Strong in heat, no clear weak spot
The Jolywood JW-HT108N (Black Series) are panels designed for maximally aesthetic installations without compromising on premium technology. What sets them apart is their full-black design - a uniform color scheme for the cells, frames, and rear layer, ensuring the modules blend seamlessly with modern roofs, especially in highly exposed installations. The application of N-type cells in TOPCon technology translates to more stable performance over time and better resistance to typical efficiency losses, which is crucial for long-term operation. They are also monofacial modules, making them an ideal choice for pitched and flat roofs on single-family homes and smaller commercial buildings, where predictable yield and a consistent appearance matter. This series resolves the compromise between aesthetics and profitability - offering high efficiency and a refined structure, distinguishing itself from many "black" panels that are primarily a visual gimmick. This is a proposition for investors who want their PV installation to be discreet, durable, and technologically advanced.
Ranking
Signals from the data
Residential and commercial.
Top 4% of the TOPCon 400-450 W segment, against a median of -0.290. Ranked 1,309th in the whole database.
The 21.8–23% module efficiency range puts the series on par with the highest-performing peers in the comparison group: Risen RSM96 reaches a max. 23%, SunKean SKT440~460 achieves 23.02%, while Zonergy ZPM MH3-72 tops out at 21.16%. The JW-HT108N matches the efficiency leaders in its power class.
The temperature coefficient of power is –0.30%/°C, better than standard P-type PERC cells (–0.35% to –0.37%/°C). At a typical summer module temperature of 55 °C, this advantage translates to approximately 1.5–2 percentage points higher energy yield versus legacy PERC. N-type cells are inherently free from Light-Induced Degradation (LID).
Jolywood guarantees ≤1% first-year degradation and ≤0.40%/year linear degradation, resulting in ≥87.4% of rated power after 30 years. This outperforms standard 25-year PERC warranties (typically flooring at ~84.8% Pmax) and matches leading TOPCon lines such as JA Solar JAM72S30 and LONGi Hi-MO 6.
The JW-HT108N combines a fully black aesthetic (black cells, black frame, black backsheet) with TOPCon N-type cells — unlike many all-black alternatives that rely on older PERC technology. The visual appeal is not achieved at the cost of performance; efficiency remains on par with white-framed equivalents in the same power class.
Jolywood maintains Tier-1 status per BloombergNEF (confirmed 2025–2026), meaning bankability has been validated by at least six financial institutions in non-recourse project financing. Founded in 2008 with a specialization in N-type cells, the company's longevity reduces long-term warranty claim and technical support risk over a 20–30-year asset life.
The product (materials and workmanship) warranty is 12 years, while leading Tier-1 manufacturers in the all-black TOPCon segment (e.g. JA Solar Deep Blue 4.0, Trina Vertex S+) standardly offer 15–25 years. The gap is relevant when assessing long-term risk in externally financed projects or when calculating TCO for commercial installations.
- At 21.8% efficiency, this panel is on par with typical TOPCon 400-450W modules
- Power density of 217.7 W/m² matches the TOPCon 400-450W median
- At -0.28%/°C, hot weather performance is typical for TOPCon 400-450W panels
- #7022 for efficiency, #1309 for temperature performance out of 14005 panels
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 435 Wp appear here. The rest cover the whole series.
Simulations
Degradation from this panel's own datasheet figures. No inverter, soiling or shading losses.
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