Light for its output, no clear weak spot
The LEDVANCE M685~705N66UB-SF-F7 series are dual-sided N-type modules using TOPCon technology, designed for high energy yield even under less-than-ideal conditions. The glass-glass construction enhances protection against moisture and mechanical stress, effectively reducing the risk of accelerated aging in challenging operational environments. Thanks to its limited PID effect and stable performance at higher temperatures, this series helps maintain predictable power output and minimizes power losses over time, which is critical for project profitability calculations. These modules are also designed for reliable installation-featuring original Stäubli MC4 EVO2 connectors and solutions for uniform current collection (MBB). This is an excellent choice for utility-scale PV farms, commercial and industrial installations, and large rooftops, where durability, resilience, and a long product warranty with linear power decay are essential.
Ranking
Signals from the data
Commercial, utility-scale and hot-climate.
Top 20% of the TOPCon 650-700 W segment, against a median of 53.2.
N-type TOPCon cells combined with a glass-glass (double-glass) construction reduce LID/LETID degradation and improve moisture sealing, which matters for industrial rooftop installations and utility-scale PV farms exposed to harsher operating conditions.
The manufacturer offers a 25-year product warranty and a 30-year linear power warranty - a term comparable to leading TOPCon peer series (Renesola RS9, Luxen N6, Hanersun HiTouch 6N), making long-term LCOE calculations more favorable.
Peak efficiency of 22.7% matches the best comparable TOPCon series on the market (Renesola RS9-685~705NG-E1, Luxen N6, Hanersun HiTouch 6N), so the module does not lag behind the 2024-2026 top tier in performance.
The use of certified Stäubli MC4 EVO2 connectors and multi-busbar (MBB) cell architecture improves electrical connection reliability and current collection uniformity, translating into lower resistive losses across the installation.
The bifacial construction captures additional reflected irradiance on the rear side of the module, which on bright ground surfaces or in ground-mount configurations can boost annual energy yield by several percentage points versus monofacial modules.
LEDVANCE is not on BloombergNEF's Tier-1 list (as of 2026), unlike some suppliers of comparable TOPCon series. This can complicate securing project financing for large-scale PV farms, as banks often require Tier-1-listed modules.
The LEDVANCE brand has operated since 2016, and the M685~705N66UB-SF-F7 series was only released in 2024 - a shorter field history means less real-world degradation data compared to manufacturers with a longer track record in the TOPCon segment.
- At 22.4% efficiency, this panel is on par with typical TOPCon 650-700W modules
- At 223.7 W/m² power density, roof space requirements are typical for TOPCon 650-700W panels
- At -0.30%/°C, hot weather performance is typical for TOPCon 650-700W panels
- Bifaciality factor of 70% can add 4-10% extra yield with reflective mounting surface
- #4970 for efficiency, #6093 for temperature performance out of 14005 panels
Specifications
Datasheet charts
Measured curves published by LEDVANCE in this model's datasheet. A chart carrying a wattage was measured on that variant alone - only the ones that describe 695 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 1390 panels of the same or similar size to this one, within ±10 mm. See them here Found 1400 panels of the same or similar size to this one, within ±25 mm. See them here Found 1400 panels of the same or similar size to this one, within ±50 mm. See them here Found 1432 panels of the same or similar size to this one, within ±100 mm. See them here