--- title: "Canadian Solar CS6.2-66TB-655 655W Solar Panel - Specs & Review | ComparePV" description: "Canadian Solar CS6.2-66TB-655 655W solar panel. Specs: 24.20% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/csi-solar-co-ltd-canadian-solar-cs6-2-66tb-655" updated: 2026-09-11 --- # Canadian Solar CS6.2-66TB-655 Space saver, no clear weak spot 249 panels in the segment TOPCon 650-700 W ## Identity - **Manufacturer:** Canadian Solar - **Model:** CS6.2-66TB-655 - **Series:** TOPBiHiKu6 - **Rated power:** 655 W - **Cell technology:** TOPCon - **Bifacial:** yes ## How it compares Compared against segment TOPCon 650-700 W (249 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 655 W | 665 W | Typical | | | Module efficiency | 24.20% | 22.40% | Strong - top 12% | 184 | | Power density | 242.5 | 223.7 | Strong - top 11% | 172 | | Temperature coefficient | -0.290 | -0.290 | Typical | 2,165 | | Weight (kg) | 32.8 kg | 34.6 kg | Typical | | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 24.20% | 22.40% | Strong - top 12% | 184 | | Power density | 242.5 | 223.7 | Strong - top 11% | 172 | | Temperature coefficient | -0.290 | -0.290 | Typical | 2,165 | | Weight per kWp | 50.1 | 53.2 | Typical | 3,588 | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Strengths - **242.5 watts per square metre** - Top 11% of the TOPCon 650-700 W segment, against a median of 223.7. - **24.20% module efficiency** - Top 12% of the TOPCon 650-700 W segment, against a median of 22.40%. - **Best for:** Utility-scale, commercial and hot-climate. ## Specification ### Electrical - **Rated power (Pmax):** 655 W - **Efficiency:** 24.20 % - **Voltage at Pmax (Vmp):** 42.70 V - **Current at Pmax (Imp):** 15.36 A - **Open-circuit voltage (Voc):** 50.40 V - **Short-circuit current (Isc):** 16.38 A - **Max system voltage:** 1500 V ### Temperature - **Temperature coefficient of Pmax:** -0.290 %/degC - **Temperature coefficient of Voc:** -0.250 %/degC - **Temperature coefficient of Isc:** 0.045 %/degC - **NOCT:** 41 degC ### Cell and construction - **Cell type:** Monocrystalline - **Cell technology:** TOPCon - **Cell count:** 132 - **Bifacial:** yes - **Bifacial gain:** 20.00 ### Physical - **Length:** 2382 mm - **Width:** 1134 mm - **Thickness:** 30 mm - **Weight:** 32.8 kg - **Area:** 2.70 m2 - **Power density:** 242.5 Wp/m2 ### Warranty and degradation - **Product warranty:** 12 years - **Performance warranty:** 30 years - **Output guaranteed at end of warranty:** 87.4 % - **First-year degradation:** 1.00 % - **Annual degradation:** 0.40 % - **Output after 30 years:** 572 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 184 of 14005 | | Power density | 172 of 14005 | | Temperature coefficient | 2165 of 14005 | | Weight | 3588 of 14005 | | Warranty | 21 of 14005 | ## Pros - **N-type TOPCon – Low Degradation and Superior Thermal Performance** - N-type cells eliminate the LID (Light-Induced Degradation) phenomenon by removing boron-oxygen pairs, limiting annual degradation to 0.4% versus a typical 0.55% for PERC. A temperature coefficient of -0.29%/°C translates to meaningfully higher real-world energy yield in summer compared to PERC modules of the same nominal power rating. - **~80–85% Bifaciality and Energy Yield Premium** - Certified bifaciality of 80–85% enables an additional 2–10% energy harvest from reflected irradiance, depending on ground albedo. In ground-mounted arrays on light-colored surfaces or installations with white roofing membranes, this delivers a measurable advantage over monofacial modules at the same installation footprint. - **30-Year Linear Power Warranty (0.4%/year)** - The manufacturer guarantees no more than 1% degradation in year one and 0.4% per year thereafter, ensuring ≥87.4% of rated power after 30 years. Peer comparables from the AE Solar AURORA ME-132 and HY SOLAR groups do not offer equivalent terms as a manufacturer standard. - **DNV: Recommended Service Life of 35–45 Years** - Independent organization DNV (formerly DNV GL), following a manufacturing process review, TC600, DH2000, and PID