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MST12665HP3G vs MST12R620HN3G 4 of 18 identical Swap Change panels

Mission Solar MST12665HP3G vs Mission Solar MST12R620HN3G

Mission Solar
MST12665HP3G
665 Wp 21.40 % PERC Bifacial
Open panel page Datasheet PDF
VS
Mission Solar
MST12R620HN3G
620 Wp 23.00 % N-type Bifacial
Open panel page Datasheet PDF
The verdict

MST12R620HN3G leads on the differences that matter

The largest is module efficiency: 1.60 pp more efficient. 4 of 18 comparable parameters are identical, with 1 more left out because at least one datasheet does not publish it.

See all 14 differences
How alike are they
4 of 18 comparable
parameters are identical
identical differs not published
01

What actually differs

14 of 18 parameters
Parameter MST12665HP3G MST12R620HN3G Difference
Module efficiency 21.40 % 23.00 % 1.60 pp more efficient
Temperature coefficient -0.340 %/°C -0.290 %/°C 0.050 %/°C better in heat
Rated power 665 Wp 620 Wp 45 W more power
Power density 214.1 Wp/m² 229.5 Wp/m² 15.5 Wp/m² higher
Weight 38.7 kg 33.0 kg 5.7 kg lighter
Short-circuit current 18.50 A 16.26 A 2.24 A apart
Module area 3.106 m² 2.701 m² 0.405 m² apart
Weight per kWp 58.2 kg/kWp 53.2 kg/kWp 5.0 kg/kWp lighter
Cell technology PERC N-type PERC vs N-type
Open-circuit voltage 46.10 V 48.50 V 2.40 V apart
Annual degradation 0.45 %/yr 0.40 %/yr 0.05 %/yr slower
Current at max power 17.39 A 15.41 A 1.98 A apart
Dimensions 2384x1303x35 mm 2382x1134x30 mm 2384x1303x35 mm vs 2382x1134x30 mm
Voltage at max power 38.30 V 40.24 V 1.94 V apart
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
MST12665HP3G
21,899 kWh
MST12R620HN3G
20,802 kWh
Lifetime gap
1,097 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario MST12665HP3G MST12R620HN3G
Standard test conditions 25 °C 100.0% of rated power 665 W 620 W
Cool, bright day 40 °C 94.9% of rated power 631 W 593 W
Typical summer roof 55 °C 89.8% of rated power 597 W 566 W
Hot roof 70 °C 84.7% of rated power 563 W 539 W
03

Full specification

Parameter MST12665HP3G MST12R620HN3G Difference
Power and efficiency
Rated power 665 Wp 620 Wp +45 W for MST12665HP3G
Module efficiency 21.40 % 23.00 % +1.60 pp for MST12R620HN3G
Power density 214.1 Wp/m² 229.5 Wp/m² +15.5 Wp/m² for MST12R620HN3G
Open-circuit voltage 46.10 V 48.50 V 2.40 V apart
Voltage at max power 38.30 V 40.24 V 1.94 V apart
Short-circuit current 18.50 A 16.26 A 2.24 A apart
Current at max power 17.39 A 15.41 A 1.98 A apart
Temperature
Temperature coefficient -0.340 %/°C -0.290 %/°C +0.050 %/°C for MST12R620HN3G
Mechanical
Dimensions 2384x1303x35 mm 2382x1134x30 mm 2384x1303x35 mm vs 2382x1134x30 mm
Module area 3.106 m² 2.701 m² 0.405 m² apart
Weight 38.7 kg 33.0 kg -5.7 kg for MST12R620HN3G
Weight per kWp 58.2 kg/kWp 53.2 kg/kWp -5.0 kg/kWp for MST12R620HN3G
Warranty and degradation
Product warranty - - Neither datasheet publishes this
Performance warranty 30 yrs 30 yrs Same
Annual degradation 0.45 %/yr 0.40 %/yr -0.05 %/yr for MST12R620HN3G
Technology
Cell technology PERC N-type PERC vs N-type
Cell type Monocrystalline Monocrystalline Same
Cell count 132 132 Same
Bifacial Yes Yes Same
04

Against the whole database

14,129 panels
Efficiency
#8,388 vs #1,970
MST12R620HN3G leads by 6,418 places
Power density
#8,315 vs #2,243
MST12R620HN3G leads by 6,072 places
Heat behaviour
#8,846 vs #2,220
MST12R620HN3G leads by 6,626 places
Weight
#11,709 vs #7,129
MST12R620HN3G leads by 4,580 places
Warranty
#21 vs #21
Tied - the same position in the database
Overall
#5,332 vs #5,028
MST12R620HN3G leads by 304 places
05

More useful comparisons

Open the full database
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Mission Solar MST12665HP3G vs Mission Solar MST12660HP3G
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Mission Solar MST12R620HN3G vs Mission Solar MST12R615HN3G
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Mission Solar MST12665HP3G vs Mission Solar MSH10-595HN4G
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15 differences, the largest is module efficiency
06

Written summary

07

Questions about this pairing

Which panel is better: Mission Solar MST12665HP3G or Mission Solar MST12R620HN3G?
According to our database: Mission Solar MST12R620HN3G has higher module efficiency (23.00% vs 21.40%); Mission Solar MST12R620HN3G tolerates heat better (temp coeff -0.290%/°C vs -0.340%/°C). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of Mission Solar MST12665HP3G and Mission Solar MST12R620HN3G?
Mission Solar MST12665HP3G has a module efficiency of 21.40%, while Mission Solar MST12R620HN3G is 23.00%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does Mission Solar MST12665HP3G use vs Mission Solar MST12R620HN3G?
Mission Solar MST12665HP3G uses PERC cells; Mission Solar MST12R620HN3G uses N-type. 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 Mission Solar MST12665HP3G and Mission Solar MST12R620HN3G?
Mission Solar MST12665HP3G has a 30 years power warranty; Mission Solar MST12R620HN3G has a 30 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.
Are Mission Solar MST12665HP3G and Mission Solar MST12R620HN3G bifacial panels?
Both Mission Solar MST12665HP3G and Mission Solar MST12R620HN3G are bifacial - they capture reflected light from the ground, which can add 5-15% more annual energy on ground-mount or elevated rooftop installations with a light surface beneath.

Shop prices: See 4 Mission 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.