Solar Panel Recycling in the UK: What Happens to Your Panels at End of Life?

Solar panels were being installed on UK rooftops in significant numbers from around 2010 onwards, driven by the Feed-in Tariff scheme. That means the first generation of domestic solar PV is now approaching or into the 20–25 year operating window that manufacturers typically quote as panel lifespan. It’s a fair question to ask: when these panels eventually stop producing, what happens to them?

The answer is more regulated than you might expect, and more interesting than “they end up in landfill” — which is the instinctive assumption many people make.

Are solar panels covered by WEEE regulations?

Yes, and this is worth understanding. Since 2014, solar panels in the UK and EU have been covered by the Waste Electrical and Electronic Equipment (WEEE) Regulations. This means producers — manufacturers and importers — have a legal responsibility to fund the collection, treatment, and recycling of solar panels at end of life, and to register with a Producer Compliance Scheme.

In practice this means homeowners should not have to pay to dispose of solar panels. The producer compliance obligation means that panels should be collected and recycled at no cost to the householder, provided the panels were placed on the market after 2014. For older panels installed under the original Feed-in Tariff scheme, the position is slightly more complex — some manufacturers have absorbed legacy products into compliance schemes voluntarily, while others haven’t. It’s worth checking directly with your installer or the panel manufacturer.

The MCS (Microgeneration Certification Scheme) is worth mentioning here too. MCS-certified installers have obligations around product specification and compliance, and if your system was installed by an MCS-accredited company, they should be able to advise on end-of-life arrangements.

What does solar panel recycling actually involve?

A standard silicon-based solar panel is about 65–75% glass by weight, with the remainder being aluminium frame, copper wiring, a polymer backsheet, and the silicon photovoltaic cells themselves. The silver used as a conductor in the cells, and the small amounts of indium and gallium in thin-film panels, are also worth recovering.

The recycling process typically starts with removing the aluminium frame and junction box — those are straightforward and can go into standard metal recycling streams. The trickier part is separating the glass from the encapsulant (usually EVA — ethylene vinyl acetate) and recovering the silicon.

There are two main approaches. Thermal processing uses heat to burn off the polymer layers, leaving the glass and silicon recoverable — it works but isn’t particularly energy-efficient. Chemical processing uses solvents to dissolve the encapsulant without destroying the cells, which allows higher-purity silicon and sometimes intact cells to be recovered. The recovered silicon can be reused in new panels or in other applications; recovered glass is typically downcycled into lower-grade applications like insulation.

Glass is currently the easiest material to route back into productive use. Silicon recovery at high purity is more challenging and the economics depend on commodity silicon prices. Silver recovery is consistently worthwhile given current silver prices.

How close is a circular solar economy?

Closer than it was, but not there yet. The volume of solar panels reaching end of life globally is set to grow significantly through the 2030s, which is creating a commercial incentive to develop better recycling infrastructure. Several UK and European firms — including Reclaim PV Recycling and Reiling GmbH — are building dedicated solar recycling capacity.

The honest picture is that today’s solar panel recycling mostly achieves material recovery at moderate efficiency, rather than the high-value closed-loop recycling that would genuinely make PV a circular technology. The glass and aluminium are relatively well captured; silicon recovery rates vary; silver and other high-value components are sometimes lost in less sophisticated processes.

The next generation of recycling approaches — including delamination processes that recover intact cells for refurbishment — could significantly improve this, and there’s active research in both the UK and continental Europe.

What should you actually do when your panels give out?

If your panels are failing — dropping below acceptable output thresholds, physically damaged, or genuinely at end of life — the first step is to contact your original installer if they’re still trading. Accredited installers should be able to facilitate WEEE-compliant disposal.

If your installer no longer exists, the panels’ manufacturer is the next port of call. Most major manufacturers (SunPower, JA Solar, REC, and others with UK market presence) participate in producer compliance schemes and have collection processes.

As a last resort, local authority household waste recycling centres (HWRCs — your local tip) can take WEEE items including solar panels, though their handling of large panel volumes varies by authority. It’s worth calling ahead.

One practical note: panels that are old but still partially functional aren’t necessarily scrap. A panel producing 70% of its original output is still generating electricity, and there’s a small but growing secondary market for serviceable used panels for off-grid and rural electrification applications.

The UK’s solar recycling infrastructure is building in anticipation of volume that’s coming regardless — the question is whether the economics work out before a large cohort of first-generation panels arrives at landfill. Based on current investment in the sector, the answer looks likely to be yes. But do check your panel manufacturer’s compliance arrangements before your installation reaches that point — WEEE obligations are real, and so is your entitlement to free disposal.