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Canadian Solar CS6.2-66HB-645

CS6.2-66HB-645

645 Wp HJT Bifacial 90%
ComparePV verdict

Space saver, no clear weak spot

Rank 1,073 of 14,005
Compare panels Datasheet PDF
Power (Wp)
645
Strong · top 3%
Efficiency (%)
23.90
Strong · top 3%
Density (Wp/m²)
238.8
Strong · top 1%
Temp (%/°C)
-0.240
Typical · median -0.240
Weight (kg)
32.8
Strong · top 2%
Warranty (yrs)
30
Typical · median 30 yrs

The HiHero+ Bifacial HJT series is a breakthrough solution based on heterojunction technology (HJT), which sets new efficiency standards in the Polish photovoltaics sector. By combining the advantages of crystalline silicon and thin-film technology, these panels eliminate typical energy losses, offering the highest operational stability in all weather conditions. The use of N-type cells makes the modules almost completely resistant to light-induced degradation phenomena, which guarantees above-average long-term durability and real profits after many years of operation. The bifacial design allows for additional energy generation from reflected radiation, which, combined with an exceptionally low temperature coefficient, ensures that the installation maintains high efficiency even on hot summer days. It is an ideal choice for investors requiring maximum yield from limited roof space and for modern ground-mounted farms focusing on innovation. They are distinguished from the competition by unique cell symmetry that minimizes the risk of micro-cracks and maximization of yields in low light, making them exceptionally effective at our latitude. By choosing this solution, the investor receives a premium-class product that effectively solves the problem of power drop at high temperatures, ensuring the highest level of energy security.

Ranking

76 panels in the segment HJT 600-650 W
Metric This panel Median Position in segment Overall rank
Module efficiency 23.90% 22.60% Strong · top 3% 351
Power density 238.8 225.8 Strong · top 1% 356
Temperature coefficient -0.240 -0.240 Typical 13
Weight per kWp 50.9 54.7 Strong · top 2% 4,247
Performance warranty 30 yrs 30 yrs Typical 21
Colour key Strong - top 25% Typical - middle 50% Weak - bottom 25%

Signals from the data

8 positive · 1 caution
Best for

Utility-scale, commercial and hot-climate.

Strengths
238.8 watts per square metre

Top 1% of the HJT 600-650 W segment, against a median of 225.8. Ranked 356th in the whole database.

50.9 kg per kWp

Top 2% of the HJT 600-650 W segment, against a median of 54.7. Ranked 4,247th in the whole database.

23.90% module efficiency

Top 3% of the HJT 600-650 W segment, against a median of 22.60%. Ranked 351st in the whole database.

What owners get
Up to 23.9% Efficiency – Segment Leader

The top-tier HiHero+ variant achieves 23.9% efficiency, clearly outperforming direct competitors: Runergy HY-DH156N8 (23.1%), Tongwei TWMND (23.1%), and BYD HALO (22.79%). On an identical roof area, this translates into meaningfully higher annual energy yield without increasing the module count.

Temperature Coefficient of -0.24%/°C

The datasheet-confirmed Pmax temperature coefficient of -0.24%/°C is among the lowest available in commercial bifacial modules as of 2025 (standard PERC: approx. -0.35%/°C; TOPCon: approx. -0.30%/°C). In Poland's climate, where module temperatures regularly exceed 60°C in summer, this advantage translates into several percentage points of additional yield compared to PERC technology at peak season.

Up to 90% Bifaciality – Above-Standard Rear-Side Gain

The manufacturer rates bifaciality at up to 90%, whereas typical standard-class bifacial modules achieve 70–75%. On ground-mounted systems with high-albedo surfaces (gravel, light-colored membranes), this results in a significant, measurable increase in rear-side power generation.

HJT N-Type Technology: No LID or BOILD

Heterojunction (HJT) cells are inherently immune to light-induced degradation (LID) and boron-oxygen light-induced degradation (BOILD), which in PERC technology cause a permanent power loss of 1–3%. First-year degradation is ≤0.35%/year, and the 30-year linear power warranty is made possible precisely by this long-term stability.

