--- title: "Heckert Solar ZEUS 1.0 445WP 445W Solar Panel - Specs & Review | ComparePV" description: "Heckert Solar ZEUS 1.0 445WP 445W solar panel. Specs: 22.30% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/heckert-solar-zeus-1-0-445wp" updated: 2026-09-11 --- # Heckert Solar ZEUS 1.0 445WP Efficiency leader, no clear weak spot 1,218 panels in the segment TOPCon 400-450 W ## Identity - **Manufacturer:** Heckert Solar - **Model:** ZEUS 1.0 445WP - **Series:** ZEUS 1.0 - **Rated power:** 445 W - **Cell technology:** TOPCon - **Bifacial:** yes ## How it compares Compared against segment TOPCon 400-450 W (1218 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 445 W | 435 W | Strong - top 8% | | | Module efficiency | 22.30% | 22.00% | Strong - top 17% | 5,100 | | Power density | 222.7 | 220.2 | Typical | 5,302 | | Temperature coefficient | -0.290 | -0.290 | Typical | 2,165 | | Weight (kg) | 24.5 kg | 22.0 kg | Typical | | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 22.30% | 22.00% | Strong - top 17% | 5,100 | | Power density | 222.7 | 220.2 | Typical | 5,302 | | Temperature coefficient | -0.290 | -0.290 | Typical | 2,165 | | Weight per kWp | 55.1 | 51.4 | Typical | 9,435 | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Strengths - **22.30% module efficiency** - Top 17% of the TOPCon 400-450 W segment, against a median of 22.00%. - **Best for:** Residential, commercial and hot-climate. ## Specification ### Electrical - **Rated power (Pmax):** 445 W - **Efficiency:** 22.30 % - **Voltage at Pmax (Vmp):** 33.04 V - **Current at Pmax (Imp):** 13.47 A - **Open-circuit voltage (Voc):** 39.60 V - **Short-circuit current (Isc):** 13.97 A - **Max system voltage:** 1500 V ### Temperature - **Temperature coefficient of Pmax:** -0.290 %/degC - **Temperature coefficient of Voc:** -0.250 %/degC - **Temperature coefficient of Isc:** 0.048 %/degC - **NOCT:** 42 degC ### Cell and construction - **Cell type:** Monocrystalline - **Cell technology:** TOPCon - **Cell count:** 108 - **Bifacial:** yes ### Physical - **Length:** 1762 mm - **Width:** 1134 mm - **Thickness:** 30 mm - **Weight:** 24.5 kg - **Area:** 2.00 m2 - **Power density:** 222.7 Wp/m2 ### Warranty and degradation - **Product warranty:** 30 years - **Performance warranty:** 30 years - **Output guaranteed at end of warranty:** 85.0 % - **First-year degradation:** 2.00 % - **Annual degradation:** 0.45 % - **Output after 30 years:** 378 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 5100 of 14005 | | Power density | 5302 of 14005 | | Temperature coefficient | 2165 of 14005 | | Weight | 9435 of 14005 | | Warranty | 21 of 14005 | ## Pros - **Manufactured exclusively in Germany** - Modules are produced at facilities in Chemnitz and Langenwetzendorf (Thuringia), ensuring full supply-chain traceability and zero geopolitical exposure linked to Asian imports. In the context of ongoing EU tariff debates and potential Chinese supply disruptions, this is a tangible operational advantage for installers and project developers. - **30-year product and power warranty** - Heckert Solar provides a 30-year warranty on both the product and power output — whereas peer comparable Q.TRON BLACK (Q-Cells) offers a standard 25-year performance guarantee. The longer warranty directly lowers LCOE and simplifies long-term project financing. - **N-type TOPCon + bifacial glass-glass design** - N-type TOPCon cells deliver a temperature coefficient of Pmax of approximately -0.28 %/°C (confirmed for the ZEUS series), translating to ~17% lower thermal losses than typical PERC cells (-0.34 %/°C). The bifacial glass-glass structure enables additional rear-side energy yield — up to ~20% at high-albedo surfaces such as light-colored gravel or TPO membranes. - **22.3% efficiency — top of segment** - ZEUS 1.0 achieves 22.3% module