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420 vs 425 18 of 19 identical Swap Change panels

ZNShine ZXM7-UHLDD108-420 vs ZNShine ZXM7-UHLDD108-425

ZNShine ZXM7-UHLDD108-420
ZXM7-UHLDD108-420
420 Wp 21.51 % TOPCon Bifacial
Open panel page Datasheet PDF
VS
ZNShine ZXM7-UHLDD108-425
ZXM7-UHLDD108-425
425 Wp 21.76 % TOPCon Bifacial
Open panel page Datasheet PDF
The verdict

425 leads on the differences that matter

The largest is module efficiency: 0.25 pp more efficient. 18 of 19 comparable parameters are identical.

See the one difference
How alike are they
18 of 19 comparable
parameters are identical
identical differs
01

What actually differs

1 of 19 parameters
Parameter 420 425 Difference
Module efficiency 21.51 % 21.76 % 0.25 pp more efficient
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 (-0.300 %/°C), so a warmer roof scales both curves by the same factor: the totals fall together and neither panel gains on the other.
420
14,092 kWh
425
14,260 kWh
Lifetime gap
168 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario 420 425
Standard test conditions 25 °C 100.0% of rated power 420 W 425 W
Cool, bright day 40 °C 95.5% of rated power 401 W 406 W
Typical summer roof 55 °C 91.0% of rated power 382 W 387 W
Hot roof 70 °C 86.5% of rated power 363 W 368 W
03

Full specification

Parameter 420 425 Difference
Power and efficiency
Rated power 420 Wp 425 Wp Effectively the same
Module efficiency 21.51 % 21.76 % +0.25 pp for 425
Power density 215.1 Wp/m² 217.6 Wp/m² Effectively the same
Open-circuit voltage 38.00 V 38.20 V Effectively the same
Voltage at max power 31.50 V 31.70 V Effectively the same
Short-circuit current 14.11 A 14.18 A Effectively the same
Current at max power 13.34 A 13.41 A Effectively the same
Temperature
Temperature coefficient -0.300 %/°C -0.300 %/°C Same
Mechanical
Dimensions 1722x1134x30 mm 1722x1134x30 mm Same
Module area 1.953 m² 1.953 m² Same
Weight 24.5 kg 24.5 kg Same
Weight per kWp 58.3 kg/kWp 57.6 kg/kWp Effectively the same
Warranty and degradation
Product warranty 12 yrs 12 yrs Same
Performance warranty 30 yrs 30 yrs Same
Annual degradation 0.40 %/yr 0.40 %/yr Same
Technology
Cell technology TOPCon TOPCon Same
Cell type Monocrystalline Monocrystalline Same
Cell count 108 108 Same
Bifacial Yes Yes Same
04

Against the whole database

14,005 panels
Efficiency
#7,894 vs #7,285
425 leads by 609 places
Power density
#7,882 vs #7,172
425 leads by 710 places
Heat behaviour
#6,093 vs #6,093
Tied - the same position in the database
Weight
#11,670 vs #11,325
425 leads by 345 places
Warranty
#21 vs #21
Tied - the same position in the database
Overall
#10,637 vs #10,374
425 leads by 263 places
05

More useful comparisons

Open the full database
Same series, other bin
ZNShine ZXM7-UHLDD108-420 vs ZNShine ZXM7-UHLD108-440/N
5 differences, the largest is module efficiency
Same series, other bin
ZNShine ZXM7-UHLDD108-420 vs ZNShine ZXM7-UHLD108-435/N
5 differences, the largest is module efficiency
Same series, other bin
ZNShine ZXM7-UHLDD108-420 vs ZNShine ZXM7-UHLDD108-435
4 differences, the largest is module efficiency
Same series, other bin
ZNShine ZXM7-UHLDD108-420 vs ZNShine ZXM7-UHLD108-430/N
4 differences, the largest is module efficiency
Same series, other bin
ZNShine ZXM7-UHLDD108-420 vs ZNShine ZXM7-UHLDD108-430
3 differences, the largest is module efficiency
Same series, other bin
ZNShine ZXM7-UHLDD108-420 vs ZNShine ZXM7-UHLD108-425/N
2 differences, the largest is product warranty
06

Written summary

07

Questions about this pairing

Which panel is better: ZNShine ZXM7-UHLDD108-420 or ZNShine ZXM7-UHLDD108-425?
According to our database: ZNShine ZXM7-UHLDD108-425 has higher module efficiency (21.76% vs 21.51%). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of ZNShine ZXM7-UHLDD108-420 and ZNShine ZXM7-UHLDD108-425?
ZNShine ZXM7-UHLDD108-420 has a module efficiency of 21.51%, while ZNShine ZXM7-UHLDD108-425 is 21.76%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does ZNShine ZXM7-UHLDD108-420 use vs ZNShine ZXM7-UHLDD108-425?
ZNShine ZXM7-UHLDD108-420 uses TOPCon cells; ZNShine ZXM7-UHLDD108-425 uses TOPCon. 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 ZNShine ZXM7-UHLDD108-420 and ZNShine ZXM7-UHLDD108-425?
ZNShine ZXM7-UHLDD108-420 has a 30 years power warranty; ZNShine ZXM7-UHLDD108-425 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 ZNShine ZXM7-UHLDD108-420 and ZNShine ZXM7-UHLDD108-425 bifacial panels?
Both ZNShine ZXM7-UHLDD108-420 and ZNShine ZXM7-UHLDD108-425 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 12 ZNShine 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.