BNEF Tier 1 – Manufacturer Bankability

Canadian Solar is listed on the BNEF Tier 1 index (Q1 2026) with an annual production capacity of 61,000 MWp, placing it among the top global manufacturers. Tier 1 status is a prerequisite for project finance on utility-scale PV installations above 1 MW — specifying these modules introduces no bankability risk.

Trade-offs
15-Year Product Warranty vs. 25 Years from Competitors

The HiHero+ series carries a 15-year product warranty covering manufacturing defects, seals, and frames, whereas many premium Tier-1 N-type modules — including BYD, Jinko Neo, and JA DeepBlue 4.0 — offer a standard 25-year product warranty. This gap is particularly relevant for projects with long financing horizons or insurance requirements that mandate a minimum product warranty period.

Notes from the database
  • Efficiency of 23.9% is 1.3pp above the HJT 600-650W median (22.6%)
  • 238.8 W/m² power density - 13.0 W/m² more than HJT 600-650W median (225.8 W/m²), more power per roof area
  • Temperature coefficient of -0.24%/°C matches the HJT 600-650W median
  • Bifacial design (90% factor) captures reflected light - adds 4-14% yield on ground-mount or white roof
  • Ranked #351 out of 14005 panels for efficiency in the database

Specifications

Open datasheet PDF
Nominal power (Pmax) 645 Wp Nameplate at 1000 W/m², 25 °C
Module efficiency 23.90 % Strong Segment median 22.60%
Vmpp · Impp 42.80 V · 15.07 A Operating point at max power
Voc · Isc 50.40 V · 16.13 A Sizes the string length
Max system voltage 1500 V Longer strings than 1000 V modules
Dimensions 2382×1134×30 mm · 2.70 m² of roof
Weight 32.8 kg Strong Strong · top 2%
Cells 132 · HJT Monocrystalline
Bifaciality 90 % Rear output as a share of front
Coefficient Pmax -0.240 %/°C Typical median -0.240 of its segment
Coefficient Voc · Isc -0.230 · 0.050 %/°C
NOCT 41 °C At 800 W/m², 20 °C ambient
Product warranty 15 years Hardware defects only
Performance warranty 30 years Typical median 30 yrs · median 30 yrs
End-of-warranty output 90.3 % Equals 582 W guaranteed
Degradation 1.00 → 0.30 % First year, then annual

Simulations

Live - change any input
Lifetime output & value
30 years at 1200 kWh/kWp/year and €0.50 per kWh
Power in year 30
-
Lifetime energy
-
Energy value
-
With bifacial gain
-

Degradation from this panel's own datasheet figures. No inverter, soiling or shading losses.

Heat losses
-0.240 %/°C against a segment median of -0.240
-
Bifacial gain
Rear gain over light concrete: -
-

Model: bifaciality × albedo × 0.6 view factor. A first-order estimate, not a yield simulation.

Filter these
Size
Panel Power Eff. Temp. Weight Difference
Canadian Solar CS6.2-66HB-645 645 W 23.90% -0.240 32.8 kg You are here
AIKO-A650-MAE72Mw 650 W 25.20% -0.260 27.0 kg Hotter, lighter, +1.3 pp
AIKO-A680-MDE72Mw 680 W 25.20% -0.260 29.0 kg +35 W, lighter, +1.3 pp
AIKO-A675-MDE72Mw 675 W 25.00% -0.260 29.0 kg +30 W, lighter, +1.1 pp
AIKO-A645-MAE72Mw 645 W 25.00% -0.260 27.0 kg Hotter, lighter, +1.1 pp
AIKO-A695-MAE78Dw 695 W 24.90% -0.260 34.5 kg +50 W, hotter, +1.0 pp
AIKO-G670-MCH72Mw 670 W 24.80% -0.260 28.2 kg +25 W, lighter, +0.9 pp
LR7-72HVHF-670M 670 W 24.80% -0.260 28.5 kg +25 W, lighter, +0.9 pp
CS6.2-66TB-600HP 600 W 22.20% -0.290 40.6 kg Hotter, heavier, -1.7 pp
CS6.2-66TB-605HP 605 W 22.40% -0.290 40.6 kg Hotter, heavier, -1.5 pp
CS6.2-66TB-610HP 610 W 22.60% -0.290 40.6 kg Hotter, heavier, -1.3 pp
CS6.2-66TB-615HP 615 W 22.80% -0.290 40.6 kg Hotter, heavier, -1.1 pp
AIKO-A700-MAE78Dw 700 W 25.00% -0.260 34.5 kg +55 W, hotter, +1.1 pp
JKM650-670N-66QL6-BDV (670W class) 670 W 24.80% -0.260 32.5 kg +25 W, hotter, +0.9 pp

