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Canadian Solar CS6R-420H-AG
Canadian Solar Brand review

CS6R-420H-AG

420 Wp HJT Bifacial
ComparePV verdict

Middle of its segment, modest efficiency

Rank 10,242 of 14,005
Compare panels Datasheet PDF
Power (Wp)
420
Weak · bottom 23%
Efficiency (%)
21.50
Weak · bottom 17%
Density (Wp/m²)
215.1
Weak · bottom 17%
Temp (%/°C)
-0.260
Weak · bottom 23%
Weight (kg)
23.0
Typical · median 23.0 kg
Warranty (yrs)
30
Typical · median 30 yrs

The Canadian Solar HiHero series utilizes groundbreaking HJT heterojunction technology, which redefines efficiency standards in modern photovoltaic systems. Thanks to the unique combination of crystalline silicon with amorphous layers, these modules effectively eliminate the common problem of light-induced degradation and minimize the negative impact of high temperatures on electricity production. This is the optimal solution for investors who expect maximum energy yield from limited roof space, while maintaining the highest aesthetics of the installation. HiHero panels stand out with one of the lowest temperature coefficients on the market, which makes them work extremely efficiently even on the hottest days, when competing products lose their nominal power. The use of advanced N-type cells guarantees users long-term stability of parameters and exceptional durability, which directly translates into a much faster return on investment costs. Unlike traditional modules, this series offers above-average resistance to micro-cracks and mechanical loads, ensuring operational safety throughout the entire warranty period. By choosing HiHero, you are opting for future technology that effectively solves the problem of energy losses in difficult weather conditions, offering innovation and uncompromising reliability for the most demanding residential and business projects.

Ranking

113 panels in the segment HJT 400-450 W
Metric This panel Median Position in segment Overall rank
Module efficiency 21.50% 22.20% Weak · bottom 17% 7,958
Power density 215.1 221.6 Weak · bottom 17% 7,882
Temperature coefficient -0.260 -0.240 Weak · bottom 23% 511
Weight per kWp 54.8 52.4 Typical 9,167
Performance warranty 30 yrs 30 yrs Typical 21
Colour key Strong - top 25% Typical - middle 50% Weak - bottom 25%

Signals from the data

5 positive · 5 caution
Best for

Residential, commercial and hot-climate.

Not ideal for

Tight roof space, roofs where every square metre has to count and hot climates.

Watch-outs
21.50% module efficiency

Bottom 17% of the HJT 400-450 W segment, against a median of 22.20%.

215.1 watts per square metre

Bottom 17% of the HJT 400-450 W segment, against a median of 221.6.

-0.260 %/°C temperature coefficient

Bottom 23% of the HJT 400-450 W segment, against a median of -0.240.

What owners get
Best-in-class temperature coefficient

The Pmax temperature coefficient is -0.26%/°C, compared to -0.34%/°C for standard PERC modules and -0.29 to -0.30%/°C for TOPCon. This translates to real-world power losses approximately 20–23% lower at a cell temperature of 75°C — an advantage that, under Polish summer conditions, can yield an additional 3–5% in annual energy output relative to PERC technology.

Module efficiency up to 22.8%

The series outperforms all three peer comparables — SunEvo SE6-46SC (21.4%), Solitek SOLRIF D Satin (22.06%), and Q-Cells Q.TRON BLACK (22.3%) — making HiHero the highest-efficiency series in the comparison and enabling greater power output from the same roof area.

No LID/LeTID and degradation ≤0.35%/year

HJT N-type cells exhibit no light-induced degradation (LID) or light and elevated temperature degradation (LeTID). Annual degradation after the first year is ≤0.35%, versus a typical ≤0.40–0.45% for TOPCon modules — meaning approximately 89.8% of rated power is retained after 30 years, assuming a linear degradation curve.

Bifacial design with a 30-year power warranty

Dual-side energy harvesting delivers an estimated bifacial gain of 5–15%, depending on ground albedo (light gravel, EPDM membrane). Combined with a 30-year linear power warranty, the series stands apart from all peer comparables — none of the compared models simultaneously offer bifacial capability and warranty coverage of this length.