efficiency, matching Q-Cells Q.TRON BLACK 445W (22.3%) — a direct Tier-1 rival — and clearly outperforming SunEvo SE6-46SC 445W (21.4%) and Solitek SOLRIF D Satin 445W (22.06%). The 5% power-density advantage over SunEvo is particularly relevant for constrained roof areas. - **Glass-glass construction: mechanical durability and PID-free** - Certified for snow load up to 8,100 Pa and wind load up to 2,400 Pa, with resistance to ammonia, salt mist, and PID degradation. Eliminating the rear EVA backsheet removes the primary moisture ingress path, statistically reducing microcrack risk and encapsulant discoloration over the module lifetime. ## Cons - **Not on BNEF Tier-1 list** - Heckert Solar does not appear on the BNEF Tier-1 module manufacturer list (Q1 2026), which is required by many banks for financing projects above 1 MWp. For residential prosumer installations this is irrelevant, but it may be a blocker for commercial projects with institutional debt financing where counterparties mandate BNEF-listed suppliers. - **Single power variant in series (445 Wp)** - The ZEUS 1.0 series offers only one power variant at 445 Wp, with no higher or lower options. Unlike Q-Cells Q.TRON BLACK — available across a wider power range (405–445 Wp) — the lack of choice may limit string optimization flexibility and compatibility with inverters featuring a narrow MPPT window. ## About this series The Heckert Solar ZEUS 1.0 series was designed for maximum energy yield in situations where long-term predictability is key - whether on residential rooftops or in commercial installations. These are **bifacial glass-glass modules** that can utilize light from both sides, including the rear, making them particularly effective in environments with reflected light from bright surfaces, gravel, or roofing membranes. The use of **n-type TOPCon cells** helps to minimize typical performance losses over time and improves performance in challenging conditions. In practice, the ZEUS 1.0 addresses two common problems for investors: reduced power output in hot weather and energy shortages on cloudy days. This is achieved through a **low temperature coefficient** and good performance in low-light conditions. Furthermore, the double-glass construction increases resistance to loads and microcracks, resulting in **high durability and stability**. This is a sensible choice for those who want better quality than standard glass-film modules, without compromising on aesthetics and reliability. ## Notable figures - At 22.3% efficiency, this panel is on par with typical \*\*TOPCon 400-450W\*\* modules - Power density of 222.7 W/m² matches the \*\*TOPCon 400-450W\*\* median - Temperature coefficient of -0.29%/°C matches the \*\*TOPCon 400-450W\*\* median - At 24.5 kg, this panel is 2.5 kg heavier than the \*\*TOPCon 400-450W\*\* median (22.0 kg) - more demanding for installation crews - Bifaciality factor of 80% can add 4-12% extra yield with reflective mounting surface ## Questions ### What is TOPCon cell technology in the Heckert Solar ZEUS 1.0 and how does it compare to PERC? The n-type TOPCon cells used in the ZEUS 1.0 series degrade more slowly than conventional p-type PERC cells. This means the panel will produce more energy after 10 or 20 years of operation. TOPCon also performs better in low-light conditions and at high temperatures, resulting in a measurably higher annual energy yield without the premium cost of HJT technology. ### How much extra energy does the bifacial design of the Heckert Solar ZEUS 1.0 actually generate? The bifacial glass-glass construction can deliver up to approximately 25% additional energy compared to a monofacial module of the same rated power of 445 Wp. The rear side captures light reflected from bright surfaces such as gravel, white roofing membrane, or snow. The actual