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UHLDD108-420 vs UHLD108-440/N 14 of 19 identical Swap Change panels

ZNShine ZXM7-UHLDD108-420 vs ZNShine ZXM7-UHLD108-440/N

ZNShine ZXM7-UHLDD108-420
ZXM7-UHLDD108-420
420 Wp 21.51 % TOPCon Bifacial
Open panel page Datasheet PDF
VS
ZXM7-UHLD108-440/N
440 Wp 22.53 % TOPCon Bifacial
Open panel page Datasheet PDF
The verdict

UHLD108-440/N leads on the differences that matter

The largest is module efficiency: 1.02 pp more efficient. 14 of 19 comparable parameters are identical.

See all 5 differences
How alike are they
14 of 19 comparable
parameters are identical
identical differs
01

What actually differs

5 of 19 parameters
Parameter UHLDD108-420 UHLD108-440/N Difference
Module efficiency 21.51 % 22.53 % 1.02 pp more efficient
Power density 215.1 Wp/m² 225.3 Wp/m² 10.2 Wp/m² higher
Product warranty 12 yrs 15 yrs 3 yrs longer
Rated power 420 Wp 440 Wp 20 W more power
Weight per kWp 58.3 kg/kWp 55.7 kg/kWp 2.7 kg/kWp lighter
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.
UHLDD108-420
14,092 kWh
UHLD108-440/N
14,763 kWh
Lifetime gap
671 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario UHLDD108-420 UHLD108-440/N
Standard test conditions 25 °C 100.0% of rated power 420 W 440 W
Cool, bright day 40 °C 95.5% of rated power 401 W 420 W
Typical summer roof 55 °C 91.0% of rated power 382 W 400 W
Hot roof 70 °C 86.5% of rated power 363 W 381 W
03

Full specification

Parameter UHLDD108-420 UHLD108-440/N Difference
Power and efficiency
Rated power 420 Wp 440 Wp +20 W for UHLD108-440/N
Module efficiency 21.51 % 22.53 % +1.02 pp for UHLD108-440/N
Power density 215.1 Wp/m² 225.3 Wp/m² +10.2 Wp/m² for UHLD108-440/N
Open-circuit voltage 38.00 V 38.90 V Effectively the same
Voltage at max power 31.50 V 32.30 V Effectively the same
Short-circuit current 14.11 A 14.39 A Effectively the same
Current at max power 13.34 A 13.63 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 55.7 kg/kWp -2.7 kg/kWp for UHLD108-440/N
Warranty and degradation
Product warranty 12 yrs 15 yrs +3 yrs for UHLD108-440/N
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 #3,982
UHLD108-440/N leads by 3,912 places
Power density
#7,882 vs #4,099
UHLD108-440/N leads by 3,783 places
Heat behaviour
#6,093 vs #6,093
Tied - the same position in the database
Weight
#11,670 vs #10,051
UHLD108-440/N leads by 1,619 places
Warranty
#21 vs #21
Tied - the same position in the database
Overall
#10,637 vs #8,838
UHLD108-440/N leads by 1,799 places
05

More useful comparisons

Open the full database
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
Same series, other bin
ZNShine ZXM7-UHLDD108-420 vs ZNShine ZXM7-UHLDD108-425
One difference: module efficiency
06

Written summary

07

Questions about this pairing

Which panel is better: ZNShine ZXM7-UHLDD108-420 or ZNShine ZXM7-UHLD108-440/N?
According to our database: ZNShine ZXM7-UHLD108-440/N has higher module efficiency (22.53% 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-UHLD108-440/N?
ZNShine ZXM7-UHLDD108-420 has a module efficiency of 21.51%, while ZNShine ZXM7-UHLD108-440/N is 22.53%. 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-UHLD108-440/N?
ZNShine ZXM7-UHLDD108-420 uses TOPCon cells; ZNShine ZXM7-UHLD108-440/N 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-UHLD108-440/N?
ZNShine ZXM7-UHLDD108-420 has a 30 years power warranty; ZNShine ZXM7-UHLD108-440/N 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-UHLD108-440/N bifacial panels?
Both ZNShine ZXM7-UHLDD108-420 and ZNShine ZXM7-UHLD108-440/N 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.

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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.