--- title: "Heckert Solar ZEUS 3.0+ 108 485WP PERFORMANCE 485W Solar Panel - Specs & Review | ComparePV" description: "Heckert Solar ZEUS 3.0+ 108 485WP PERFORMANCE 485W solar panel. Specs: 24.30% efficiency, Monocrystalline cells." source: "https://comparepv.com/panel/heckert-solar-zeus-3-0-108-485wp-performance" updated: 2026-09-11 --- # Heckert Solar ZEUS 3.0+ 108 485WP PERFORMANCE Space saver, no clear weak spot 156 panels in the segment Back Contact 450-500 W ## Identity - **Manufacturer:** Heckert Solar - **Model:** ZEUS 3.0+ 108 485WP PERFORMANCE - **Series:** ZEUS 3.0+ Performance - **Rated power:** 485 W - **Cell technology:** Back Contact - **Bifacial:** yes ## How it compares Compared against segment Back Contact 450-500 W (156 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 485 W | 475 W | Strong - top 21% | | | Module efficiency | 24.30% | 23.50% | Strong - top 7% | 131 | | Power density | 242.7 | 235.2 | Strong - top 6% | 140 | | Temperature coefficient | -0.260 | -0.260 | Typical | 511 | | Weight (kg) | 24.2 kg | 23.5 kg | Typical | | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 24.30% | 23.50% | Strong - top 7% | 131 | | Power density | 242.7 | 235.2 | Strong - top 6% | 140 | | Temperature coefficient | -0.260 | -0.260 | Typical | 511 | | Weight per kWp | 49.9 | 48.0 | Typical | 3,275 | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Strengths - **242.7 watts per square metre** - Top 6% of the Back Contact 450-500 W segment, against a median of 235.2. Ranked 140th in the whole database. - **24.30% module efficiency** - Top 7% of the Back Contact 450-500 W segment, against a median of 23.50%. Ranked 131st in the whole database. - **Best for:** Residential, commercial and hot-climate. ## Specification ### Electrical - **Rated power (Pmax):** 485 W - **Efficiency:** 24.30 % - **Voltage at Pmax (Vmp):** 34.60 V - **Current at Pmax (Imp):** 14.02 A - **Open-circuit voltage (Voc):** 41.00 V - **Short-circuit current (Isc):** 14.84 A - **Max system voltage:** 1500 V ### Temperature - **Temperature coefficient of Pmax:** -0.260 %/degC - **Temperature coefficient of Voc:** -0.220 %/degC - **Temperature coefficient of Isc:** 0.050 %/degC - **NOCT:** 45 degC ### Cell and construction - **Cell type:** Monocrystalline - **Cell technology:** Back Contact - **Cell count:** 108 - **Bifacial:** yes ### Physical - **Length:** 1762 mm - **Width:** 1134 mm - **Thickness:** 30 mm - **Weight:** 24.2 kg - **Area:** 2.00 m2 - **Power density:** 242.7 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:** 412 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 131 of 14005 | | Power density | 140 of 14005 | | Temperature coefficient | 511 of 14005 | | Weight | 3275 of 14005 | | Warranty | 21 of 14005 | ## Pros - **Highest efficiency in the segment** - Efficiency of 24.3-24.5% outperforms comparable 490 Wp modules - Solar-Fabrik Mono S4 Halfcut BC (24%), Renesola RS4-490NX-E1 (22.71%), and Silfab HN (20.9%). This means less roof area is needed to reach the same installed power. - **Back-contact (ABC) technology, no busbars** - The absence of visible electrodes and busbars on the front side increases active working cell area and reduces hot-spot risk under partial shading compared to conventional half-cut cells with front busbars. - **43.6% bifaciality in a glass-glass design** - A bifaciality factor of up to 43.6% combined with a double-glass construction captures light reflected off the ground, boosting real-world energy yield without increasing the installation footprint - particularly beneficial on flat roofs and facades with bright surroundings. - **30-year product and power warranty** - Heckert Solar backs the series with a uniform 30-year product and performance warranty, longer than the standard 25/30-year terms offered by many Tier-1 manufacturers, lowering the projected levelized cost of energy (LCOE). - **German manufacturer with 30+ years of history** - Heckert Solar has operated since 1992 and manufactures in Germany, an important factor for buyers seeking proven European build quality and local service support. ## Cons - **Short market track record** - The ZEUS 3.0+ Performance series launched in 2025, meaning there is no multi-year, independent field data on actual power degradation compared to longer-established competitor models. - **Heavier glass-glass module weight** - The glass-glass construction (2x2 mm) results in a module weight of about 24.2 kg at 1762x1134 mm dimensions, more than typical glass-polymer modules of similar power - roof structural load capacity should be verified before installation. ## About this series The ZEUS 3.0+ Performance series is Heckert Solar's answer to installations where maximizing power density on limited roof space is the priority. The panels use **back-contact (ABC) technology**, meaning no visible electrodes or busbars sit on the front cell surface - the entire area works more efficiently, and the module handles partial shading better, reducing the risk of hot spots. A **glass-glass (double glass)** construction combined with **bifacial** design captures additional