testing (degradation \<2%), and a factory audit, recommends assuming a 35–45-year service life in financial models — significantly reducing LCOE compared to the standard 25-year assumption. - **BNEF Tier-1 / Bankability Q1 2026** - Canadian Solar remains on the BNEF Tier-1 list in Q1 2026 with an annual manufacturing capacity of 61,000 MWp, ensuring bankability for non-recourse financed projects. None of the peer comparables (PolyCrown, AE Solar, HY SOLAR) appear on this list, which has a direct impact on project financing terms. ## Cons - **Product Warranty of Only 12 Years** - The standard materials and workmanship warranty covers 12 years, whereas some premium-segment Tier-1 manufacturers — including Jinko Tiger Neo and LONGi Hi-MO 7 — offer 15 years. For investors with a long time horizon (>20 years), this may be a significant negotiating point at the time of purchase. - **Lower-Range Variants Below Market Efficiency** - Models in the 490–515 W range (efficiency ~21.7%) fall noticeably short of comparable products: HY SOLAR N-Type TOPCon reaches 23.8%, and PolyCrown Monocrystalline120 achieves 23.32%. Selecting a lower-power variant negates part of the series' technological advantage; for space-constrained projects, variants of ≥600 Wp must be specified without exception. ## About this series The Canadian Solar TOPBiHiKu6 series is designed to maximize energy gain in installations where every square meter counts and ensure stable production year after year. The key advantage of this lineup lies in combining **N-type TOPCon cells** with a **bifacial structure**, enabling the real utilization of reflected light from the ground surface-particularly in ground-mounted PV farms on light-colored surfaces, membrane roofs, or with appropriately selected mounting infrastructure. These modules focus on **low degradation** (without typical LID losses related to boron) and resistance to phenomena such as PID, translating to more predictable yields and lower long-term operational risks. The application of **multi-busbar architecture** improves current collection and minimizes the impact of micro-cracks, thereby enhancing reliability in challenging conditions. The TOPBiHiKu6 series is an excellent choice for PV farm investors and the C&I segment, seeking to reduce LCOE and system costs thanks to its high power density and robust module durability. ## Notable figures - 24.2% module efficiency - 1.8pp better than the \*\*TOPCon 650-700W\*\* median of 22.4% - Power density of 242.5 W/m² packs 18.8 W/m² more into the same footprint vs \*\*TOPCon 650-700W\*\* median (223.7 W/m²) - At -0.29%/°C, hot weather performance is typical for \*\*TOPCon 650-700W\*\* panels - At 32.8 kg, this panel is 1.8 kg lighter than \*\*TOPCon 650-700W\*\* median (34.6 kg) - easier handling during installation - Bifacial design (80% factor) captures reflected light - adds 4-12% yield on ground-mount or white roof ## Questions ### What warranty does Canadian Solar offer on the TOPBiHiKu6 series? Canadian Solar provides a 12-year product warranty (covering materials and workmanship) and a 30-year linear power output warranty on the TOPBiHiKu6 series. The linear power warranty guarantees predictable, gradual degradation over the entire service life, with no sudden drops in performance. This is one of the longest warranty standards currently available in the market. ### What are the benefits of bifacial technology in the TOPBiHiKu6 series, and is the price premium justified? The bifacial cells in the TOPBiHiKu6 series capture light reflected from the ground surface, achieving a bifaciality factor of up to 85%. In practice, this translates to an additional energy yield of 5–20%, depending on ground albedo. Bifacial technology is particularly cost-effective in ground-mounted systems on high-albedo surfaces, membrane rooftops, or elevated mounting structures where the rear side of the module is exposed to reflected irradiance. ### Do the Canadian Solar TOPBiHiKu6 panels perform well on overcast days and in low temperatures? Yes. The N-type TOPCon