Solid all-round for its segment
The Clelo Tech JT SLk(B) 690-720W solar panel series is a response to the growing demand of utility-scale farms and industrial installations for maximum power density. The N-type TOPCon technology used in them eliminates the problem of light-induced degradation, which translates into a significantly longer lifespan and more stable energy production compared to standard cells. Thanks to the use of large 210 mm format cells, these modules offer high unit power of up to 720W, allowing for a drastic reduction in mounting structure and cabling costs. A key differentiator is bifacial energy generation, which, thanks to a high bifaciality factor, allows for additional yields from the ground, making this series unrivaled on high-albedo surfaces. A low temperature coefficient guarantees efficient operation even on hot days, when traditional modules lose efficiency. This solution is dedicated to investors seeking the lowest cost of energy (LCOE) and uncompromising reliability in difficult environmental conditions. Choosing this series means space optimization and shortening the return on investment time by utilizing the latest material engineering achievements in the PV industry.
Ranking
Signals from the data
HJT cells deliver a temperature coefficient of -0.25%/°C, compared to -0.31%/°C for mainstream TOPCon modules (source: industry benchmarks, 2025). During a typical Polish summer (35°C), this translates to a real-world energy yield advantage of approximately 1.5–2% over TOPCon competitors in the same power class.
The maximum efficiency of 23.2% places this series on par with the best comparable products: DMEGC DMxxxG12T-B66HSW (23.2%) and Renesola RS9-700~720NBG-E1 (23.18%). The high power density allows installers to reduce the array footprint or maximize energy harvest on available land.
HJT technology achieves a bifaciality factor of up to 90–95% (vs. 80–90% for TOPCon), translating to an estimated albedo gain of approximately 10% in a typical ground-mount installation, compared to approximately 8% for TOPCon modules of equivalent power. The advantage is most pronounced on high-reflectivity surfaces such as sand, light gravel, and snow.
The 210 mm / 132-cell format at up to 720W enables a reduction in module count, stringing labor, and racking costs of approximately 10–15% relative to older 550–600W classes for the same installed capacity. The effect is particularly significant in projects exceeding 1 MWp.
The manufacturer provides a 30-year linear performance warranty, consistent with the premium HJT segment standard and equivalent to the warranties offered by comparable Renesola and DMEGC series. This directly reduces project risk and supports LCOE modeling over a 25–30 year horizon.
The manufacturer offers a product warranty (covering material and manufacturing defects) of only 15 years, while Tier-1 manufacturers such as Jinko Solar, JA Solar, Trina, and LONGi routinely provide 25-year coverage. The shortened product warranty increases servicing risk and may be a barrier to project finance structuring with lenders that require a minimum 25-year product guarantee.
Clelo Tech (Jiangsu Clelo Material Technologies, founded 2017) does not appear on the BloombergNEF Tier-1 Modules list for Q1 2026. The absence of bankability status may restrict access to debt financing for projects exceeding 1 MWp, where banks and ECA insurers routinely require modules from manufacturers on the BNEF list or an equivalent recognized registry.
HJT production line CAPEX stands at approximately 350 million RMB/GW, nearly twice the approximately 180 million RMB/GW required for TOPCon. The higher manufacturing cost results in a higher purchase price relative to comparable 720W TOPCon modules from larger producers, which may adversely affect installation CAPEX even when LCOE remains competitive.
- At 22.9% efficiency, this panel is on par with typical HJT 700-750W modules
- At 228.6 W/m² power density, roof space requirements are typical for HJT 700-750W panels
- At -0.24%/°C, hot weather performance is typical for HJT 700-750W panels
- At 37.3 kg, weight matches the HJT 700-750W median
- Bifaciality factor of 85% can add 4-13% extra yield with reflective mounting surface
Specifications
Datasheet charts
Measured curves published by Clelo Tech in this model's datasheet. A chart carrying a wattage was measured on that variant alone - only the ones that describe 710 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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