Efficiency leader, short guarantee
JA Solar JAM72S30 LR series are glass-backsheet monofacial modules based on P-type Mono PERC cells, designed for high energy yield in commercial and industrial installations. The application of half-cell architecture and MultiBusBar contact technology helps minimize resistive losses and maintain better performance when part of the module is intermittently shaded, translating to more stable string operation and predictable results.
A key feature of this series is its project-cost-focused approach: more power per module means fewer panels, shorter installation time, and lower DC-side equipment costs. The modules also feature enhanced mechanical durability, facilitating selection for roofs of halls, warehouses, and large structures where reliable operation under wind and snow loads is essential.
For installers, the weatherproof IP68 junction box and practical wiring harness are important, while for investors, the long-term, linear power warranty supports profitability over many years.
Ranking
Signals from the data
Commercial, utility-scale and shaded-installations.
Owners who want a long output guarantee.
Top 1% of the PERC 550-600 W segment, against a median of 21.29%. Ranked 6,076th in the whole database.
Top 1% of the PERC 550-600 W segment, against a median of 212.9. Ranked 6,045th in the whole database.
Top 4% of the PERC 550-600 W segment, against a median of 52.7. Ranked 1,938th in the whole database.
Bottom 24% of the PERC 550-600 W segment, against a median of 27 yrs.
JA Solar has maintained a continuous presence on the BloombergNEF Tier-1 bankable module manufacturer list and operates with over 80 GWp of annual production capacity as of 2025. For bank-financed projects this eliminates the need for additional manufacturer due-diligence reviews by lenders or insurers.
144 half-cut, 182 mm cells combined with a MultiBusBar (MBB) contact grid reduce resistive losses and limit the impact of partial shading on string output. A single bypass diode failure blocks a smaller fraction of module power than in full-cell designs, improving MPPT tracking stability.
Six power variants within a single series (560, 565, 570, 575, 580, 585 W) allow precise matching to an inverter's MPPT window without mixing series. This simplifies the electrical design and reduces BoS costs for systems from 100 kWp upward.
The module carries IEC 61215, IEC 61730, UL 61215, UL 61730, ISO 9001, ISO 14001, and ISO 45001 certifications. The IP68-rated junction box satisfies lender and insurer requirements for both European and North American commercial project financing.
A 1500 V system voltage rating enables longer strings - more modules per MPPT input - reducing the number of inverter inputs, lowering DC cable runs, and cutting per-watt BoS costs. This advantage is most material on commercial and industrial rooftop systems above 500 kWp.
Maximum module efficiency reaches 22.1%, while direct N-type competitors in the same power class achieve 22.6-22.65% (Hanersun HN18-72H, Q-SUN Qrystal N8, Risen RSM144-9). The ~0.5 percentage-point gap means roughly 4-6 additional modules per 1 MWp are required - or a lower peak power output on a fixed roof area.
P-type PERC cells exhibit light-induced degradation (LID) of approximately 2% in the first year of operation, compared with ~1% for N-type TOPCon modules. In P90/P99 energy yield analyses required by project lenders, this difference reduces projected annual generation and can negatively affect the DSCR.
The JAM72S30 LR series is strictly monofacial (glass-backsheet) with no bifacial option. Ground-mounted systems and flat roofs with light-colored membranes typically see 5-15% additional annual yield from rear-side albedo gain with bifacial modules, giving N-type bifacial alternatives a lower LCOE on eligible sites.
- At 22.1% efficiency, this panel is 0.8pp above typical PERC 550-600W modules (median: 21.3%)
- 221.1 W/m² power density - 8.2 W/m² more than PERC 550-600W median (212.9 W/m²), more power per roof area
- At -0.35%/°C, hot weather performance is typical for PERC 550-600W panels
- Weight of 28.0 kg (2.8 kg below PERC 550-600W median of 30.8 kg) allows easier transport and roof mounting
- Ranked #6076 out of 14129 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 585 Wp appear here. The rest cover the whole series.
Simulations
Degradation from this panel's own datasheet figures. No inverter, soiling or shading losses.
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 1211 panels of the same or similar size to this one, within ±50 mm. See them here Found 3683 panels of the same or similar size to this one, within ±100 mm. See them here
About the JAM72S30 LR (p-type Monofacial Modules) series
These answers cover the whole series. Where a figure differs, the specification above is this module's own.