--- title: "Heckert Solar ZEUS 1.2-280 vs Heckert Solar ZEUS 1.2 FullBlack 280W - Solar Panel Comparison | ComparePV" description: "Compare Heckert Solar ZEUS 1.2-280 vs Heckert Solar ZEUS 1.2 FullBlack 280W 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-1-2-280/heckert-solar-zeus-1-2-fullblack-280w" updated: 2026-09-13 --- # Heckert Solar ZEUS 1.2-280 vs Heckert Solar ZEUS 1.2 FullBlack 280W Identical on every published parameter All 19 comparable parameters agree. Two records this alike are usually one panel sold under two names, or two bins of the same production line - decide on price and on who you would rather buy from. ## The two panels | Attribute | A | B | | --- | --- | --- | | Panel | [Heckert Solar ZEUS 1.2-280](https://comparepv.com/panel/heckert-solar-zeus-1-2-280) | [Heckert Solar ZEUS 1.2 FullBlack 280W](https://comparepv.com/panel/heckert-solar-zeus-1-2-fullblack-280w) | | Manufacturer | Heckert Solar | Heckert Solar | | Power | 280 Wp | 280 Wp | | Efficiency | 23.31 % | 23.31 % | | Technology | Back Contact | Back Contact | ## Every compared parameter | Parameter | 2-280 | 2 FullBlack 280W | | --- | --- | --- | | Rated power | 280 Wp | 280 Wp | | Module efficiency | 23.31 % | 23.31 % | | Power density | 233.1 Wp/m² | 233.1 Wp/m² | | Open-circuit voltage | 24.11 V | 24.11 V | | Voltage at max power | 20.49 V | 20.49 V | | Short-circuit current | 14.72 A | 14.72 A | | Current at max power | 13.67 A | 13.67 A | | Temperature coefficient | -0.260 %/°C | -0.260 %/°C | | Dimensions | 1560x770x35 mm | 1560x770x35 mm | | Module area | 1.201 m² | 1.201 m² | | Weight | 14.3 kg | 14.3 kg | | Weight per kWp | 51.1 kg/kWp | 51.1 kg/kWp | | Product warranty | 30 yrs | 30 yrs | | Performance warranty | 30 yrs | 30 yrs | | Annual degradation | 0.45 %/yr | 0.45 %/yr | | Cell technology | Back Contact | Back Contact | | Cell type | Monocrystalline | Monocrystalline | | Cell count | 64 | 64 | | Bifacial | Yes | Yes | ## Thirty-year yield 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. - **Cumulative output, 2-280:** 9,221 kWh - **Cumulative output, 2 FullBlack 280W:** 9,221 kWh - **Gap:** No difference ## Output when hot | Condition | Cell temperature | 2-280 | 2 FullBlack 280W | Retained | | --- | --- | --- | --- | --- | | Standard test conditions | 25 °C | 280 W | 280 W | 100.0% of rated power | | Cool, bright day | 40 °C | 269 W | 269 W | 96.1% of rated power | | Typical summer roof | 55 °C | 258 W | 258 W | 92.2% of rated power | | Hot roof | 70 °C | 247 W | 247 W | 88.3% of rated power | ## Against the whole database | Measure | 2-280 | 2 FullBlack 280W | Out of | Note | | --- | --- | --- | --- | --- | | Efficiency | #1,004 | #1,004 | 13,953 | Tied - the same position in the database | | Power density | #1,084 | #1,084 | 13,953 | Tied - the same position in the database | | Heat behaviour | #511 | #511 | 13,953 | Tied - the same position in the database | | Weight | #4,382 | #4,382 | 13,953 | Tied - the same position in the database | | Warranty | #21 | #21 | 13,953 | Tied - the same position in the database | | Overall | #9,692 | #9,692 | 13,953 | Tied - the same position in the database | ## Questions ### Which panel is better: Heckert Solar ZEUS 1.2-280 or Heckert Solar ZEUS 1.2 FullBlack 280W? According to our database: both panels are closely matched on key specs - the decision often comes down to price and local availability. See the full spec comparison and 30-year energy simulation above for a complete picture. ### What is the efficiency of Heckert Solar ZEUS 1.2-280 and Heckert Solar ZEUS 1.2 FullBlack 280W? **Heckert Solar ZEUS 1.2-280** has a module efficiency of **23.31%**, while **Heckert Solar ZEUS 1.2 FullBlack **280 W**** 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 1.2-280 use vs Heckert Solar ZEUS 1.2 FullBlack 280W? **Heckert Solar ZEUS 1.2-280** uses **Back Contact** cells; **Heckert Solar ZEUS 1.2 FullBlack **280 W**** 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 1.2-280 and Heckert Solar ZEUS 1.2 FullBlack 280W? **Heckert Solar ZEUS 1.2-280** has a **30 years** power warranty; **Heckert Solar ZEUS 1.2 FullBlack **280 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 1.2-280 and Heckert Solar ZEUS 1.2 FullBlack 280W bifacial panels? Both **Heckert Solar ZEUS 1.2-280** and **Heckert Solar ZEUS 1.2 FullBlack **280 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. ## Related comparisons - [Heckert Solar ZEUS 1.2-280 vs Heckert Solar ZEUS 2.1-640](https://comparepv.com/compare/heckert-solar-zeus-1-2-280/heckert-solar-zeus-2-1-640) - 14 differences, the largest is rated power - [Heckert Solar ZEUS 1.2-280 vs Heckert Solar ZEUS 2.1 640W](https://comparepv.com/compare/heckert-solar-zeus-1-2-280/heckert-solar-zeus-2-1-640w) - 14 differences, the largest is rated power - [Heckert Solar ZEUS 1.2-280 vs Heckert Solar ZEUS 2.1-635](https://comparepv.com/compare/heckert-solar-zeus-1-2-280/heckert-solar-zeus-2-1-635) - 12 differences, the largest is rated power - [Heckert Solar ZEUS 1.2-280 vs Heckert Solar ZEUS 2.1 635W](https://comparepv.com/compare/heckert-solar-zeus-1-2-280/heckert-solar-zeus-2-1-635w) - 12 differences, the largest is rated power - [Heckert Solar ZEUS 1.2-280 vs Heckert Solar ZEUS 1.2 FullBlack 275W](https://comparepv.com/compare/heckert-solar-zeus-1-2-280/heckert-solar-zeus-1-2-fullblack-275w) - 2 differences, the largest is module efficiency - [Heckert Solar ZEUS 1.2-280 vs Heckert Solar ZEUS 1.2-275](https://comparepv.com/compare/heckert-solar-zeus-1-2-280/heckert-solar-zeus-1-2-275) - 2 differences, the largest is module efficiency --- Source: https://comparepv.com/compare/heckert-solar-zeus-1-2-280/heckert-solar-zeus-1-2-fullblack-280w 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.