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410/MR vs 420/MR 16 of 19 identical Swap Change panels

JA Solar JAM54S30-410/MR vs JA Solar JAM54S30-420/MR

JA Solar JAM54S30-410/MR
JAM54S30-410/MR
410 Wp 21.00 % PERC
Open panel page Datasheet PDF
VS
JA Solar JAM54S30-420/MR
JAM54S30-420/MR
420 Wp 21.50 % PERC
Open panel page Datasheet PDF
The verdict

420/MR leads on the differences that matter

The largest is module efficiency: 0.50 pp more efficient. 16 of 19 comparable parameters are identical.

See all 3 differences
How alike are they
16 of 19 comparable
parameters are identical
identical differs
01

What actually differs

3 of 19 parameters
Parameter 410/MR 420/MR Difference
Module efficiency 21.00 % 21.50 % 0.50 pp more efficient
Power density 210.0 Wp/m² 215.1 Wp/m² 5.1 Wp/m² higher
Rated power 410 Wp 420 Wp 10 W more power
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 (-0.350 %/°C), so a warmer roof scales both curves by the same factor: the totals fall together and neither panel gains on the other.
410/MR
13,288 kWh
420/MR
13,612 kWh
Lifetime gap
324 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario 410/MR 420/MR
Standard test conditions 25 °C 100.0% of rated power 410 W 420 W
Cool, bright day 40 °C 94.8% of rated power 388 W 398 W
Typical summer roof 55 °C 89.5% of rated power 367 W 376 W
Hot roof 70 °C 84.2% of rated power 345 W 354 W
03

Full specification

Parameter 410/MR 420/MR Difference
Power and efficiency
Rated power 410 Wp 420 Wp +10 W for 420/MR
Module efficiency 21.00 % 21.50 % +0.50 pp for 420/MR
Power density 210.0 Wp/m² 215.1 Wp/m² +5.1 Wp/m² for 420/MR
Open-circuit voltage 37.32 V 37.58 V Effectively the same
Voltage at max power 31.45 V 31.80 V Effectively the same
Short-circuit current 13.95 A 14.10 A Effectively the same
Current at max power 13.04 A 13.21 A Effectively the same
Temperature
Temperature coefficient -0.350 %/°C -0.350 %/°C Same
Mechanical
Dimensions 1722x1134x30 mm 1722x1134x30 mm Same
Module area 1.953 m² 1.953 m² Same
Weight 19.5 kg 19.5 kg Same
Weight per kWp 47.6 kg/kWp 46.4 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 108 108 Same
Bifacial No No Same
04

Against the whole database

14,005 panels
Efficiency
#9,758 vs #7,958
420/MR leads by 1,800 places
Power density
#9,772 vs #7,882
420/MR leads by 1,890 places
Heat behaviour
#10,419 vs #10,419
Tied - the same position in the database
Weight
#1,755 vs #1,155
420/MR leads by 600 places
Warranty
#9,798 vs #9,798
Tied - the same position in the database
Overall
#11,631 vs #11,103
420/MR leads by 528 places
05

More useful comparisons

Open the full database
Same series, other bin
JA Solar JAM54S30-410/MR vs JA Solar JAM54S30-415/MR
One difference: module efficiency
Same series, other bin
JA Solar JAM54S30-410/MR vs JA Solar JAM54S30-405/MR
One difference: module efficiency
Same series, other bin
JA Solar JAM54S30-410/MR vs JA Solar JAM54S30-400/MR
3 differences, the largest is module efficiency
Same series, other bin
JA Solar JAM54S30-410/MR vs JA Solar JAM54S30-395/MR
3 differences, the largest is module efficiency
Same series, other bin
JA Solar JAM54S30-410/MR vs JA Solar JAM54S30-390/MR
4 differences, the largest is module efficiency
Same series, other bin
JA Solar JAM54S30-420/MR vs JA Solar JAM54S30-425/MR
One difference: module efficiency
06

Written summary

07

Questions about this pairing

Which panel is better: JA Solar JAM54S30-410/MR or JA Solar JAM54S30-420/MR?
According to our database: JA Solar JAM54S30-420/MR has higher module efficiency (21.50% vs 21.00%). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of JA Solar JAM54S30-410/MR and JA Solar JAM54S30-420/MR?
JA Solar JAM54S30-410/MR has a module efficiency of 21.00%, while JA Solar JAM54S30-420/MR is 21.50%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does JA Solar JAM54S30-410/MR use vs JA Solar JAM54S30-420/MR?
JA Solar JAM54S30-410/MR uses PERC cells; JA Solar JAM54S30-420/MR 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 JA Solar JAM54S30-410/MR and JA Solar JAM54S30-420/MR?
JA Solar JAM54S30-410/MR has a 25 years power warranty; JA Solar JAM54S30-420/MR 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 341 JA 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.