---
title: "Heckert Solar ZEUS 1.2 FullBlack 280W vs Heckert Solar ZEUS 2.2 715 - Solar Panel Comparison | ComparePV"
description: "Compare Heckert Solar ZEUS 1.2 FullBlack 280W vs Heckert Solar ZEUS 2.2 715 side by side: what actually differs, output when it is hot, thirty-year production, and the full specification."
source: "https://comparepv.com/compare/heckert-solar-zeus-1-2-fullblack-280w/heckert-solar-zeus-2-2-715"
updated: 2026-09-12
---

# Heckert Solar ZEUS 1.2 FullBlack 280W vs Heckert Solar ZEUS 2.2 715

1.2 FullBlack 280W leads on the differences that matter

The largest is rated power: 435 W more power. 6 of 19 comparable parameters are identical.


## The two panels


| Attribute | A | B |
| --- | --- | --- |
| Panel | [Heckert Solar ZEUS 1.2 FullBlack 280W](https://comparepv.com/panel/heckert-solar-zeus-1-2-fullblack-280w) | [Heckert Solar ZEUS 2.2 715](https://comparepv.com/panel/heckert-solar-zeus-2-2-715) |
| Manufacturer | Heckert Solar | Heckert Solar |
| Power | 280 Wp | 715 Wp |
| Efficiency | 23.31 % | 23.00 % |
| Technology | Back Contact | TOPCon |


## Where they differ

Ranked by how much the difference matters, not by datasheet order.


| Parameter | 1.2 FullBlack 280W | 2.2 715 | Difference |
| --- | --- | --- | --- |
| Rated power | 280 Wp | 715 Wp | +435 W for 2.2 715 |
| Weight | 14.3 kg | 37.9 kg | -23.6 kg for 1.2 FullBlack 280W |
| Product warranty | 30 yrs | 12 yrs | +18 yrs for 1.2 FullBlack 280W |
| Temperature coefficient | -0.260 %/°C | -0.280 %/°C | +0.020 %/°C for 1.2 FullBlack 280W |
| Open-circuit voltage | 24.11 V | 49.11 V | 25.00 V apart |
| Short-circuit current | 14.72 A | 18.50 A | 3.78 A apart |
| Module area | 1.201 m² | 3.106 m² | 1.905 m² apart |
| Module efficiency | 23.31 % | 23.00 % | +0.31 pp for 1.2 FullBlack 280W |
| Cell technology | Back Contact | TOPCon | Back Contact vs TOPCon |
| Voltage at max power | 20.49 V | 40.86 V | 20.37 V apart |
| Current at max power | 13.67 A | 17.50 A | 3.83 A apart |
| Cell count | 64 | 132 | 68 cells apart |
| Dimensions | 1560x770x35 mm | 2384x1303x33 mm | 1560x770x35 mm vs 2384x1303x33 mm |


## Every compared parameter


| Parameter | 1.2 FullBlack 280W | 2.2 715 |
| --- | --- | --- |
| Rated power | 280 Wp | 715 Wp |
| Module efficiency | 23.31 % | 23.00 % |
| Power density | 233.1 Wp/m² | 230.2 Wp/m² |
| Open-circuit voltage | 24.11 V | 49.11 V |
| Voltage at max power | 20.49 V | 40.86 V |
| Short-circuit current | 14.72 A | 18.50 A |
| Current at max power | 13.67 A | 17.50 A |
| Temperature coefficient | -0.260 %/°C | -0.280 %/°C |
| Dimensions | 1560x770x35 mm | 2384x1303x33 mm |
| Module area | 1.201 m² | 3.106 m² |
| Weight | 14.3 kg | 37.9 kg |
| Weight per kWp | 51.1 kg/kWp | 53.0 kg/kWp |
| Product warranty | 30 yrs | 12 yrs |
| Performance warranty | 30 yrs | 30 yrs |
| Annual degradation | 0.45 %/yr | 0.45 %/yr |
| Cell technology | Back Contact | TOPCon |
| Cell type | Monocrystalline | Monocrystalline |
| Cell count | 64 | 132 |
| Bifacial | Yes | Yes |


## Thirty-year yield

Each panel's own declared degradation curve, at 1,200 kWh/kWp a year

- **Cumulative output, 1.2 FullBlack 280W:** 9,221 kWh
- **Cumulative output, 2.2 715:** 23,546 kWh
- **Gap:** 14,325 kWh


