Solar panels are a symbol of clean energy, but how environmentally friendly are the materials they are made from? This question is becoming increasingly relevant now that large-scale PV installations on commercial rooftops are becoming commonplace. The production of traditional panels entails a significant environmental impact, from the extraction of raw materials to end-of-life processing. For project developers, property managers and installers who take sustainability targets seriously, understanding the materials used in solar panels is therefore not a minor issue, but a strategic consideration.
The sector is set to gain momentum in 2026. New generations of sustainable solar panels offer not only better environmental performance, but also practical advantages in terms of weight, installation speed and circularity. This article explains where the environmental impact of conventional panels comes from, what alternatives are available, and what this means for large-scale commercial projects.
Most solar panels on the market consist of a combination of glass, aluminium and silicon cells, supplemented by plastic films and metal connectors. Each of these materials has its own environmental footprint. Glass is heavy and energy-intensive to produce. Aluminium requires large amounts of electricity during primary production, which in many countries still relies largely on fossil fuels. The carbon footprint of solar panels therefore begins well before a panel generates even a single watt.
Furthermore, traditional panels are difficult to recycle at the end of their lifespan. Their layered structure, in which glass, polymer films and silicon cells are fused together, makes separation labour-intensive and costly. In practice, many end-of-life panels still end up in incinerators or on landfill sites. This is a systemic problem for a sector that positions itself as sustainable. Furthermore, some conventional modules contain PFAS – substances that are persistent in the environment and whose harmful effects are becoming increasingly well documented.
A new generation of PV modules replaces glass and aluminium with thermoplastic polymers, resulting in significantly better environmental performance. Polymer-based panels are up to 50% lighter than their conventional counterparts and require less energy and raw materials during production. This translates directly into a lower carbon footprint over the panel’s entire life cycle.
Solarge has further developed this technology into a production line that is completely free of glass, aluminium and PFAS. The SOLO and SOLO Ultra Low Carbon panels are made from a thermoplastic composite material developed specifically for the PV sector. The production process delivers a CO₂ reduction of up to 80% compared with traditional glass modules, a difference that is becoming increasingly significant for ESG reporting and sustainability certification. Furthermore, the panels are unbreakable and have been extensively tested for resistance to hail, snow and wind, with an expected lifespan of over 25 years.
Environmentally friendly materials in solar panels are only truly valuable if they can also be processed responsibly at the end of their life cycle. Circularity goes beyond recyclability on paper: it requires a system in which material flows are actually tracked and recovered.
Thermoplastic polymers have a fundamental advantage in this respect over the thermosetting resins used in traditional panels. Once cured, thermosetting resins cannot be melted down or reshaped, which makes recycling difficult. Thermoplastic materials, on the other hand, can be remelted and reprocessed, enabling a true circular economy. Solarge’s panels are 100% recyclable and designed with material reuse in mind.
Traceability is an additional dimension that is becoming increasingly important in the sector. Every Solarge panel comes with its own C_passport®, a digital materials passport that provides full transparency regarding the materials used and reused. For organisations that must comply with strict ESG reporting standards or due diligence obligations within the supply chain, this is a concrete and verifiable tool, not just a marketing promise.
The origin of a solar panel has a direct impact on its overall environmental performance. Transport distances, production methods and the energy mix of the country of manufacture together account for a large proportion of a PV module’s life-cycle emissions.
Solarge manufactures its panels in a modern 7,000 m² factory in Weert, the Netherlands. This decision to produce locally is not only strategic from the point of view of security of supply, but also has a direct environmental dimension. Shorter transport chains mean lower emissions per panel delivered. Furthermore, production in the Netherlands utilises an energy mix that is becoming increasingly green, which further reduces the carbon footprint of the production process. By operating completely independently of foreign supply chains, Solarge also avoids the risks associated with opaque production chains in regions with less stringent environmental standards.
For project partners who wish to demonstrate their commitment to sustainable procurement, the origin of the panel is therefore a relevant factor alongside the technical specifications. European production offers a level of transparency that global supply chains rarely provide.
For project developers and installers working on large-scale rooftop installations at logistics centres, distribution centres or industrial buildings, environmentally friendly materials translate into tangible operational and strategic benefits. Lightweight solar panels reduce the load on the roof, making installation possible on buildings that cannot support the weight of traditional glass modules. This significantly expands the potential project portfolio.
Faster installation – a direct result of the lower weight and simpler assembly – reduces labour costs per project and shortens lead times. At the same time, circular solar panels with a demonstrably low carbon footprint provide a strong selling point for clients who need to account for their ESG targets to shareholders, financiers or regulators.
The choice of materials for solar panels is therefore not merely a technical detail, but a decision that impacts project feasibility, sustainability reporting and long-term value. Solarge supplies its lightweight, circular panels directly to commercial property owners and installers, with a bespoke assessment based on location, roof orientation and shading. As sustainability requirements in the construction sector become increasingly stringent, the materials from which a panel is constructed are becoming an ever more decisive selection criterion.
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