gain depends on surface albedo and mounting angle, but additional yield is measurable even in typical rooftop installations. ### What warranty does the Heckert Solar ZEUS 1.0 series include and what does it cover? Heckert Solar provides a 30-year product warranty covering material and workmanship defects, plus a separate 30-year power output guarantee. This is one of the longest warranties available in the residential solar market and reflects the manufacturer's confidence in the glass-glass construction's longevity. The investor is protected against both physical failure and unexpected performance loss. ### Does the ZEUS 1.0 lose significant power on hot days and how does it handle heavy snow in winter? The ZEUS 1.0 features a low temperature coefficient, meaning it loses less power during summer heat waves compared to standard PERC modules. In winter, the glass-glass construction is rated for snow loads up to 8,100 Pa and wind loads up to 2,400 Pa. The module performs reliably in both warm Mediterranean climates and Central European winters with heavy snowfall. ### Is the Heckert Solar ZEUS 1.0 series suitable for a sloped residential roof? Yes, the 445 Wp ZEUS 1.0 is designed for both residential rooftop and commercial installations and fits standard mounting systems. It is worth confirming with the installer that the roof structure can support glass-glass modules, which are slightly heavier than conventional glass-foil panels at approximately 26–28 kg each. ### Is Heckert Solar a reliable manufacturer and where are the ZEUS 1.0 modules made? Heckert Solar is a German company with a long track record in the photovoltaic industry, headquartered in Germany. European quality oversight combined with IEC 61215 and IEC 61730 certifications confirm the manufacturer's credibility. The brand is recognized for durable modules aimed at customers who prioritize predictable, long-term system performance over decades. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/datenblatt-zeus1-0-445wp-7295d3b0cd5a.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [AIKO AIKO-A495-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a495-mce54mw) | 495 W | +50 W, lighter, +2.5 pp | | [AIKO AIKO-A490-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a490-mce54mw) | 490 W | +45 W, lighter, +2.2 pp | | [Suntech STP-NT11/48QGSF-490](https://comparepv.com/panel/suntech-stp-nt11-48qgsf-490) | 490 W | +45 W, lighter, +2.2 pp | | [JA Solar JAT54S40-485/LR](https://comparepv.com/panel/ja-solar-jat54s40-485-lr) | 485 W | +40 W, lighter, +2.0 pp | | [AIKO AIKO-A485-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a485-mce54mw) | 485 W | +40 W, lighter, +2.0 pp | | [Longi Solar LR7-54HJD-495M](https://comparepv.com/panel/longi-lr7-54hjd-495m) | 495 W | +50 W, cooler, +2.0 pp | | [AIKO AIKO-A485-MAH54Mw](https://comparepv.com/panel/aiko-aiko-a485-mah54mw) | 485 W | +40 W, lighter, +2.0 pp | | [Heckert Solar ZEUS 1.1 440WP Full Black](https://comparepv.com/panel/heckert-solar-zeus-1-1-440wp-full-black) | 440 W | Lighter, -0.3 pp | | [Longi Solar LR7-54HJD-510M](https://comparepv.com/panel/longi-lr7-54hjd-510m) | 510 W | +65 W, cooler, +2.7 pp | | [Longi Solar LR7-54HJD-505M](https://comparepv.com/panel/longi-lr7-54hjd-505m) | 505 W | +60 W, cooler, +2.4 pp | | [Longi Solar LR7-54HJD-500M](https://comparepv.com/panel/longi-lr7-54hjd-500m) | 500 W | +55 W, cooler, +2.2 pp | | [Talesun CIPRO-TN9C54M-500W](https://comparepv.com/panel/talesun-cipro-tn9c54m-500w) | 500 W | +55 W, lighter, +2.2 pp | --- Source: https://comparepv.com/panel/heckert-solar-zeus-1-0-445wp Not in this file, on the page: the I-V and temperature curves lifted from the manufacturer's datasheet, a thirty-year output simulator, a bifacial gain calculator and alternatives filtered by how closely they match these dimensions.