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660M-132HV vs 705M-132DGN 6 of 19 identical Swap Change panels

Ulica Solar UL-660M-132HV vs Ulica Solar UL-705M-132DGN

Ulica Solar
UL-660M-132HV
660 Wp 21.25 % TOPCon
Open panel page Datasheet PDF
VS
Ulica Solar
UL-705M-132DGN
705 Wp 22.70 % TOPCon Bifacial
Open panel page Datasheet PDF
The verdict

705M-132DGN leads on the differences that matter

The largest is module efficiency: 1.45 pp more efficient. 6 of 19 comparable parameters are identical.

See all 13 differences
How alike are they
6 of 19 comparable
parameters are identical
identical differs
01

What actually differs

13 of 19 parameters
Parameter 660M-132HV 705M-132DGN Difference
Module efficiency 21.25 % 22.70 % 1.45 pp more efficient
Temperature coefficient -0.340 %/°C -0.290 %/°C 0.050 %/°C better in heat
Rated power 660 Wp 705 Wp 45 W more power
Power density 212.5 Wp/m² 227.0 Wp/m² 14.5 Wp/m² higher
Performance warranty 25 yrs 30 yrs 5 yrs longer
Annual degradation 0.55 %/yr 0.40 %/yr 0.15 %/yr slower
Weight 33.3 kg 37.4 kg 4.1 kg lighter
Product warranty 12 yrs 15 yrs 3 yrs longer
Open-circuit voltage 45.70 V 48.72 V 3.02 V apart
Weight per kWp 50.5 kg/kWp 53.0 kg/kWp 2.6 kg/kWp lighter
Bifacial No Yes No vs Yes
Voltage at max power 38.20 V 40.69 V 2.49 V apart
Dimensions 2384x1303x35 mm 2384x1303x33 mm 2384x1303x35 mm vs 2384x1303x33 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
660M-132HV
21,390 kWh
705M-132DGN
23,654 kWh
Lifetime gap
2,264 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario 660M-132HV 705M-132DGN
Standard test conditions 25 °C 100.0% of rated power 660 W 705 W
Cool, bright day 40 °C 94.9% of rated power 626 W 674 W
Typical summer roof 55 °C 89.8% of rated power 593 W 644 W
Hot roof 70 °C 84.7% of rated power 559 W 613 W
03

Full specification

Parameter 660M-132HV 705M-132DGN Difference
Power and efficiency
Rated power 660 Wp 705 Wp +45 W for 705M-132DGN
Module efficiency 21.25 % 22.70 % +1.45 pp for 705M-132DGN
Power density 212.5 Wp/m² 227.0 Wp/m² +14.5 Wp/m² for 705M-132DGN
Open-circuit voltage 45.70 V 48.72 V 3.02 V apart
Voltage at max power 38.20 V 40.69 V 2.49 V apart
Short-circuit current 18.44 A 18.36 A Effectively the same
Current at max power 17.28 A 17.33 A Effectively the same
Temperature
Temperature coefficient -0.340 %/°C -0.290 %/°C +0.050 %/°C for 705M-132DGN
Mechanical
Dimensions 2384x1303x35 mm 2384x1303x33 mm 2384x1303x35 mm vs 2384x1303x33 mm
Module area 3.106 m² 3.106 m² Same
Weight 33.3 kg 37.4 kg -4.1 kg for 660M-132HV
Weight per kWp 50.5 kg/kWp 53.0 kg/kWp -2.6 kg/kWp for 660M-132HV
Warranty and degradation
Product warranty 12 yrs 15 yrs +3 yrs for 705M-132DGN
Performance warranty 25 yrs 30 yrs +5 yrs for 705M-132DGN
Annual degradation 0.55 %/yr 0.40 %/yr -0.15 %/yr for 705M-132DGN
Technology
Cell technology TOPCon TOPCon Same
Cell type Monocrystalline Monocrystalline Same
Cell count 132 132 Same
Bifacial No Yes No vs Yes
04

Against the whole database

14,005 panels
Efficiency
#8,904 vs #3,307
705M-132DGN leads by 5,597 places
Power density
#8,959 vs #3,361
705M-132DGN leads by 5,598 places
Heat behaviour
#8,778 vs #2,165
705M-132DGN leads by 6,613 places
Weight
#3,831 vs #6,803
660M-132HV leads by 2,972 places
Warranty
#9,798 vs #21
705M-132DGN leads by 9,777 places
Overall
#4,111 vs #738
705M-132DGN leads by 3,373 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: Ulica Solar UL-660M-132HV or Ulica Solar UL-705M-132DGN?
According to our database: Ulica Solar UL-705M-132DGN has higher module efficiency (22.70% vs 21.25%); Ulica Solar UL-705M-132DGN tolerates heat better (temp coeff -0.290%/°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 Ulica Solar UL-660M-132HV and Ulica Solar UL-705M-132DGN?
Ulica Solar UL-660M-132HV has a module efficiency of 21.25%, while Ulica Solar UL-705M-132DGN is 22.70%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does Ulica Solar UL-660M-132HV use vs Ulica Solar UL-705M-132DGN?
Ulica Solar UL-660M-132HV uses TOPCon cells; Ulica Solar UL-705M-132DGN 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 Ulica Solar UL-660M-132HV and Ulica Solar UL-705M-132DGN?
Ulica Solar UL-660M-132HV has a 25 years power warranty; Ulica Solar UL-705M-132DGN 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 Ulica Solar UL-660M-132HV and Ulica Solar UL-705M-132DGN bifacial panels?
Ulica Solar UL-705M-132DGN is bifacial (captures light from both faces); Ulica Solar UL-660M-132HV is monofacial. Bifacial panels work best on ground mounts or raised structures with a light-coloured surface underneath.

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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.