## Output when hot


| Condition | Cell temperature | 1.2 FullBlack 280W | 2.2 715 | Retained |
| --- | --- | --- | --- | --- |
| Standard test conditions | 25 °C | 280 W | 715 W | 100.0% of rated power |
| Cool, bright day | 40 °C | 269 W | 685 W | 95.8% of rated power |
| Typical summer roof | 55 °C | 258 W | 655 W | 91.6% of rated power |
| Hot roof | 70 °C | 247 W | 625 W | 87.4% of rated power |


## Against the whole database


| Measure | 1.2 FullBlack 280W | 2.2 715 | Out of | Note |
| --- | --- | --- | --- | --- |
| Efficiency | #1,004 | #1,892 | 13,953 | 1.2 FullBlack 280W leads by 888 places |
| Power density | #1,084 | #1,992 | 13,953 | 1.2 FullBlack 280W leads by 908 places |
| Heat behaviour | #511 | #1,290 | 13,953 | 1.2 FullBlack 280W leads by 779 places |
| Weight | #4,382 | #6,704 | 13,953 | 1.2 FullBlack 280W leads by 2,322 places |
| Warranty | #21 | #21 | 13,953 | Tied - the same position in the database |
| Overall | #9,692 | #668 | 13,953 | 2.2 715 leads by 9,024 places |


## Questions


### Which panel is better: Heckert Solar ZEUS 1.2 FullBlack 280W or Heckert Solar ZEUS 2.2 715?

According to our database: **Heckert Solar ZEUS 1.2 FullBlack **280 W**** has higher module efficiency (**23.31%** vs **23.00%**); **Heckert Solar ZEUS 1.2 FullBlack **280 W**** tolerates heat better (temp coeff **-0.260%/°C** vs **-0.280%/°C**). 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 280W and Heckert Solar ZEUS 2.2 715?

**Heckert Solar ZEUS 1.2 FullBlack **280 W**** has a module efficiency of **23.31%**, while **Heckert Solar ZEUS 2.2 715** is **23.00%**. 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 280W use vs Heckert Solar ZEUS 2.2 715?

**Heckert Solar ZEUS 1.2 FullBlack **280 W**** uses **Back Contact** cells; **Heckert Solar ZEUS 2.2 715** 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 1.2 FullBlack 280W and Heckert Solar ZEUS 2.2 715?

**Heckert Solar ZEUS 1.2 FullBlack **280 W**** has a **30 years** power warranty; **Heckert Solar ZEUS 2.2 715** 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 280W and Heckert Solar ZEUS 2.2 715 bifacial panels?

Both **Heckert Solar ZEUS 1.2 FullBlack **280 W**** and **Heckert Solar ZEUS 2.2 715** 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.


## Related comparisons

- [Heckert Solar ZEUS 1.2 FullBlack 280W vs Heckert Solar ZEUS 1.2 FullBlack 275W](https://comparepv.com/compare/heckert-solar-zeus-1-2-fullblack-280w/heckert-solar-zeus-1-2-fullblack-275w) - 2 differences, the largest is module efficiency
- [Heckert Solar ZEUS 1.2 FullBlack 280W vs Heckert Solar ZEUS 1.2 FullBlack 270W](https://comparepv.com/compare/heckert-solar-zeus-1-2-fullblack-280w/heckert-solar-zeus-1-2-fullblack-270w) - 3 differences, the largest is module efficiency
- [Heckert Solar ZEUS 2.2 715 vs Heckert Solar ZEUS 2.2-715](https://comparepv.com/compare/heckert-solar-zeus-2-2-715/heckert-solar-zeus-2-2-715-1) - The same specification on paper
- [Heckert Solar ZEUS 2.2 715 vs Heckert Solar ZEUS 2.2 710](https://comparepv.com/compare/heckert-solar-zeus-2-2-715/heckert-solar-zeus-2-2-710) - The same specification on paper
- [Heckert Solar ZEUS 2.2 715 vs Heckert Solar ZEUS 2.2-710](https://comparepv.com/compare/heckert-solar-zeus-2-2-715/heckert-solar-zeus-2-2-710-1) - The same specification on paper
- [Heckert Solar ZEUS 2.2 715 vs Heckert Solar ZEUS 2.1-640](https://comparepv.com/compare/heckert-solar-zeus-2-2-715/heckert-solar-zeus-2-1-640) - 10 differences, the largest is module efficiency


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Source: https://comparepv.com/compare/heckert-solar-zeus-1-2-fullblack-280w/heckert-solar-zeus-2-2-715

Not in this file, on the page: the thirty-year yield curve year by year at a cell temperature you pick and a written summary generated on request.