--- title: "Clelo Tech JT705SLkB 705W Solar Panel - Specs & Review | ComparePV" description: "Clelo Tech JT705SLkB 705W solar panel. Specs: 22.70% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/clelo-tech-jt705slkb" updated: 2026-09-11 --- # Clelo Tech JT705SLkB Middle of its segment, modest efficiency 222 panels in the segment HJT 700-750 W ## Identity - **Manufacturer:** Clelo Tech - **Model:** JT705SLkB - **Series:** JT SLk(B) 690-720W - **Rated power:** 705 W - **Cell technology:** HJT - **Bifacial:** yes ## How it compares Compared against segment HJT 700-750 W (222 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 705 W | 715 W | Weak - bottom 22% | | | Module efficiency | 22.70% | 23.02% | Weak - bottom 20% | 3,307 | | Power density | 227.0 | 230.2 | Weak - bottom 22% | 3,361 | | Temperature coefficient | -0.240 | -0.240 | Typical | 13 | | Weight (kg) | 37.3 kg | 38.3 kg | Typical | | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 22.70% | 23.02% | Weak - bottom 20% | 3,307 | | Power density | 227.0 | 230.2 | Weak - bottom 22% | 3,361 | | Temperature coefficient | -0.240 | -0.240 | Typical | 13 | | Weight per kWp | 52.9 | 53.6 | Typical | 6,623 | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Watch out for - **22.70% module efficiency** - Bottom 20% of the HJT 700-750 W segment, against a median of 23.02%. - **227.0 watts per square metre** - Bottom 22% of the HJT 700-750 W segment, against a median of 230.2. - **Not ideal for:** Tight roof space and roofs where every square metre has to count. ## Specification ### Electrical - **Rated power (Pmax):** 705 W - **Efficiency:** 22.70 % - **Voltage at Pmax (Vmp):** 42.25 V - **Current at Pmax (Imp):** 16.69 A - **Open-circuit voltage (Voc):** 50.15 V - **Short-circuit current (Isc):** 17.49 A - **Max system voltage:** 1500 V ### Temperature - **Temperature coefficient of Pmax:** -0.240 %/degC - **Temperature coefficient of Voc:** -0.240 %/degC - **Temperature coefficient of Isc:** 0.040 %/degC - **NOCT:** 43 degC ### Cell and construction - **Cell type:** Monocrystalline - **Cell technology:** HJT - **Cell count:** 132 - **Bifacial:** yes - **Bifacial gain:** 30.00 ### Physical - **Length:** 2384 mm - **Width:** 1303 mm - **Thickness:** 33 mm - **Weight:** 37.3 kg - **Area:** 3.11 m2 - **Power density:** 227.0 Wp/m2 ### Warranty and degradation - **Product warranty:** 15 years - **Performance warranty:** 30 years - **Output guaranteed at end of warranty:** 88.3 % - **First-year degradation:** 1.00 % - **Annual degradation:** 0.37 % - **Output after 30 years:** 622 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 3307 of 14005 | | Power density | 3361 of 14005 | | Temperature coefficient | 13 of 14005 | | Weight | 6623 of 14005 | | Warranty | 21 of 14005 | ## Pros - **HJT Technology – Best-in-Class Temperature Coefficient** - 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. - **Up to 23.2% Efficiency – Top of the 720W Segment** - 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. - **Exceptionally High HJT Bifaciality Factor** - 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. - **Up to 720W per Module – Lower BoS Costs** - 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. - **30-Year Linear Power Warranty** - 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. ## Cons - **Product Warranty Limited to 15 Years** - 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. - **Manufacturer Not Listed on BNEF Tier-1 Modules Q1 2026** - 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. - **Higher Module Cost Inherent to HJT Technology** - 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. ## About this series 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. ## Notable figures - At 22.7% efficiency, this panel is on par with typical \*\*HJT 700-750W\*\* modules - Power density of 226.9 W/m² is 3.2 W/m² below \*\*HJT 700-750W\*\* median (230.2 W/m²) - needs more roof space - Temperature coefficient of -0.24%/°C matches the \*\*HJT 700-750W\*\* median - Weight of 37.3 kg is typical for \*\*HJT 700-750W\*\* panels - 85% bifaciality enables rear-side power generation, boosting yield by 4-13% on reflective surfaces ## Questions ### How does the HJT technology used in the Clelo Tech JT SLk(B) series differ from conventional PERC cells? HJT (Heterojunction Technology) cells combine a monocrystalline silicon wafer with amorphous silicon layers, achieving module efficiencies of up to 23.2% and a significantly lower temperature coefficient than PERC. This translates to reduced power losses on hot days and inherent resistance to light-induced degradation (LID). In practice, the JT SLk(B) delivers higher annual energy yield than a comparable PERC module of the same nominal power throughout the entire 30-year operational lifetime. ### What warranty applies to the Clelo Tech JT SLk(B) 690–720W panels and what exactly does