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MSI10-585HN4G vs MST12660HP3G 3 of 18 identical Swap Change panels

Mission Solar MSI10-585HN4G vs Mission Solar MST12660HP3G

Mission Solar
MSI10-585HN4G
585 Wp 22.67 % TOPCon Bifacial
Open panel page Datasheet PDF
VS
Mission Solar
MST12660HP3G
660 Wp 21.20 % PERC Bifacial
Open panel page Datasheet PDF
The verdict

MSI10-585HN4G leads on the differences that matter

The largest is module efficiency: 1.47 pp more efficient. 3 of 18 comparable parameters are identical, with 1 more left out because at least one datasheet does not publish it.

See all 15 differences
How alike are they
3 of 18 comparable
parameters are identical
identical differs not published
01

What actually differs

15 of 18 parameters
Parameter MSI10-585HN4G MST12660HP3G Difference
Module efficiency 22.67 % 21.20 % 1.47 pp more efficient
Temperature coefficient -0.298 %/°C -0.340 %/°C 0.042 %/°C better in heat
Rated power 585 Wp 660 Wp 75 W more power
Power density 226.5 Wp/m² 212.5 Wp/m² 14.0 Wp/m² higher
Weight 32.2 kg 38.7 kg 6.5 kg lighter
Open-circuit voltage 52.70 V 45.90 V 6.80 V apart
Short-circuit current 14.05 A 18.45 A 4.40 A apart
Module area 2.583 m² 3.106 m² 0.523 m² apart
Weight per kWp 55.0 kg/kWp 58.6 kg/kWp 3.6 kg/kWp lighter
Cell technology TOPCon PERC TOPCon vs PERC
Voltage at max power 44.04 V 38.10 V 5.94 V apart
Current at max power 13.30 A 17.35 A 4.05 A apart
Cell count 144 132 12 cells apart
Annual degradation 0.40 %/yr 0.45 %/yr 0.05 %/yr slower
Dimensions 2278x1134x30 mm 2384x1303x35 mm 2278x1134x30 mm vs 2384x1303x35 mm
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
MSI10-585HN4G
19,628 kWh
MST12660HP3G
21,734 kWh
Lifetime gap
2,106 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario MSI10-585HN4G MST12660HP3G
Standard test conditions 25 °C 100.0% of rated power 585 W 660 W
Cool, bright day 40 °C 94.9% of rated power 559 W 626 W
Typical summer roof 55 °C 89.8% of rated power 533 W 593 W
Hot roof 70 °C 84.7% of rated power 507 W 559 W
03

Full specification

Parameter MSI10-585HN4G MST12660HP3G Difference
Power and efficiency
Rated power 585 Wp 660 Wp +75 W for MST12660HP3G
Module efficiency 22.67 % 21.20 % +1.47 pp for MSI10-585HN4G
Power density 226.5 Wp/m² 212.5 Wp/m² +14.0 Wp/m² for MSI10-585HN4G
Open-circuit voltage 52.70 V 45.90 V 6.80 V apart
Voltage at max power 44.04 V 38.10 V 5.94 V apart
Short-circuit current 14.05 A 18.45 A 4.40 A apart
Current at max power 13.30 A 17.35 A 4.05 A apart
Temperature
Temperature coefficient -0.298 %/°C -0.340 %/°C +0.042 %/°C for MSI10-585HN4G
Mechanical
Dimensions 2278x1134x30 mm 2384x1303x35 mm 2278x1134x30 mm vs 2384x1303x35 mm
Module area 2.583 m² 3.106 m² 0.523 m² apart
Weight 32.2 kg 38.7 kg -6.5 kg for MSI10-585HN4G
Weight per kWp 55.0 kg/kWp 58.6 kg/kWp -3.6 kg/kWp for MSI10-585HN4G
Warranty and degradation
Product warranty 12 yrs - Not published by Mission Solar
Performance warranty 30 yrs 30 yrs Same
Annual degradation 0.40 %/yr 0.45 %/yr -0.05 %/yr for MSI10-585HN4G
Technology
Cell technology TOPCon PERC TOPCon vs PERC
Cell type Monocrystalline Monocrystalline Same
Cell count 144 132 12 cells apart
Bifacial Yes Yes Same
04

Against the whole database

14,129 panels
Efficiency
#3,563 vs #9,145
MSI10-585HN4G leads by 5,582 places
Power density
#3,557 vs #9,028
MSI10-585HN4G leads by 5,471 places
Heat behaviour
#6,149 vs #8,846
MSI10-585HN4G leads by 2,697 places
Weight
#9,512 vs #11,906
MSI10-585HN4G leads by 2,394 places
Warranty
#21 vs #21
Tied - the same position in the database
Overall
#4,131 vs #5,713
MSI10-585HN4G leads by 1,582 places
05

More useful comparisons

Open the full database
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06

Written summary

07

Questions about this pairing

Which panel is better: Mission Solar MSI10-585HN4G or Mission Solar MST12660HP3G?
According to our database: Mission Solar MSI10-585HN4G has higher module efficiency (22.67% vs 21.20%); Mission Solar MSI10-585HN4G tolerates heat better (temp coeff -0.298%/°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 MSI10-585HN4G and Mission Solar MST12660HP3G?
Mission Solar MSI10-585HN4G has a module efficiency of 22.67%, while Mission Solar MST12660HP3G is 21.20%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does Mission Solar MSI10-585HN4G use vs Mission Solar MST12660HP3G?
Mission Solar MSI10-585HN4G uses TOPCon cells; Mission Solar MST12660HP3G 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 Mission Solar MSI10-585HN4G and Mission Solar MST12660HP3G?
Mission Solar MSI10-585HN4G has a 30 years power warranty; Mission Solar MST12660HP3G 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 MSI10-585HN4G and Mission Solar MST12660HP3G bifacial panels?
Both Mission Solar MSI10-585HN4G and Mission Solar MST12660HP3G 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.