Efficiency leader, no clear weak spot
JA Solar JAM54D41 LR (DeepBlue 4.0 Pro) series are full black monofacial modules designed for maximally aesthetic rooftop installations, with no compromises on durability. The use of n-type TOPCon cells translates to more stable performance over time and better resistance to typical degradation phenomena, genuinely reducing the risk of yield drops in the long term. The key advantage of this series is the double glass construction - instead of a traditional foil-backlaminated module, you get a sturdier, better-protected module, more resistant to moisture, UV exposure, and micro-cracks that can occur, for example, under snow loads or during transport.
The JAM54D41 LR is particularly suitable for single-family homes and multi-family buildings' rooftops, where aesthetics, reliability, and trouble-free operation are key. Compared to many competitive full-black panels, it stands out with the combination of n-type and double glass, delivering more predictable performance in demanding conditions.
Ranking
Signals from the data
Residential, shaded-installations and cold-climate.
Top 17% of the TOPCon 400-450 W segment, against a median of 22.00%.
N-type TOPCon cells deliver a temperature coefficient of -0.29%/°C versus ~-0.35%/°C for standard PERC, yielding higher output on hot days. Annual degradation of ~0.4% post year-1 and inherent resistance to LID/LeTID reduce long-term power loss compared to the PERC generation.
The 22.0–22.8% efficiency range matches best-in-class peers — on par with IBC Solar LS-TA2 (22.8%) and Sunlike SKT455 (22.8%). By comparison, the Waaree ARKA series reaches only 20.93% at the same 455 Wp power class, a difference of ~1.9 percentage points.
A rear tempered glass pane replaces the polymer backsheet, providing superior moisture ingress resistance, UV stability, and micro-crack resistance under mechanical stress or transport. The module is rated for snow loads up to 5,400 Pa and wind loads up to 2,400 Pa, relevant for Polish climate conditions with typical snow loads of 1,500–3,000 Pa (zones II–III per PN-EN 1991-1-3).
JA Solar guarantees ≥87.4% of nominal power after 30 years (~0.4%/year post year-1 degradation), exceeding the 25-year standard offered by Sunlike Solar and Waaree ARKA in the same power class. The extended warranty horizon lowers the installation's LCOE over the full system lifetime.
JA Solar is consistently listed as a BNEF Tier-1 (bankable) manufacturer and ranks among the top five global PV module producers, with manufacturing capacity exceeding 100 GW/year as of Q1 2025. This ensures supply chain stability and credible warranty serviceability throughout the full 30-year power warranty period.
The product warranty stands at 15 years, while premium brands such as Maxeon, REC Alpha, and IBC Solar (one of the peer comparables) offer 20–25 years as standard. For a double-glass n-type module priced above the segment median, this falls short of top-tier buyer expectations.
The LR variant is monofacial (no rear-side generation); the sibling JAM54D41/LB bifacial double-glass series delivers up to +6.3% additional rear-side yield. On flat-roof installations with high-albedo surfaces (gravel ballast, white TPO membrane, light metal roofing), the monofacial design foregoes an estimated 15–30 kWh/kWp per year under Polish irradiation conditions (~1,000–1,100 kWh/m²/year).
- Efficiency of 22.3% matches the TOPCon 400-450W median
- Power density of 222.7 W/m² matches the TOPCon 400-450W median
- At -0.29%/°C, hot weather performance is typical for TOPCon 400-450W panels
- #5100 for efficiency, #2165 for temperature performance out of 14005 panels
Specifications
Datasheet charts
Measured curves published by JA Solar in this model's datasheet. A chart carrying a wattage was measured on that variant alone - only the ones that describe 445 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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