it cover? The JT SLk(B) series is backed by a 15-year product warranty covering material and workmanship defects, along with a 30-year linear power output warranty. Over those three decades, Clelo Tech guarantees that each module maintains a defined minimum performance level. Such an extended power warranty horizon is particularly critical for utility-scale PV farm investments, where financial models rely on energy production forecasts spanning exactly 25–30 years. ### How much additional energy can realistically be gained from the bifacial JT SLk(B) panels compared to monofacial modules? With a bifaciality factor of 85–90%, the JT SLk(B) captures irradiance from both the front and rear sides of the module. On high-albedo ground surfaces such as gravel, sand, or light-colored soil, the additional rear-side yield can reach 10–25% relative to a monofacial module. The greatest gains are achieved when single-axis trackers are combined with a bright ground cover beneath the array. ### Are the Clelo Tech JT SLk(B) 720W panels suitable for a residential rooftop installation? The JT SLk(B) 720W modules are engineered for utility-scale ground-mounted farms and industrial installations, not for typical single-family rooftops. The large 210 mm cell format, substantial module weight, and 720W power rating require robust three-phase inverters and reinforced mounting structures. For sloped residential roofs, smaller modules in the 400–450W range are a far better fit, offering easier handling and installation without requiring modifications to the roof truss structure. ### How does the JT SLk(B) series handle high summer temperatures — does it suffer significant efficiency losses? HJT technology delivers an exceptionally low Pmax temperature coefficient, typically in the range of -0.24% to -0.26%/°C, compared to approximately -0.35%/°C for PERC cells. When module surface temperatures reach 70°C in summer, power losses in the JT SLk(B) are up to 30% lower than in older-generation panels. In practical terms, this means the series retains a meaningful performance advantage over standard modules on the hottest and sunniest days of the year. ### How many Clelo Tech JT SLk(B) 720W panels are required to build a 1 MWp photovoltaic farm? At a nominal power of 720W, each module contributes 0.72 kWp, so a 1 MWp farm requires approximately 1,389 JT SLk(B) panels. By comparison, using typical 550W modules would require more than 1,818 units — over 430 panels more. A lower module count directly reduces costs for steel racking, DC cabling, and installation labor, shortening project delivery time and improving the overall LCOE of the investment. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/hjt-690-720w-b64bf0b68480.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [AIKO AIKO-A680-MDE72Mw](https://comparepv.com/panel/aiko-aiko-a680-mde72mw) | 680 W | -25 W, lighter, +2.5 pp | | [AIKO AIKO-A675-MDE72Mw](https://comparepv.com/panel/aiko-aiko-a675-mde72mw) | 675 W | -30 W, lighter, +2.3 pp | | [AIKO AIKO-A700-MAE78Dw](https://comparepv.com/panel/aiko-aiko-a700-mae78dw) | 700 W | Hotter, lighter, +2.3 pp | | [AIKO AIKO-A695-MAE78Dw](https://comparepv.com/panel/aiko-aiko-a695-mae78dw) | 695 W | Hotter, lighter, +2.2 pp | | [AIKO AIKO-G670-MCH72Mw](https://comparepv.com/panel/aiko-aiko-g670-mch72mw) | 670 W | -35 W, lighter, +2.1 pp | | [Longi Solar LR7-72HVHF-670M](https://comparepv.com/panel/longi-lr7-72hvhf-670m) | 670 W | -35 W, lighter, +2.1 pp | | [Jinko Solar JKM650-670N-66QL6-BDV (670W class)](https://comparepv.com/panel/jinko-solar-jkm650-670n-66ql6-bdv-670w-class) | 670 W | -35 W, lighter, +2.1 pp | | [Clelo Tech JT690SLkB](https://comparepv.com/panel/clelo-tech-jt690slkb) | 690 W | -15 W, -0.5 pp | | [Clelo Tech JT695SLkB](https://comparepv.com/panel/clelo-tech-jt695slkb) | 695 W | -10 W, -0.3 pp | | [Clelo Tech JT700SLkB](https://comparepv.com/panel/clelo-tech-jt700slkb) | 700 W | Very close match | | [Clelo Tech JT710SLkB](https://comparepv.com/panel/clelo-tech-jt710slkb) | 710 W | Very close match | | [Clelo Tech JT715SLkB](https://comparepv.com/panel/clelo-tech-jt715slkb) | 715 W | +10 W, +0.3 pp | | [Clelo Tech JT720SLkB](https://comparepv.com/panel/clelo-tech-jt720slkb) | 720 W | +15 W, +0.5 pp | | [AIKO AIKO-A805-GRH78Dw](https://comparepv.com/panel/aiko-aiko-a805-grh78dw) | 805 W | +100 W, heavier, +2.4 pp | | [AIKO AIKO-A800-GRH78Dw](https://comparepv.com/panel/aiko-aiko-a800-grh78dw) | 800 W | +95 W, heavier, +2.2 pp | | [AIKO AIKO-A795-GRH78Dw](https://comparepv.com/panel/aiko-aiko-a795-grh78dw) | 795 W | +90 W, heavier, +2.1 pp | --- Source: https://comparepv.com/panel/clelo-tech-jt705slkb Not in this file, on the page: the I-V and temperature curves lifted from the manufacturer's datasheet, a thirty-year output simulator, a bifacial gain calculator and alternatives filtered by how closely they match these dimensions.