Skip to main content
Canadian Solar Brand review

CS3U-390MS-AG

390 Wp PERC
ComparePV verdict

Warranty pick, heavy for its output

Rank 12,357 of 14,129
Compare panels Datasheet PDF
Power (Wp)
390
Typical for its class
Efficiency (%)
19.70
Typical · median 19.90%
Density (Wp/m²)
196.6
Typical · median 199.0
Temp (%/°C)
-0.360
Typical · median -0.350
Weight (kg)
26.5
Weak · 5.1 kg above median
Warranty (yrs)
30
Strong · top 13%

The KuDymond CS3U-MS-AG series consists of mono-crystalline PERC modules built with multi-busbar (MBB) cell technology, engineered for installations facing demanding weather conditions. By splitting cells into segments and improving current-path connections, the module maintains strong output even under partial shading, meaningfully cutting energy losses in real-world operating conditions rather than just in lab-based STC testing. The frame and cell layout are built to withstand extreme snow and wind loads, making the panel a solid fit for sloped roofs in harsh-winter regions as well as open-field ground-mount installations. A low power temperature coefficient combined with a reduced nominal module operating temperature (NMOT) translates into steadier energy yield during summer, when panels run hottest. The manufacturer places clear emphasis on durability: better shading tolerance, low temperature coefficient, high resistance to snow and wind loads, minimized micro-crack impact, and a 30-year linear power warranty together address the typical pain points of PV installations - degradation, hot spots, and long-term failures. This makes it a solid choice for investors and installers looking for a proven, versatile module for commercial projects and larger residential prosumer systems where long-term reliability matters most.

Ranking

579 panels in the segment PERC 350-400 W
Metric This panel Median Position in segment Overall rank
Module efficiency 19.70% 19.90% Typical 12,596
Power density 196.6 199.0 Typical 12,635
Temperature coefficient -0.360 -0.350 Typical 12,425
Weight per kWp 67.9 55.8 Weak · bottom 7% 13,404
Performance warranty 30 yrs 25 yrs Strong · top 13% 21
Colour key Strong - top 25% Typical - middle 50% Weak - bottom 25%

Signals from the data

6 positive · 4 caution
Best for

Residential, commercial, cold-climate and shaded-installations.

Not ideal for

Weight-limited structures.

Strengths
30 year performance warranty

Top 13% of the PERC 350-400 W segment, against a median of 25 yrs.

Watch-outs
67.9 kg per kWp

Bottom 7% of the PERC 350-400 W segment, against a median of 55.8. Ranked 13,404th in the whole database.

What owners get
Tier-1 manufacturer with 25 years on market

Canadian Solar is a bankable (BNEF Tier-1) manufacturer operating since 2001, providing financial credibility for warranty claims even after a series is discontinued.

30-year linear power warranty

The 30-year power warranty exceeds the standard 25 years offered by many PERC-segment competitors, improving long-term energy yield predictability for investors.

High mechanical resistance to snow and wind loads

The MBB segmented-cell design increases resistance to extreme snow and wind loads, making the module suitable both for pitched roofs in harsh-winter regions and for ground-mounted installations.

Better partial-shading tolerance

Cell segmentation and a denser multi-busbar (MBB) grid reduce energy losses under partial shading in real-world operating conditions, not just under STC testing, translating into a genuinely higher annual yield compared to classic 5BB/9BB PERC modules.

Low power temperature coefficient

A reduced module operating temperature (NMOT) and low power temperature coefficient stabilize energy yield during summer, when panels heat up the most - important for installations on poorly ventilated roof surfaces.

Trade-offs
Production discontinued in 2021

The KuDymond CS3U-MS-AG series was launched in 2019 and discontinued in 2021, meaning limited availability of spare parts and difficulty replacing individual modules in existing installations.

Efficiency below segment leader

The maximum 20.2% efficiency trails the Heliene 108HC M10 SL All Black (20.5% at the same 400 Wp power class), giving a competitor a slightly higher yield on the same roof area.

Older PERC technology, no N-type cells

The module relies solely on PERC (P-type) cells, which compared to newer N-type technologies (TOPCon, HJT) exhibit a higher LID/LeTID degradation rate and lower efficiency at high temperatures.

Notes from the database
  • Efficiency of 19.7% matches the PERC 0-400W median
  • At 196.6 W/m² power density, roof space requirements are typical for PERC 0-400W panels
  • At -0.36%/°C, hot weather performance is typical for PERC 0-400W panels
  • Weight of 26.5 kg is 6.0 kg above PERC 0-400W median (20.5 kg) - verify structural support
  • In the top 89% for efficiency among all PERC panels

Specifications

Open datasheet PDF
Nominal power (Pmax) 390 Wp Nameplate at 1000 W/m², 25 °C
Module efficiency 19.70 % Typical Segment median 19.90%
Vmpp · Impp 40.40 V · 9.66 A Operating point at max power
Voc · Isc 48.20 V · 10.17 A Sizes the string length
Max system voltage 1500 V Longer strings than 1000 V modules
Dimensions 2000×992×35 mm · 1.98 m² of roof
Weight 26.5 kg Weak Weak · 5.1 kg above median
Cells 144 · PERC Monocrystalline
Coefficient Pmax -0.360 %/°C Typical median -0.350 of its segment
Coefficient Voc · Isc -0.290 · 0.050 %/°C
NOCT 42 °C At 800 W/m², 20 °C ambient
Product warranty 12 years Hardware defects only
Performance warranty 30 years Strong top 13% · median 25 yrs