BNEF Tier-1 manufacturer, 61,000 MW/year capacity

Canadian Solar has maintained bankable Tier-1 BloombergNEF status continuously for many years and appears on the Q1 2026 list, with an annual manufacturing capacity of approximately 61,000 MW. This substantially reduces the risk of manufacturer warranty default over a long operational lifetime.

Trade-offs
HJT premium pricing vs. TOPCon

At the wholesale level, HJT modules are priced at approximately $0.14–0.16/W versus $0.11–0.13/W for TOPCon — a premium of roughly 15–30%. For a typical 10 kWp residential system, the cost difference relative to comparable Tier-1 TOPCon modules is approximately $700–1,500, extending the simple payback period by roughly 0.5–1 year under Polish irradiation conditions.

15-year product warranty

The stated product warranty is 15 years, while select premium manufacturers — such as REC Alpha Pure-R (25 years) and Q-Cells Q.TRON BLACK (25 years) — offer substantially longer coverage against material and workmanship defects. For installations on hard-to-access industrial rooftops, this shortens the window of full service protection.

Notes from the database
  • At 21.5% efficiency, this panel is 0.7pp below the HJT 400-450W median of 22.2%
  • At 215.1 W/m², this panel generates 6.5 W/m² less per unit area than HJT 400-450W median (221.6 W/m²)
  • At -0.26%/°C, loses 0.02pp more power per degree than HJT 400-450W median (-0.24%/°C)
  • In the top 57% for efficiency among all HJT panels

Specifications

Open datasheet PDF
Nominal power (Pmax) 420 Wp Nameplate at 1000 W/m², 25 °C
Module efficiency 21.50 % Weak Segment median 22.20%
Vmpp · Impp 33.70 V · 12.48 A Operating point at max power
Voc · Isc 40.10 V · 13.28 A Sizes the string length
Max system voltage 1500 V Longer strings than 1000 V modules
Dimensions 1722×1134×30 mm · 1.95 m² of roof
Weight 23.0 kg Typical Typical · median 23.0 kg
Cells 108 · HJT Monocrystalline
Coefficient Pmax -0.260 %/°C Weak bottom 23% of its segment
Coefficient Voc · Isc -0.240 · 0.040 %/°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 88.8 % Equals 373 W guaranteed
Degradation 1.00 → 0.35 % 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
-

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

Heat losses
-0.260 %/°C against a segment median of -0.240
-
Filter these
Size
Panel Power Eff. Temp. Weight Difference
Canadian Solar CS6R-420H-AG 420 W 21.50% -0.260 23.0 kg You are here
JST-EDMH-(445-465)W-TD (465W class) 465 W 23.81% -0.300 20.5 kg +45 W, hotter, +2.3 pp
LX-465M/182R-96+ GG 465 W 23.80% -0.260 23.5 kg +45 W, +2.3 pp
SPR-MAX7-470 470 W 23.70% -0.270 21.1 kg +50 W, +2.2 pp, +10 yr warranty
AIKO-A470-MAH54Mb 470 W 23.60% -0.260 21.5 kg +50 W, lighter, +2.1 pp
AIKO-A460-MAH54Mb 460 W 23.60% -0.290 20.5 kg +40 W, hotter, +2.1 pp
HSM-BD54-LA470 470 W 23.60% -0.260 21.5 kg +50 W, lighter, +2.1 pp
CS6R-395MS 395 W 20.20% -0.340 21.3 kg Hotter, -1.3 pp, -5 yr warranty
CS6R-400MS 400 W 20.50% -0.340 21.3 kg Hotter, -1.0 pp, -5 yr warranty
CS6R-405MS 405 W 20.70% -0.340 21.3 kg Hotter, -0.8 pp, -5 yr warranty
CS6R-410MS 410 W 21.00% -0.340 21.3 kg Hotter, -0.5 pp, -5 yr warranty
CS6R-415MS 415 W 21.30% -0.340 21.3 kg Hotter, lighter, -5 yr warranty
CS6R-425T 425 W 21.80% -0.290 21.3 kg Hotter, lighter, +0.3 pp
CS6R-430T 430 W 22.00% -0.290 21.3 kg Hotter, lighter, +0.5 pp
LR7-54HJD-510M 510 W 25.00% -0.240 23.5 kg +90 W, cooler, +3.5 pp
AIKO-A495-MCE54Mw 495 W 24.80% -0.260 21.0 kg +75 W, lighter, +3.3 pp
LR7-54HJD-505M 505 W 24.70% -0.240 23.5 kg +85 W, cooler, +3.2 pp

