Middle of its segment, heavy for its output
Jolywood JW-HD108N Series panels are an advanced solution based on innovative N-type TOPCon cell technology, which redefines efficiency standards in challenging lighting conditions. This series stands out with its bifacial (double-sided) glass-glass construction, which ensures not only additional energy yield from reflected light, but also exceptional resistance to light-induced degradation (LID) and external factors such as moisture or ammonia. The use of a smaller number of cells in the 108 format makes the modules compact and perfectly suited for residential roofs while maintaining high power output. For investors, a key benefit is the minimal annual efficiency decline, which translates into stable and predictable profits over decades. Unlike standard P-type modules, the JW-HD108N series offers a better temperature coefficient, allowing the system to operate more efficiently on hot days. It is the ideal choice for those looking for maximum durability and fire safety resulting from the hermetic double-glass construction. This solution combines aesthetics with uncompromising technology, outperforming the competition in terms of service life and operational stability in the variable Polish climate.
Ranking
Signals from the data
Residential, shaded-installations and hot-climate.
Weight-limited structures, tight roof space and roofs where every square metre has to count.
Bottom 12% of the TOPCon 400-450 W segment, against a median of 51.4.
Bottom 23% of the TOPCon 400-450 W segment, against a median of 22.00%.
Bottom 23% of the TOPCon 400-450 W segment, against a median of 220.2.
The JW-HD108N's N-type TOPCon cells deliver a power temperature coefficient of -0.28%/°C, compared to -0.35% to -0.40%/°C typical of P-type PERC modules. Under real-world conditions where module temperatures routinely exceed 60°C in summer, this advantage translates to a 2–4% higher annual energy yield versus PERC technology.
Jolywood guarantees at least 87.4% of rated power after 30 full years of operation — five years longer than the standard 25-year warranties offered by comparable series from Risen (RSM96-11-440-460BNDG) and SunKean (SKT440~460M12-96D4). The extended warranty horizon lowers the project LCOE and reduces investor risk when structuring project finance.
The hermetic glass-glass encapsulation, combined with bifacial cell architecture, enables an additional energy yield of up to +25% over a monofacial module at albedo values ≥20%. The dual-glass build also eliminates moisture-induced degradation (DH), ammonia corrosion, LID, and PID — a critical advantage for installations exposed to high humidity and frequent precipitation.
Jolywood appears on BloombergNEF's Q2 2026 Tier-1 PV Module Manufacturer list, confirming its ability to participate in projects financed by international banking institutions. Tier-1 status reduces credit risk for lenders and simplifies insurance underwriting for both residential and commercial PV portfolios.
The 108 half-cut cell count results in a physically smaller and lighter module footprint compared to the more common 120–132 cell formats, simplifying installation on pitched residential rooftops with limited usable area. The smaller format also reduces per-cell mechanical stress, lowering susceptibility to micro-cracks (MIC) during handling and transport.
The glass-glass construction results in a module weight of approximately 27.3 kg (per R2 variant datasheets), compared to 20–22 kg for equivalent glass-backsheet modules. On older residential roof structures, a structural assessment or rafter reinforcement may be required, adding to BoS costs.
The lowest-efficiency variant in the series reaches 21.52%, while direct competitors SunKean SKT460 (23.02%) and Risen RSM96-460 (23.00%) start from a higher baseline. The ~1.5 percentage point gap means that 1–2 additional modules per 10 kWp may be required on space-constrained rooftops when compared to the most efficient alternatives in the same segment.
- At 21.5% efficiency, this panel is on par with typical TOPCon 400-450W modules
- Power density of 215.2 W/m² is 5.0 W/m² below TOPCon 400-450W median (220.2 W/m²) - needs more roof space
- At -0.30%/°C, hot weather performance is typical for TOPCon 400-450W panels
- At 24.6 kg (2.6 kg above TOPCon 400-450W median of 22.0 kg), requires checking roof load capacity
- Bifacial design (80% factor) captures reflected light - adds 4-12% yield on ground-mount or white roof
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 430 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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