resistive losses and lowering hot-spot risk under partial shading. The MBB design reduces thermal stress in silver paste interconnects, statistically decreasing LeTID micro-crack incidence over the module's service life.
The series carries verified salt-mist resistance (IEC 61701) and ammonia corrosion resistance (IEC 62716) — no peer comparable (Boviet VEGA, Boviet GAMMA, ENCOR EC) lists both certifications simultaneously. This provides a genuine advantage for agrivoltaic and coastal installations where accelerated frame and bypass-diode degradation is a known risk.
The M6 166 mm format is one of the most thoroughly validated wafer standards in the PV industry, with multi-source wafer availability. Unlike the newer G12 (210 mm) format, it avoids racking and transport compatibility issues with standard steel mounting systems commonly used in European residential and C&I installations.
The manufacturer guarantees a linear power degradation schedule for 25 years, matching the warranty terms of all peer comparables. The guaranteed residual power after year 25 (typically ≥80.7%) supports LCOE assumptions for residential prosumers and small commercial projects.
JS Solar does not appear on the BNEF Tier-1 PV module manufacturer list (Q1 2026), while direct peer comparable Boviet Solar holds that status. For projects financed on a non-recourse basis by lenders requiring Tier-1 modules, the JSHC166M120 series may be excluded from approved component lists without additional manufacturer due diligence.
The series offers no bifacial option, whereas the Boviet VEGA SERIES (same max power of 375 Wp) is available in a bifacial configuration with a potential 5–15% yield gain from ground albedo. For ground-mounted systems on reflective substrates or green rooftops, the absence of a bifacial option results in a measurable long-term energy yield disadvantage.
- At 20.2% efficiency, this panel is 1.6pp below the database median of 21.8%
- Power density of 195.0 W/m² is 23.1 W/m² below database median (218.1 W/m²) - needs more roof space
- -0.34%/°C temperature coefficient - 0.04pp worse than database median (-0.30%/°C), expect higher hot weather losses
- 20.2 kg weight - 6.3 kg lighter than database median (26.5 kg), reducing installation effort
- #11956 for efficiency, #8778 for temperature performance out of 14005 panels
Specifications
Simulations
Degradation from this panel's own datasheet figures. No inverter, soiling or shading losses.
Alternatives
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