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2 FullBlack 275W vs 2-280 17 of 19 identical Swap Change panels

Heckert Solar ZEUS 1.2 FullBlack 275W vs Heckert Solar ZEUS 1.2-280

Heckert Solar
ZEUS 1.2 FullBlack 275W
275 Wp 22.89 % Back Contact Bifacial
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VS
Heckert Solar
ZEUS 1.2-280
280 Wp 23.31 % Back Contact Bifacial
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The verdict

2-280 leads on the differences that matter

The largest is module efficiency: 0.42 pp more efficient. 17 of 19 comparable parameters are identical.

See all 2 differences
How alike are they
17 of 19 comparable
parameters are identical
identical differs
01

What actually differs

2 of 19 parameters
Parameter 2 FullBlack 275W 2-280 Difference
Module efficiency 22.89 % 23.31 % 0.42 pp more efficient
Power density 228.9 Wp/m² 233.1 Wp/m² 4.2 Wp/m² higher
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 (-0.260 %/°C), so a warmer roof scales both curves by the same factor: the totals fall together and neither panel gains on the other.
2 FullBlack 275W
9,056 kWh
2-280
9,221 kWh
Lifetime gap
165 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario 2 FullBlack 275W 2-280
Standard test conditions 25 °C 100.0% of rated power 275 W 280 W
Cool, bright day 40 °C 96.1% of rated power 264 W 269 W
Typical summer roof 55 °C 92.2% of rated power 254 W 258 W
Hot roof 70 °C 88.3% of rated power 243 W 247 W
03

Full specification

Parameter 2 FullBlack 275W 2-280 Difference
Power and efficiency
Rated power 275 Wp 280 Wp Effectively the same
Module efficiency 22.89 % 23.31 % +0.42 pp for 2-280
Power density 228.9 Wp/m² 233.1 Wp/m² +4.2 Wp/m² for 2-280
Open-circuit voltage 23.89 V 24.11 V Effectively the same
Voltage at max power 20.36 V 20.49 V Effectively the same
Short-circuit current 14.65 A 14.72 A Effectively the same
Current at max power 13.51 A 13.67 A Effectively the same
Temperature
Temperature coefficient -0.260 %/°C -0.260 %/°C Same
Mechanical
Dimensions 1560x770x35 mm 1560x770x35 mm Same
Module area 1.201 m² 1.201 m² Same
Weight 14.3 kg 14.3 kg Same
Weight per kWp 52.0 kg/kWp 51.1 kg/kWp Effectively the same
Warranty and degradation
Product warranty 30 yrs 30 yrs Same
Performance warranty 30 yrs 30 yrs Same
Annual degradation 0.45 %/yr 0.45 %/yr Same
Technology
Cell technology Back Contact Back Contact Same
Cell type Monocrystalline Monocrystalline Same
Cell count 64 64 Same
Bifacial Yes Yes Same
04

Against the whole database

13,953 panels
Efficiency
#2,490 vs #1,004
2-280 leads by 1,486 places
Power density
#2,404 vs #1,084
2-280 leads by 1,320 places
Heat behaviour
#511 vs #511
Tied - the same position in the database
Weight
#5,386 vs #4,382
2-280 leads by 1,004 places
Warranty
#21 vs #21
Tied - the same position in the database
Overall
#10,137 vs #9,692
2-280 leads by 445 places
05

More useful comparisons

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06

Written summary

07

Questions about this pairing

Which panel is better: Heckert Solar ZEUS 1.2 FullBlack 275W or Heckert Solar ZEUS 1.2-280?
According to our database: Heckert Solar ZEUS 1.2-280 has higher module efficiency (23.31% vs 22.89%). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of Heckert Solar ZEUS 1.2 FullBlack 275W and Heckert Solar ZEUS 1.2-280?
Heckert Solar ZEUS 1.2 FullBlack 275 W has a module efficiency of 22.89%, while Heckert Solar ZEUS 1.2-280 is 23.31%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does Heckert Solar ZEUS 1.2 FullBlack 275W use vs Heckert Solar ZEUS 1.2-280?
Heckert Solar ZEUS 1.2 FullBlack 275 W uses Back Contact cells; Heckert Solar ZEUS 1.2-280 uses Back Contact. 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 1.2 FullBlack 275W and Heckert Solar ZEUS 1.2-280?
Heckert Solar ZEUS 1.2 FullBlack 275 W has a 30 years power warranty; Heckert Solar ZEUS 1.2-280 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 1.2 FullBlack 275W and Heckert Solar ZEUS 1.2-280 bifacial panels?
Both Heckert Solar ZEUS 1.2 FullBlack 275 W and Heckert Solar ZEUS 1.2-280 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.