radiation reflected off the ground, boosting real-world energy yield without increasing the installed footprint. This solution suits both residential and commercial investors who expect strong mechanical durability and stable performance under demanding climate conditions, including high irradiance and elevated temperatures. The Performance variant offers architectural flexibility while retaining the parameters of the flagship ZEUS model. The manufacturer backs the module with a **long warranty period**, translating into lower lifecycle energy cost (LCOE) and greater investment security for customers seeking proven German build quality. ## Notable figures - 24.3% module efficiency - 0.8pp better than the \*\*Back Contact 450-500W\*\* median of 23.5% - At 242.7 W/m² power density, this panel generates 7.5 W/m² more per unit area than \*\*Back Contact 450-500W\*\* median (235.2 W/m²) - Temperature coefficient of -0.26%/°C matches the \*\*Back Contact 450-500W\*\* median - Bifaciality factor of 44% can add 2-7% extra yield with reflective mounting surface - In the top 1% for efficiency among all Back Contact panels ## Questions ### What is back-contact (ABC) technology in the ZEUS 3.0+ Performance panels and how does it differ from classic PERC panels? In back-contact (ABC) technology, the electrodes and busbars are moved to the rear side of the cell, so the front surface is fully active optically. This allows the ZEUS 3.0+ Performance module to reach efficiency up to about 24.5% and handle partial shading better than classic PERC panels, where visible busbars and metallization fingers reduce the active surface area. ### Are ZEUS 3.0+ Performance panels suitable for a single-family home roof or more for commercial installations? The series works well for both. High power of up to 490 Wp per panel allows a large system capacity on a limited residential roof area, while stable performance at high temperatures and a solid glass-glass construction also make it attractive for commercial installations and rooftop solar farms. ### What does the bifacial design of the ZEUS 3.0+ Performance modules mean, and is it worth paying extra for? The module is bifacial - the rear side also generates energy from light reflected off the ground, such as a light-colored roof or gravel. The manufacturer states a bifaciality factor of up to about 43%, which with proper mounting (e.g., on a raised structure with clearance) can boost real energy yield without increasing the installation footprint, so the extra cost typically pays off over the long run. ### What warranty comes with Heckert Solar ZEUS 3.0+ Performance panels? The manufacturer covers the ZEUS 3.0+ Performance modules with a 30-year product warranty and a 30-year power warranty. This is one of the longer warranty periods on the market and translates into a lower LCOE (levelized cost of energy), an important factor when choosing panels meant to perform for decades. ### Do ZEUS 3.0+ Performance panels perform well in summer, under strong sunlight and high temperatures? Yes, the glass-glass construction combined with back-contact technology improves heat dissipation and limits power loss at high temperatures compared to standard glass-backsheet modules. Additionally, the absence of visible busbars on the front side reduces the risk of hot-spot formation, which matters under intense, prolonged sun exposure. ### How does the Performance version differ from the flagship ZEUS 3.0+ model? The Performance version retains the key technical parameters of the flagship ZEUS model - the same ABC technology, glass-glass construction, and bifaciality - while offering greater architectural flexibility and availability in different color variants. It's a solution for customers who want the flagship's proven parameters with a build better matched to a specific project. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/202602_Datenblatt_Zeus30_white_485-490Wp_DE_web-1a8d9954ba28.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [Longi Solar LR7-54HJD-510M](https://comparepv.com/panel/longi-lr7-54hjd-510m) | 510 W | +25 W, cooler, +0.7 pp | | [AIKO AIKO-A495-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a495-mce54mw) | 495 W | +10 W, lighter, +0.5 pp | | [Longi Solar LR7-54HJD-505M](https://comparepv.com/panel/longi-lr7-54hjd-505m) | 505 W | +20 W, cooler, +0.4 pp | | [AIKO AIKO-A490-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a490-mce54mw) | 490 W | Lighter | | [Longi Solar LR7-54HJD-500M](https://comparepv.com/panel/longi-lr7-54hjd-500m) | 500 W | +15 W, cooler | | [Talesun CIPRO-TN9C54M-500W](https://comparepv.com/panel/talesun-cipro-tn9c54m-500w) | 500 W | +15 W, lighter | | [Heckert Solar ZEUS 1.1 440WP Full Black](https://comparepv.com/panel/heckert-solar-zeus-1-1-440wp-full-black) | 440 W | -45 W, lighter, -2.3 pp | | [Heckert Solar ZEUS 1.1 445W Black Frame](https://comparepv.com/panel/heckert-solar-zeus-1-1-445w-black-frame) | 445 W | -40 W, lighter, -2.0 pp | --- Source: https://comparepv.com/panel/heckert-solar-zeus-3-0-108-485wp-performance 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.