Strong in heat, needs the roof space
The JS Solar 144 SERIES solar panel series utilizes an advanced design based on Half-Cut cell technology, which directly translates into higher module efficiency and a significant reduction in energy losses resulting from internal resistance. By dividing the cells into two independent sections, these panels demonstrate exceptional shading resistance, allowing for stable power production even in difficult installation conditions where traditional modules lose efficiency. An innovative approach to busbar placement in MBB technology minimizes the risk of micro-cracks, which guarantees long-term reliability and mechanical stability of the entire installation. Products from this line are an ideal solution for large-scale photovoltaic farms and large commercial facilities, where optimizing LCOE costs and maximizing yields per square meter of area are of key importance. This series stands out from the competition with an excellent temperature coefficient of power, which ensures the panels maintain high productivity even during summer heat. By choosing the JS Solar 144 SERIES, investors gain advanced protection against LID and LeTID degradation, which translates into a predictable and secure return on investment in the Polish climate.
Ranking
Signals from the data
Commercial, utility-scale and shaded-installations.
Roofs where every square metre has to count, tight roof space and weight-limited structures.
Top 2% of the PERC 350-400 W segment, against a median of -0.350. Ranked 1,309th in the whole database.
Bottom 4% of the PERC 350-400 W segment, against a median of 199.0. Ranked 13,244th in the whole database.
Bottom 4% of the PERC 350-400 W segment, against a median of 19.90%. Ranked 13,249th in the whole database.
Bottom 18% of the PERC 350-400 W segment, against a median of 55.8.
Splitting PERC cells into two independent half-cut sections reduces internal module resistance by approximately 25-30% compared to full-cell designs, while the multi-busbar (MBB) layout distributes mechanical stress and limits microcrack propagation. In practice, this translates to higher partial-shade tolerance and more stable output on rooftops with obstructions.
The series employs cell stabilization processes that eliminate light-induced degradation (LID) and thermally activated degradation (LeTID), which are inherent failure modes in conventional PERC modules. The manufacturer warrants predictable power retention under a 25-year linear power warranty, which is relevant for LCOE calculations in the Central European climate.
The JS Half-Cut Mono(144) datasheet listed in the ENF Solar database specifies a Pmax temperature coefficient of -0.28%/°C, compared to the typical PERC range of -0.35% to -0.40%/°C. The ~0.07-0.12 pp/°C advantage translates into measurably higher energy yield during summer peaks above 35°C ambient.
A broad configuration range — from 340 Wp (Poly variants) to 455 Wp (Mono variants) across 18 SKUs — allowed precise matching to different string-inverter and MPPT topologies without power optimizers, reducing BoS costs in utility and large commercial installations.
JS Solar 144 SERIES has discontinued status. The lack of ongoing production creates significant operational risk: a mechanically damaged module cannot be replaced with an identical unit, which may require restringing or adding power optimizers to maintain MPPT compatibility. For commercial installations, this directly affects payback period modeling and O&M budgets.
Competing 455 Wp modules (LEDVANCE M435~455N54LB-SF-F7: 22.77%; Sunlike Solar SKT420~455M10-108D6: 22.80%; Solitek SOLRIF D: 22.56%) outperform by ~1.7-2.0 percentage points, meaning roughly 9-10% more roof area is required for the same nameplate capacity. The gap indicates peers use N-type technology (TOPCon or HJT), which surpassed 66% of global production capacity in 2024.
JS Solar (Yixing JS Solar Co., Ltd.) does not appear on the BNEF Tier-1 bankable module manufacturers list (verified against Q4 2025 BNEF results). Absence from the bankable list significantly complicates or prevents project-finance debt underwriting by independent commercial banks for installations above 10 MW, effectively restricting the series to self-funded or smaller commercial projects.
The JS Half-Cut Mono(144) datasheet guarantees 80.7% of Pmax remaining after 25 years. Leading Tier-1 manufacturers (JA Solar JAM72S30, JinkoSolar Tiger Pro) warrant 84.8-87.4% Pmax over the same horizon. A 4-7 pp gap equates to measurably lower annual energy output in year 25 — a meaningful variable in project-level LCOE sensitivity analysis.
- At 17.9% efficiency, this panel is 1.6pp below the PERC 0-400W median of 19.4%
- 178.9 W/m² power density is 15.5 W/m² below PERC 0-400W median (194.4 W/m²) - requires larger installation area
- Temperature coefficient of -0.28%/°C vs median -0.36%/°C means ~3% less power loss at 65°C
- At 22.5 kg, this panel is 2.0 kg heavier than the PERC 0-400W median (20.5 kg) - more demanding for installation crews
- #13249 for efficiency, #1309 for temperature performance out of 14005 panels
Specifications
Simulations
Degradation from this panel's own datasheet figures. No inverter, soiling or shading losses.
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