Found 1783 panels of the same or similar size to this one, within ±10 mm. See them here Found 1914 panels of the same or similar size to this one, within ±25 mm. See them here Found 3392 panels of the same or similar size to this one, within ±50 mm. See them here Found 3970 panels of the same or similar size to this one, within ±100 mm. See them here

Common questions

6 answered
What is the HJT technology used in Canadian Solar HiHero panels, and does it genuinely differ from conventional solar panels?
Yes, the difference is significant. HJT (heterojunction) technology combines a crystalline N-type silicon cell with thin layers of amorphous silicon. The result is higher conversion efficiency, a very low temperature coefficient (approximately -0.26%/°C), and virtually zero light-induced degradation (LID). In practice, this translates to greater energy output throughout the year — particularly during summer months and on overcast days — compared to standard monocrystalline PERC modules.
What warranty does the Canadian Solar HiHero series carry, and what exactly does it cover?
The HiHero series comes with a 15-year product warranty covering materials and workmanship, as well as a 30-year linear power output warranty. The power warranty guarantees that after 30 years the panel will retain at least 87.4% of its nominal power output, with annual degradation not exceeding 0.35% after the first year. This represents one of the strongest warranty offerings available in the premium panel segment on the market.
Does the Canadian Solar HiHero 445W panel perform efficiently during summer when temperatures are extremely high?
Yes, and this is one of the key advantages of the HiHero series. Thanks to HJT technology, the temperature coefficient is approximately -0.24 to -0.26%/°C, whereas typical PERC panels exhibit -0.35%/°C or higher. At a cell temperature of 70°C, the HiHero loses approximately 12% of its nominal power output, while a PERC panel loses more than 17%. During hot Polish summers, this difference translates directly into measurable additional kilowatt-hours on the energy bill.
What does it mean that the HiHero panel is bifacial, and how much additional energy can be harvested from the rear side?
Bifacial means the panel generates power from both sides. The rear side of the HiHero achieves a bifaciality factor of up to approximately 95%, which in practice means that with favorable ground albedo — such as light-colored gravel, white roofing membrane, or snow — the module can generate 5–15% more energy than its nominal power rating suggests. This gain is, however, strongly dependent on the tilt angle and the reflectivity of the surface beneath the installation.
Are Canadian Solar HiHero panels suitable for a small roof where maximizing power output per unit area is a priority?
Yes, the HiHero series is one of the better solutions for space-constrained roof installations. The 445 Wp module achieves an efficiency in the range of 21–22%, placing it among the top-performing products on the market. This translates to more kilowatts from the same number of square meters compared to lower-cost models. For an installer or homeowner with limited roof space, the difference between HJT and standard PERC technology can amount to fitting one additional panel within the same footprint.
Is Canadian Solar a reliable manufacturer, and can the company be trusted when purchasing HiHero panels?
Canadian Solar is a Tier-1 manufacturer according to BNEF rankings, headquartered in Canada with production facilities on a global scale. Its presence in Poland is confirmed by numerous distributors, and the company consistently appears in rankings of the largest and most financially stable photovoltaic module manufacturers. Warranties are issued directly by the manufacturer, which is a material consideration for investment security given a 30-year power output commitment.
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