Strong in heat, needs the roof space
The Jolywood JW Max series was designed for maximum yield from the same surface area - primarily thanks to n-type TOPCon cells, which operate more stably over time and better withstand real-world operating conditions than classic p-type solutions. These are bifacial modules, capable of capturing additional energy from reflected light - especially where the surface is light-coloured (e.g., membrane roofs, gravel, concrete, snow). Their construction, featuring dual glass (dual-glass), enhances resistance to micro-cracks, moisture and temperature fluctuations, effectively reducing the risk of power degradation and minimizing service issues over the long term. The JW Max is an excellent choice for investors seeking higher energy yield while minimizing energy costs, and ensuring reliable performance for years to come - particularly suitable for commercial and industrial installations, solar farms and projects in harsher environmental conditions. Against many competing series, this product stands out due to its low degradation rate and focus on long-term performance stability, not just catalogue specifications.
Ranking
Signals from the data
Commercial, utility-scale and hot-climate.
Roofs where every square metre has to count.
Top 19% of the TOPCon 650-700 W segment, against a median of -0.290.
Bottom 25% of the TOPCon 650-700 W segment, against a median of 223.7.
Jolywood was among the first manufacturers to industrialize n-type TOPCon at scale under the Niwa Max brand. Cells deliver a temperature coefficient of approximately −0.30%/°C and are free from LID, resulting in higher real-world annual yield compared to standard p-type PERC cells under identical irradiance conditions.
The 23% peak efficiency matches the top peer comparables — DAS Solar DAS-DH132NC (23%) and New East Solar NESE 66THB-G12 (23.02%) — placing JW Max in the top 10% of the 700+ Wp module segment and directly minimizing LCOE and BoS cost per installation.
Dual-glass encapsulation delivers superior resistance to moisture, UV, and microcracks compared to standard backsheet designs. Bifaciality enables 5–15% additional energy yield on high-albedo surfaces such as gravel, concrete, EPDM membrane, or snow, making it particularly valuable for utility-scale and industrial rooftop applications.
Jolywood guarantees a maximum 1% first-year degradation and ≤0.40%/yr thereafter, ensuring >87% of nameplate power is retained after 30 years. The 0.40%/yr annual degradation rate is more favorable than the 0.45%/yr standard common among PERC module suppliers, directly lowering lifetime LCOE.
Jolywood is listed as a BNEF Tier-1 bankable manufacturer (confirmed 2020–2026) with approximately 10 GW annual production capacity. This status is a prerequisite for bank-financed utility-scale and commercial PV projects, reducing counterparty risk for institutional investors and project lenders.
Jolywood ranks approximately 17th globally by module shipment volume (Wood Mackenzie / TaiyangNews TOP Solar Modules, August 2025), well below LONGi, JA Solar, Trina Solar, and JinkoSolar. In prosumer and commercial tender projects, lower brand visibility may affect investor confidence and require extended documentation during tech-insurance underwriting.
- At 22.1% efficiency, this panel is on par with typical TOPCon 650-700W modules
- 220.5 W/m² power density is 3.2 W/m² below TOPCon 650-700W median (223.7 W/m²) - requires larger installation area
- Temperature coefficient of -0.28%/°C matches the TOPCon 650-700W median
- Weight of 38.1 kg is 3.5 kg above TOPCon 650-700W median (34.6 kg) - verify structural support
- 80% bifaciality enables rear-side power generation, boosting yield by 4-12% on reflective surfaces
Specifications
Datasheet charts
Measured curves published by Jolywood in this model's datasheet. A chart carrying a wattage was measured on that variant alone - only the ones that describe 685 Wp appear here. The rest cover the whole series.
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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