--- title: "Heckert Solar ZEUS 1.2 FullBlack 270W vs Heckert Solar ZEUS 2.2 710 - Solar Panel Comparison | ComparePV" description: "Compare Heckert Solar ZEUS 1.2 FullBlack 270W vs Heckert Solar ZEUS 2.2 710 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-270w/heckert-solar-zeus-2-2-710" updated: 2026-09-12 --- # Heckert Solar ZEUS 1.2 FullBlack 270W vs Heckert Solar ZEUS 2.2 710 14 differences, and they point both ways The largest is rated power: 440 W more power. 5 of 19 comparable parameters are identical. ## The two panels | Attribute | A | B | | --- | --- | --- | | Panel | [Heckert Solar ZEUS 1.2 FullBlack 270W](https://comparepv.com/panel/heckert-solar-zeus-1-2-fullblack-270w) | [Heckert Solar ZEUS 2.2 710](https://comparepv.com/panel/heckert-solar-zeus-2-2-710) | | Manufacturer | Heckert Solar | Heckert Solar | | Power | 270 Wp | 710 Wp | | Efficiency | 22.47 % | 22.90 % | | Technology | Back Contact | TOPCon | ## Where they differ Ranked by how much the difference matters, not by datasheet order. | Parameter | 1.2 FullBlack 270W | 2.2 710 | Difference | | --- | --- | --- | --- | | Rated power | 270 Wp | 710 Wp | +440 W for 2.2 710 | | Weight | 14.3 kg | 37.9 kg | -23.6 kg for 1.2 FullBlack 270W | | Product warranty | 30 yrs | 12 yrs | +18 yrs for 1.2 FullBlack 270W | | Module efficiency | 22.47 % | 22.90 % | +0.43 pp for 2.2 710 | | Temperature coefficient | -0.260 %/°C | -0.280 %/°C | +0.020 %/°C for 1.2 FullBlack 270W | | Open-circuit voltage | 23.67 V | 48.94 V | 25.27 V apart | | Short-circuit current | 14.58 A | 18.45 A | 3.87 A apart | | Module area | 1.201 m² | 3.106 m² | 1.905 m² apart | | Power density | 224.8 Wp/m² | 228.6 Wp/m² | +3.8 Wp/m² for 2.2 710 | | Cell technology | Back Contact | TOPCon | Back Contact vs TOPCon | | Voltage at max power | 20.23 V | 40.69 V | 20.46 V apart | | Current at max power | 13.35 A | 17.45 A | 4.10 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 270W | 2.2 710 | | --- | --- | --- | | Rated power | 270 Wp | 710 Wp | | Module efficiency | 22.47 % | 22.90 % | | Power density | 224.8 Wp/m² | 228.6 Wp/m² | | Open-circuit voltage | 23.67 V | 48.94 V | | Voltage at max power | 20.23 V | 40.69 V | | Short-circuit current | 14.58 A | 18.45 A | | Current at max power | 13.35 A | 17.45 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 | 53.0 kg/kWp | 53.4 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 270W:** 8,891 kWh - **Cumulative output, 2.2 710:** 23,381 kWh - **Gap:** 14,490 kWh ## Output when hot | Condition | Cell temperature | 1.2 FullBlack 270W | 2.2 710 | Retained | | --- | --- | --- | --- | --- | | Standard test conditions | 25 °C | 270 W | 710 W | 100.0% of rated power | | Cool, bright day | 40 °C | 259 W | 680 W | 95.8% of rated power | | Typical summer roof | 55 °C | 249 W | 650 W | 91.6% of rated power | | Hot roof | 70 °C | 238 W | 621 W | 87.4% of rated power | ## Against the whole database | Measure | 1.2 FullBlack 270W | 2.2 710 | Out of | Note | | --- | --- | --- | --- | --- | | Efficiency | #4,522 | #2,329 | 13,953 | 2.2 710 leads by 2,193 places | | Power density | #4,443 | #2,444 | 13,953 | 2.2 710 leads by 1,999 places | | Heat behaviour | #511 | #1,290 | 13,953 | 1.2 FullBlack 270W leads by 779 places | | Weight | #6,643 | #7,229 | 13,953 | 1.2 FullBlack 270W leads by 586 places | | Warranty | #21 | #21 | 13,953 | Tied - the same position in the database | | Overall | #10,521 | #807 | 13,953 | 2.2 710 leads by 9,714 places | ## Questions ### Which panel is better: Heckert Solar ZEUS 1.2 FullBlack 270W or Heckert Solar ZEUS 2.2 710? According to our database: **Heckert Solar ZEUS 2.2 710** has higher module efficiency (**22.90%** vs **22.47%**); **Heckert Solar ZEUS 1.2 FullBlack **270 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 270W and Heckert Solar ZEUS 2.2 710? **Heckert Solar ZEUS 1.2 FullBlack **270 W**** has a module efficiency of **22.47%**, while **Heckert Solar ZEUS 2.2 710** is **22.90%**. 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 270W use vs Heckert Solar ZEUS 2.2 710? **Heckert Solar ZEUS 1.2 FullBlack **270 W**** uses **Back Contact** cells; **Heckert Solar ZEUS 2.2 710** 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 270W and Heckert Solar ZEUS 2.2 710? **Heckert Solar ZEUS 1.2 FullBlack **270 W**** has a **30 years** power warranty; **Heckert Solar ZEUS 2.2 710** 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 270W and Heckert Solar ZEUS 2.2 710 bifacial panels? Both **Heckert Solar ZEUS 1.2 FullBlack **270 W**** and **Heckert Solar ZEUS 2.2 710** 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 270W vs Heckert Solar ZEUS 1.2 FullBlack 280W](https://comparepv.com/compare/heckert-solar-zeus-1-2-fullblack-270w/heckert-solar-zeus-1-2-fullblack-280w) - 3 differences, the largest is module efficiency - [Heckert Solar ZEUS 1.2 FullBlack 270W vs Heckert Solar ZEUS 1.2 FullBlack 275W](https://comparepv.com/compare/heckert-solar-zeus-1-2-fullblack-270w/heckert-solar-zeus-1-2-fullblack-275w) - 2 differences, the largest is module efficiency - [Heckert Solar ZEUS 2.2 710 vs Heckert Solar ZEUS 2.2 715](https://comparepv.com/compare/heckert-solar-zeus-2-2-710/heckert-solar-zeus-2-2-715) - The same specification on paper - [Heckert Solar ZEUS 2.2 710 vs Heckert Solar ZEUS 2.2-715](https://comparepv.com/compare/heckert-solar-zeus-2-2-710/heckert-solar-zeus-2-2-715-1) - The same specification on paper - [Heckert Solar ZEUS 2.2 710 vs Heckert Solar ZEUS 2.2-710](https://comparepv.com/compare/heckert-solar-zeus-2-2-710/heckert-solar-zeus-2-2-710-1) - The same specification on paper - [Heckert Solar ZEUS 2.2 710 vs Heckert Solar ZEUS 2.1-640](https://comparepv.com/compare/heckert-solar-zeus-2-2-710/heckert-solar-zeus-2-1-640) - 10 differences, the largest is module efficiency --- Source: https://comparepv.com/compare/heckert-solar-zeus-1-2-fullblack-270w/heckert-solar-zeus-2-2-710 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.