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645MS vs 650MS 19 of 19 identical Swap Change panels

Canadian Solar CS7N-645MS vs Canadian Solar CS7N-650MS

Canadian Solar CS7N-645MS
CS7N-645MS
645 Wp 20.80 % PERC
Open panel page Datasheet PDF
VS
Canadian Solar CS7N-650MS
CS7N-650MS
650 Wp 20.90 % PERC
Open panel page Datasheet PDF
The verdict

Identical on every published parameter

All 19 comparable parameters agree. Two records this alike are usually one panel sold under two names, or two bins of the same production line - decide on price and on who you would rather buy from.

How alike are they
19 of 19 comparable
parameters are identical
identical differs
01

What actually differs

0 of 19 parameters

Every comparable parameter agrees. The full specification is below.

02

What it means on a roof

Thirty years of production
Each panel's own declared degradation curve, at 1,200 kWh/kWp a year
Same temp coeff. for both panels (-0.340 %/°C), so a warmer roof scales both curves by the same factor: the totals fall together and neither panel gains on the other.
645MS
20,904 kWh
650MS
21,066 kWh
Lifetime gap
162 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario 645MS 650MS
Standard test conditions 25 °C 100.0% of rated power 645 W 650 W
Cool, bright day 40 °C 94.9% of rated power 612 W 617 W
Typical summer roof 55 °C 89.8% of rated power 579 W 584 W
Hot roof 70 °C 84.7% of rated power 546 W 551 W
03

Full specification

Parameter 645MS 650MS Difference
Power and efficiency
Rated power 645 Wp 650 Wp Effectively the same
Module efficiency 20.80 % 20.90 % Effectively the same
Power density 207.6 Wp/m² 209.2 Wp/m² Effectively the same
Open-circuit voltage 44.80 V 45.00 V Effectively the same
Voltage at max power 37.70 V 37.90 V Effectively the same
Short-circuit current 18.35 A 18.39 A Effectively the same
Current at max power 17.11 A 17.16 A Effectively the same
Temperature
Temperature coefficient -0.340 %/°C -0.340 %/°C Same
Mechanical
Dimensions 2384x1303x35 mm 2384x1303x35 mm Same
Module area 3.106 m² 3.106 m² Same
Weight 33.9 kg 33.9 kg Same
Weight per kWp 52.6 kg/kWp 52.2 kg/kWp Effectively the same
Warranty and degradation
Product warranty 12 yrs 12 yrs Same
Performance warranty 25 yrs 25 yrs Same
Annual degradation 0.55 %/yr 0.55 %/yr Same
Technology
Cell technology PERC PERC Same
Cell type Monocrystalline Monocrystalline Same
Cell count 132 132 Same
Bifacial No No Same
04

Against the whole database

14,005 panels
Efficiency
#10,457 vs #10,072
650MS leads by 385 places
Power density
#10,562 vs #10,011
650MS leads by 551 places
Heat behaviour
#8,778 vs #8,778
Tied - the same position in the database
Weight
#6,185 vs #5,614
650MS leads by 571 places
Warranty
#9,798 vs #9,798
Tied - the same position in the database
Overall
#5,161 vs #4,886
650MS leads by 275 places
05

More useful comparisons

Open the full database
Same series, other bin
Canadian Solar CS7N-645MS vs Canadian Solar CS7N-675MS
6 differences, the largest is module efficiency
Same series, other bin
Canadian Solar CS7N-645MS vs Canadian Solar CS7N-670MS
5 differences, the largest is module efficiency
Same series, other bin
Canadian Solar CS7N-645MS vs Canadian Solar CS7N-665MS
3 differences, the largest is module efficiency
Same series, other bin
Canadian Solar CS7N-645MS vs Canadian Solar CS7N-660MS
3 differences, the largest is module efficiency
Same series, other bin
Canadian Solar CS7N-645MS vs Canadian Solar CS7N-655MS
3 differences, the largest is module efficiency
Same series, other bin
Canadian Solar CS7N-645MS vs Canadian Solar CS7L-615MS
10 differences, the largest is module efficiency
06

Written summary

07

Questions about this pairing

Which panel is better: Canadian Solar CS7N-645MS or Canadian Solar CS7N-650MS?
According to our database: Canadian Solar CS7N-650MS has higher module efficiency (20.90% vs 20.80%). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of Canadian Solar CS7N-645MS and Canadian Solar CS7N-650MS?
Canadian Solar CS7N-645MS has a module efficiency of 20.80%, while Canadian Solar CS7N-650MS is 20.90%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does Canadian Solar CS7N-645MS use vs Canadian Solar CS7N-650MS?
Canadian Solar CS7N-645MS uses PERC cells; Canadian Solar CS7N-650MS uses PERC. Modern n-type technologies (TOPCon, HJT, BC) typically deliver higher efficiency and lower degradation compared to older PERC (p-type) cells.
What is the warranty on Canadian Solar CS7N-645MS and Canadian Solar CS7N-650MS?
Canadian Solar CS7N-645MS has a 25 years power warranty; Canadian Solar CS7N-650MS has a 25 years power warranty. The power warranty guarantees a minimum percentage of rated output at the end of the warranty period (typically 80-87%). Product (materials) warranties are usually shorter.

Shop prices: See 39 Canadian Solar offers

Every figure here is from the manufacturers' own datasheets - a dash means the value is not published, never an estimate. The thirty-year projection and the temperature scenarios are calculations from those figures, and each states its assumption above.