Heckert Solar ZEUS 2.2 715 vs Heckert Solar ZEUS 2.1 635W
VS
The verdict
1 635W leads on the differences that matter
The largest is rated power: 80 W more power. 11 of 19 comparable parameters are identical.
See all 8 differencesHow alike are they
11
of 19 comparable
parameters are identical
parameters are identical
identical
differs
01
8 of 19 parameters
What actually differs
Parameter
2 715
1 635W
Difference
Rated power
715 Wp
635 Wp
80 W more power
Module efficiency
23.00 %
23.50 %
0.50 pp more efficient
Weight
37.9 kg
32.5 kg
5.4 kg lighter
Short-circuit current
18.50 A
16.26 A
2.24 A apart
Module area
3.106 m²
2.701 m²
0.405 m² apart
Power density
230.2 Wp/m²
235.1 Wp/m²
4.9 Wp/m² higher
Current at max power
17.50 A
15.40 A
2.10 A apart
Dimensions
2384x1303x33 mm
2382x1134x30 mm
2384x1303x33 mm vs 2382x1134x30 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
Same temp coeff. for both panels (-0.280 %/°C), so a warmer roof scales both curves by the same factor: the totals fall together and neither panel gains on the other.
2 715
23,546 kWh
1 635W
20,911 kWh
Lifetime gap
2,635 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario
2 715
1 635W
Standard test conditions
25 °C
100.0% of rated power
715 W
635 W
Cool, bright day
40 °C
95.8% of rated power
685 W
608 W
Typical summer roof
55 °C
91.6% of rated power
655 W
582 W
Hot roof
70 °C
87.4% of rated power
625 W
555 W
03
Full specification
Parameter
2 715
1 635W
Difference
Power and efficiency
Rated power
715 Wp
635 Wp
+80 W for 2 715
Module efficiency
23.00 %
23.50 %
+0.50 pp for 1 635W
Power density
230.2 Wp/m²
235.1 Wp/m²
+4.9 Wp/m² for 1 635W
Open-circuit voltage
49.11 V
49.60 V
Effectively the same
Voltage at max power
40.86 V
41.24 V
Effectively the same
Short-circuit current
18.50 A
16.26 A
2.24 A apart
Current at max power
17.50 A
15.40 A
2.10 A apart
Temperature
Temperature coefficient
-0.280 %/°C
-0.280 %/°C
Same
Mechanical
Dimensions
2384x1303x33 mm
2382x1134x30 mm
2384x1303x33 mm vs 2382x1134x30 mm
Module area
3.106 m²
2.701 m²
0.405 m² apart
Weight
37.9 kg
32.5 kg
-5.4 kg for 1 635W
Weight per kWp
53.0 kg/kWp
51.2 kg/kWp
Effectively the same
Warranty and degradation
Product warranty
12 yrs
12 yrs
Same
Performance warranty
30 yrs
30 yrs
Same
Annual degradation
0.45 %/yr
0.45 %/yr
Same
Technology
Cell technology
TOPCon
TOPCon
Same
Cell type
Monocrystalline
Monocrystalline
Same
Cell count
132
132
Same
Bifacial
Yes
Yes
Same
04
14,129 panels
Against the whole database
Efficiency
#1,970
vs
#749
1 635W leads by 1,221 places
Power density
#2,070
vs
#777
1 635W leads by 1,293 places
Heat behaviour
#1,347
vs
#1,347
Tied - the same position in the database
Weight
#6,802
vs
#4,581
1 635W leads by 2,221 places
Warranty
#21
vs
#21
Tied - the same position in the database
Overall
#691
vs
#1,760
2 715 leads by 1,069 places
05
Open the full database
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06
Written summary
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07
Questions about this pairing
Which panel is better: Heckert Solar ZEUS 2.2 715 or Heckert Solar ZEUS 2.1 635W?
According to our database: Heckert Solar ZEUS 2.1 635 W has higher module efficiency (23.50% vs 23.00%). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of Heckert Solar ZEUS 2.2 715 and Heckert Solar ZEUS 2.1 635W?
Heckert Solar ZEUS 2.2 715 has a module efficiency of 23.00%, while Heckert Solar ZEUS 2.1 635 W is 23.50%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does Heckert Solar ZEUS 2.2 715 use vs Heckert Solar ZEUS 2.1 635W?
Heckert Solar ZEUS 2.2 715 uses TOPCon cells; Heckert Solar ZEUS 2.1 635 W 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 Heckert Solar ZEUS 2.2 715 and Heckert Solar ZEUS 2.1 635W?
Heckert Solar ZEUS 2.2 715 has a 30 years power warranty; Heckert Solar ZEUS 2.1 635 W 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 Heckert Solar ZEUS 2.2 715 and Heckert Solar ZEUS 2.1 635W bifacial panels?
Both Heckert Solar ZEUS 2.2 715 and Heckert Solar ZEUS 2.1 635 W 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 16 Heckert 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.