580/MR vs 595/MR 16 of 19 identical Swap Change panels

JA Solar JAM78S30-580/MR vs JA Solar JAM78S30-595/MR

Q: Which panel is better: JA Solar JAM78S30-580/MR or JA Solar JAM78S30-595/MR?

According to our database: JA Solar JAM78S30-595/MR has higher module efficiency (21.30% vs 20.70%). See the full spec comparison and 30-year energy simulation above for a complete picture.

Q: What is the efficiency of JA Solar JAM78S30-580/MR and JA Solar JAM78S30-595/MR?

JA Solar JAM78S30-580/MR has a module efficiency of 20.70%, while JA Solar JAM78S30-595/MR is 21.30%. Higher efficiency means more electricity from the same roof area - useful when space is limited.

Q: What cell technology does JA Solar JAM78S30-580/MR use vs JA Solar JAM78S30-595/MR?

JA Solar JAM78S30-580/MR uses PERC cells; JA Solar JAM78S30-595/MR uses PERC. Modern n-type technologies (TOPCon, HJT, BC) typically deliver higher efficiency and lower degradation compared to older PERC (p-type) cells.

Q: What is the warranty on JA Solar JAM78S30-580/MR and JA Solar JAM78S30-595/MR?

JA Solar JAM78S30-580/MR has a 25 years power warranty; JA Solar JAM78S30-595/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.

JAM78S30-580/MR

580 Wp 20.70 % PERC

Open panel page Datasheet PDF

JAM78S30-595/MR

595 Wp 21.30 % PERC

Open panel page Datasheet PDF

The verdict

595/MR leads on the differences that matter

The largest is module efficiency: 0.60 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

What actually differs

3 of 19 parameters

Parameter 580/MR 595/MR Difference

Module efficiency 20.70 % 21.30 % 0.60 pp more efficient

Power density 207.5 Wp/m² 212.9 Wp/m² 5.4 Wp/m² higher

Rated power 580 Wp 595 Wp 15 W more power

What it means on a roof

Thirty years of production

Each panel's own declared degradation curve, at 1,200 kWh/kWp a year

Cell temperature

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.

580/MR

18,797 kWh

595/MR

19,283 kWh

Lifetime gap

486 kWh

Output when it is hot

Rated power carried across the range a module actually sees

Scenario 580/MR 595/MR

Standard test conditions 25 °C 100.0% of rated power 580 W 595 W

Cool, bright day 40 °C 94.8% of rated power 550 W 564 W

Typical summer roof 55 °C 89.5% of rated power 519 W 533 W

Hot roof 70 °C 84.2% of rated power 489 W 501 W

Full specification

Parameter 580/MR 595/MR Difference

Power and efficiency

Rated power 580 Wp 595 Wp +15 W for 595/MR

Module efficiency 20.70 % 21.30 % +0.60 pp for 595/MR

Power density 207.5 Wp/m² 212.9 Wp/m² +5.4 Wp/m² for 595/MR

Open-circuit voltage 53.11 V 53.40 V Effectively the same

Voltage at max power 44.35 V 45.05 V Effectively the same

Short-circuit current 13.84 A 13.98 A Effectively the same

Current at max power 13.08 A 13.21 A Effectively the same

Temperature

Temperature coefficient -0.350 %/°C -0.350 %/°C Same

Mechanical

Dimensions 2465x1134x35 mm 2465x1134x35 mm Same

Module area 2.795 m² 2.795 m² Same

Weight 30.5 kg 30.5 kg Same

Weight per kWp 52.6 kg/kWp 51.3 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 156 156 Same

Bifacial No No Same

Against the whole database

14,129 panels

Efficiency

#10,842 vs #8,585

595/MR leads by 2,257 places

Power density

#10,672 vs #8,667

595/MR leads by 2,005 places

Heat behaviour

#10,489 vs #10,489

Tied - the same position in the database

Weight

#6,266 vs #4,683

595/MR leads by 1,583 places

Warranty

#9,912 vs #9,912

Tied - the same position in the database

Overall

#7,753 vs #6,416

595/MR leads by 1,337 places

More useful comparisons

Open the full database

Same series, other bin

JA Solar JAM78S30-580/MR vs JA Solar JAM78S30-605/MR

5 differences, the largest is module efficiency

Same series, other bin

JA Solar JAM78S30-580/MR vs JA Solar JAM78S30-600/MR

3 differences, the largest is module efficiency

Same series, other bin

JA Solar JAM78S30-580/MR vs JA Solar JAM78S30-590/MR

3 differences, the largest is module efficiency

Same series, other bin

JA Solar JAM78S30-580/MR vs JA Solar JAM78S30-585/MR

One difference: module efficiency

Same manufacturer

JA Solar JAM78S30-580/MR vs JA Solar JAM66D46-740/LB

16 differences, the largest is module efficiency

Same manufacturer

JA Solar JAM78S30-580/MR vs JA Solar JAM66D46-735/LB

16 differences, the largest is module efficiency

Written summary

Checking cache...

Questions about this pairing

Which panel is better: JA Solar JAM78S30-580/MR or JA Solar JAM78S30-595/MR?

According to our database: JA Solar JAM78S30-595/MR has higher module efficiency (21.30% vs 20.70%). See the full spec comparison and 30-year energy simulation above for a complete picture.

What is the efficiency of JA Solar JAM78S30-580/MR and JA Solar JAM78S30-595/MR?

JA Solar JAM78S30-580/MR has a module efficiency of 20.70%, while JA Solar JAM78S30-595/MR is 21.30%. Higher efficiency means more electricity from the same roof area - useful when space is limited.

What cell technology does JA Solar JAM78S30-580/MR use vs JA Solar JAM78S30-595/MR?

JA Solar JAM78S30-580/MR uses PERC cells; JA Solar JAM78S30-595/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 JAM78S30-580/MR and JA Solar JAM78S30-595/MR?

JA Solar JAM78S30-580/MR has a 25 years power warranty; JA Solar JAM78S30-595/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 318 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.