Found 1119 panels of the same or similar size to this one, within ±10 mm. See them here Found 1125 panels of the same or similar size to this one, within ±25 mm. See them here Found 1236 panels of the same or similar size to this one, within ±50 mm. See them here Found 1917 panels of the same or similar size to this one, within ±100 mm. See them here

Common questions

6 answered
What warranty does the Canadian Solar HiHero+ Bifacial HJT series carry?
The HiHero+ Bifacial HJT series is backed by a 15-year product warranty and a 30-year power output warranty from the manufacturer. This means that after 30 years of operation, the module is guaranteed to retain at least 87.4% of its original nominal power. This is one of the longest power warranties currently available on the market, making this series particularly attractive for long-term investment projects.
What is HJT technology, and is the premium price of HiHero+ modules justified compared to standard modules?
HJT (Heterojunction Technology) combines a crystalline silicon wafer with amorphous silicon layers, enabling the module to achieve an efficiency of approximately 23% and a temperature coefficient of just -0.24%/°C. In practice, this means minimal power loss on hot days. By comparison, typical PERC modules lose roughly twice as much power for the same temperature rise. The price premium is therefore genuinely justified, especially in installations where every square meter of roof area counts.
Does the Canadian Solar HiHero+ 645 Wp perform well on overcast days typical of the Polish climate?
Yes. HJT technology and n-type cells deliver exceptionally high efficiency under diffuse, low-irradiance conditions. A bifaciality factor of up to 90% means the rear side of the module captures additional radiation reflected from the ground surface even under cloud cover. As a result, the HiHero+ generates proportionally more energy on overcast days than standard monofacial PERC-class modules.
Are bifacial HiHero+ Bifacial panels worth deploying on a pitched roof, or only on ground-mounted systems?
Bifaciality delivers the greatest gains on ground-mounted systems with high-albedo surfaces, but pitched roofs with a light-colored finish or a reflective membrane can also yield rear-side gains of several to more than ten percent. On a typical clay-tile roof the additional yield is smaller; however, the HiHero+'s high 23% efficiency and low temperature coefficient still translate into better overall performance than standard modules, even when only the front side contribution is considered.
Are Canadian Solar HiHero+ modules resistant to microcracks during transportation and installation?
The HiHero+ series uses a symmetrical cell layout that distributes mechanical stress more evenly than conventional designs, reducing the risk of microcracks. HJT cells are manufactured at low process temperatures, which minimizes the thermal stresses introduced during lamination. As a Bloomberg Tier 1 manufacturer, Canadian Solar subjects its modules to rigorous mechanical testing, including snow load resistance up to 5,400 Pa and wind load resistance up to 2,400 Pa.
Is the Canadian Solar HiHero+ Bifacial HJT series still available in Poland?
Yes, the HiHero+ Bifacial HJT series is currently in production and available on the Polish market. Canadian Solar regularly updates this product line, and modules with power ratings up to 645 Wp can be purchased through authorized renewable energy distributors. Before placing an order, it is advisable to confirm the availability of the specific power variant you require, as the highest-wattage configurations may have longer lead times.
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