Space saver, no clear weak spot
The JA Solar JAM72D40 LB series is designed to maximize yield in projects where every square meter counts, and predictable energy production is key. The use of N-type TOPCon cells helps minimize typical losses seen in older technologies and maintains stable module performance over the long term. The double-glass construction enhances environmental resistance, valued by investors prioritizing longevity and lower service risks. A key advantage is bifacial capability-the module can harvest energy from both sides, effectively boosting yield on bright rooftops, ground-mounted structures, or farms with appropriately oriented module surfaces. Thanks to half-cut cells and a multi-busbar configuration, the series performs better with microcracking and electrical loads, simplifying string design. This is the choice for PV farms, large industrial rooftops, and installations where LCOE, reliability, and consistent quality are top priorities.
Ranking
Signals from the data
Utility-scale, commercial and shaded-installations.
Top 19% of the TOPCon 600-650 W segment, against a median of 227.7.
Top 23% of the TOPCon 600-650 W segment, against a median of 22.80%.
The top variant delivers 23.2% module efficiency, outperforming direct comparables: GCL-M12/60H (21.7%), Risen TITAN (21.7%), and LONGi Hi-MO X6 Explorer (22.8%). The 0.4–1.5 pp advantage translates into meaningfully higher energy yield per unit of roof or ground area.
N-type TOPCon cells eliminate the LID (Light Induced Degradation) effect common in P-type PERC. Annual degradation is approximately 0.4%/year (after ~1% first-year loss) vs. 0.5–0.55%/year for PERC, resulting in approximately 87% retained nameplate power after 30 years — consistent with JA Solar's linear power warranty.
Bifaciality factor reaches ~80% (±5%), delivering an additional 5–15% energy yield on ground-mount and light-colored rooftop installations compared to monofacial modules. The dual-glass laminate eliminates the backsheet as a failure point and improves resistance to moisture ingress, PID, and UV degradation.
JA Solar guarantees linear power degradation not exceeding ~0.55%/year over 30 years — a bankability-grade commitment critical for LCOE modeling and non-recourse project finance underwriting. The product (workmanship) warranty period is 12 years.
JA Solar holds BNEF Tier-1 bankable status and ranked #1 in the Wood Mackenzie Global Solar Module Manufacturer ranking for H1 2025 (score: 91.7/100) with annual output exceeding 80 GW. Manufacturer bankability reduces project finance risk and supports non-recourse debt financing for utility-scale PV farms.
The dual-glass construction weighs approximately 31.8 kg (2,333 × 1,134 × 30 mm), roughly 4–5 kg heavier than comparable single-glass modules at this power class. On industrial rooftops with structural load capacity below 15 kg/m², an engineering review is required before specifying this series.
The workmanship and materials warranty is 12 years — in line with the segment average, but below LONGi Solar's 15-year coverage on the Hi-MO X6 Explorer. For investors prioritizing execution risk mitigation over a 15–20-year horizon, this gap may serve as a valid negotiation point.
- Efficiency of 23.2% matches the TOPCon 600-650W median
- Power density of 232.5 W/m² packs 4.8 W/m² more into the same footprint vs TOPCon 600-650W median (227.7 W/m²)
- Temperature coefficient of -0.29%/°C matches the TOPCon 600-650W median
- Bifaciality factor of 80% can add 4-12% extra yield with reflective mounting surface
- Ranked #1306 out of 14005 panels for efficiency in the database
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 615 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.
Found 44 panels of the same or similar size to this one, within ±10 mm. See them here Found 48 panels of the same or similar size to this one, within ±25 mm. See them here Found 1186 panels of the same or similar size to this one, within ±50 mm. See them here Found 3657 panels of the same or similar size to this one, within ±100 mm. See them here