technology used in the TOPBiHiKu6 series features a low temperature coefficient of power, which means reduced losses on hot days and improved performance under diffuse winter light. The modules are certified for operation across a temperature range of -40°C to +85°C. Furthermore, the absence of boron doping eliminates Light-Induced Degradation (LID), a phenomenon in older P-type technologies that caused a permanent power loss after initial sun exposure. ### What is the maximum power output of the TOPBiHiKu6 series, and what types of installations is it designed for? The TOPBiHiKu6 series is available in configurations up to 660 Wp, making it a solution primarily designed for utility-scale solar farms and large commercial and industrial (C&I) installations. The high power density reduces the number of modules required per project, lowering balance-of-system (BoS) costs — including cabling, racking structures, and labor — which directly contributes to a reduction in LCOE. ### Are the TOPBiHiKu6 panels resistant to mechanical stress and PID? Yes. The TOPBiHiKu6 modules are certified to withstand snow loads of up to 5,400 Pa and wind loads of up to 3,600 Pa, corresponding to highly demanding weather conditions. The multi-busbar cell architecture (16BB) mitigates the effects of microcracks. The manufacturer also confirms full resistance to Potential-Induced Degradation (PID), which is especially critical in systems operating at high system voltages (up to 1,500 V). ### Is Canadian Solar a reliable manufacturer, and is the TOPBiHiKu6 series readily available on the market? Canadian Solar is a Tier 1 manufacturer, consistently ranked among the world's leading PV module suppliers by independent research institutions, including Bloomberg NEF and Wood Mackenzie. The TOPBiHiKu6 series is actively manufactured and available on the market. The company has a long track record of delivering utility-scale projects and a demonstrated history of honoring warranty obligations. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/1743549418690afa1ca7f09-2f8954e585b6.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [AIKO AIKO-A650-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a650-mae72mw) | 650 W | Cooler, lighter, +1.0 pp | | [AIKO AIKO-A680-MDE72Mw](https://comparepv.com/panel/aiko-aiko-a680-mde72mw) | 680 W | Cooler, lighter, +1.0 pp | | [AIKO AIKO-A675-MDE72Mw](https://comparepv.com/panel/aiko-aiko-a675-mde72mw) | 675 W | Cooler, lighter, +0.8 pp | | [AIKO AIKO-A645-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a645-mae72mw) | 645 W | Cooler, lighter, +0.8 pp | | [AIKO AIKO-A700-MAE78Dw](https://comparepv.com/panel/aiko-aiko-a700-mae78dw) | 700 W | +45 W, cooler, +0.8 pp | | [AIKO AIKO-A695-MAE78Dw](https://comparepv.com/panel/aiko-aiko-a695-mae78dw) | 695 W | +40 W, cooler, +0.7 pp | | [AIKO AIKO-G670-MCH72Mw](https://comparepv.com/panel/aiko-aiko-g670-mch72mw) | 670 W | Cooler, lighter, +0.6 pp | | [Canadian Solar CS6.2-66TB-600HP](https://comparepv.com/panel/csi-solar-co-ltd-canadian-solar-cs6-2-66tb-600hp) | 600 W | -55 W, heavier, -2.0 pp | | [Canadian Solar CS6.2-66TB-605HP](https://comparepv.com/panel/csi-solar-co-ltd-canadian-solar-cs6-2-66tb-605hp) | 605 W | -50 W, heavier, -1.8 pp | | [Canadian Solar CS6.2-66TB-610HP](https://comparepv.com/panel/csi-solar-co-ltd-canadian-solar-cs6-2-66tb-610hp) | 610 W | -45 W, heavier, -1.6 pp | | [Canadian Solar CS6.2-66TB-615HP](https://comparepv.com/panel/csi-solar-co-ltd-canadian-solar-cs6-2-66tb-615hp) | 615 W | -40 W, heavier, -1.4 pp | | [Longi Solar LR7-72HVHF-670M](https://comparepv.com/panel/longi-lr7-72hvhf-670m) | 670 W | Cooler, lighter, +0.6 pp | | [Jinko Solar JKM650-670N-66QL6-BDV (670W class)](https://comparepv.com/panel/jinko-solar-jkm650-670n-66ql6-bdv-670w-class) | 670 W | +15 W, cooler, +0.6 pp | --- Source: https://comparepv.com/panel/csi-solar-co-ltd-canadian-solar-cs6-2-66tb-655 Not in this file, on the page: a thirty-year output simulator, a bifacial gain calculator and alternatives filtered by how closely they match these dimensions.