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
-0.360 %/°C against a segment median of -0.350
-
Filter these
Size
Panel Power Eff. Temp. Weight Difference
Canadian Solar CS3U-390MS-AG 390 W 19.70% -0.360 26.5 kg You are here
LX-440M/182-108+GG 440 W 23.07% -0.240 23.6 kg +50 W, cooler, +3.4 pp
GKA210M340W 340 W 23.00% - 16.2 kg -50 W, lighter, +3.3 pp
GKA210M360W 360 W 23.00% - 16.2 kg -30 W, lighter, +3.3 pp
GKA210M380W (1/4*4*38) 380 W 23.00% - 17.1 kg -10 W, lighter, +3.3 pp
GKA210M400W (1/2*4*20) 400 W 23.00% - 18.0 kg +10 W, lighter, +3.3 pp
GKA210M400W (1/4*4*40) 400 W 23.00% - 18.0 kg +10 W, lighter, +3.3 pp
GKA210M380W (1/2*4*19) 380 W 23.00% - 17.1 kg -10 W, lighter, +3.3 pp
JT440SYK(B) 440 W 22.90% -0.240 23.0 kg +50 W, cooler, +3.2 pp
CS3U-355P 355 W 17.90% -0.360 22.5 kg Lighter, -1.8 pp, -5 yr warranty
CS3U-360P 360 W 18.20% -0.360 22.5 kg Lighter, -1.5 pp, -5 yr warranty
CS3U-365P 365 W 18.40% -0.360 22.5 kg Lighter, -1.3 pp, -5 yr warranty
CS3U-370P 370 W 18.70% -0.360 22.5 kg Lighter, -1.0 pp, -5 yr warranty
CS3U-375P 375 W 18.90% -0.360 22.5 kg Lighter, -0.8 pp, -5 yr warranty
SPR-MAX7-475 475 W 24.00% -0.270 21.1 kg Cooler, +4.3 pp, +10 yr warranty
SPR-MAX7-470 470 W 23.70% -0.270 21.1 kg Cooler, +4.0 pp, +10 yr warranty
SPR-MAX7-465 465 W 23.50% -0.270 21.1 kg Cooler, +3.8 pp, +10 yr warranty

Found 130 panels of the same or similar size to this one, within ±10 mm. See them here Found 271 panels of the same or similar size to this one, within ±25 mm. See them here Found 470 panels of the same or similar size to this one, within ±50 mm. See them here Found 734 panels of the same or similar size to this one, within ±100 mm. See them here

About the KuDymond CS3U-MS-AG series

6 answered

These answers cover the whole series. Where a figure differs, the specification above is this module's own.

Is the Canadian Solar KuDymond CS3U-MS-AG series still available for purchase?
The CS3U-MS-AG series has been discontinued from the manufacturer's current lineup and replaced by newer TOPCon-based models. Panels may still be available through distributors as remaining stock or on the secondary market. It's worth asking the seller about the production date and confirming whether the manufacturer's warranty still applies despite the discontinued status.
What warranty comes with the CS3U-MS-AG panels and does it cover power degradation?
The manufacturer provides a 12-year product warranty and a 30-year linear power output warranty. This means the panel should retain a significant portion of its rated power after 30 years, with degradation spread evenly over time rather than dropping sharply. This is one of the longer warranty periods offered by Tier 1 manufacturers.
How does the MBB technology in the CS3U-MS-AG differ from panels with fewer busbars?
The multi-busbar (MBB) technology used in the KuDymond series increases the density of current-carrying paths across the PERC cell surface. This gives current more routes to flow, reducing losses from microcracks and partial shading. In practice, the panel maintains higher efficiency in real-world operating conditions, not just in laboratory STC tests.
Are the KuDymond CS3U-MS-AG panels suitable for installations in regions with heavy snow loads?
Yes, this series was engineered to withstand extreme mechanical loads, including snow and wind. Thanks to its reinforced frame, the panels perform well both on pitched roofs in regions with harsh winters and in open ground-mounted installations exposed to strong wind gusts.
What is the maximum power output of the CS3U-MS-AG module and what installations is it suited for?
The panels reach a maximum power output of up to 400 Wp using monocrystalline PERC cells. This power rating makes them a versatile choice for both larger residential prosumer installations and commercial projects, where power-to-area ratio and long-term reliability, backed by a 30-year power warranty, matter most.
How well do Canadian Solar KuDymond panels handle heat and high operating temperatures?
Yes, this series features a low power temperature coefficient and a reduced Nominal Module Operating Temperature (NMOT). This results in a smaller efficiency drop during hot weather compared to standard panels, translating into more stable energy yield in summer, when solar irradiance and ambient temperature are at their highest.
Add to compare