The Solar Industry Has a Recycling Problem Nobody Wants to Talk About
In our collective enthusiasm for renewable energy, Australia now has installed solar panels on roughly one in three homes. This is one of the most impressive renewable energy stories in the world and a case study in how effective it can be as an investment across the nation.
Yet for all the conversation about clean energy, remarkably little is said about what happens when those panels stop working — whether panels, inverters, or isolators.
The answer, currently, is mostly landfill. Or, in a slightly better case scenario, a pallet in a warehouse somewhere. Either way, though, there is a slow accumulation of broken equipment that nobody quite knows how to handle. It is for this reason that the recycling conversation in solar is long overdue, and the industry needs to have it honestly.
The Scale of What Is Coming
The oldest residential solar systems in Australia are reaching the end of their useful lives. Panels are rated for 25 to 30 years, and the first wave of mass installations is now approaching that threshold.
As of 2023 — the most recent official figure available — Australia recycled only 17 per cent of solar panel components, specifically the aluminium frame and junction box. The remaining 83 per cent of a panel’s materials, including glass, silicon, and polymer back sheeting, are not currently recyclable in Australia. More recent industry data suggests the recycling rate has remained broadly consistent at around 15 to 17 per cent.
A scoping study from UNSW Sydney projects cumulative decommissioned panel volume reaching one million tonnes by 2035, with annual waste potentially hitting 100,000 tonnes by the end of the decade.
Those are not abstract numbers. They represent a material challenge the industry is only beginning to reckon with. None of this is an argument against solar. The technology delivers real and lasting value. But confronting the recycling question honestly is precisely what will allow that value to hold up over time.
Why Recycling Is Harder Than It Sounds
Solar panels contain genuinely valuable materials. Silver, copper, aluminium, and silicon all have real market value. In theory, recovering them makes economic sense. In practice, the economics are far more complicated.
Recycling costs approximately $28 per panel, roughly six times the cost of sending end-of-life panels to landfill, which sits at around $4.50 per panel.
Glass is the primary problem. It makes up around 70 per cent of a panel’s weight, and the market for recycled solar glass in Australia is extremely limited. Recycled glass currently goes mainly to road fill as a sand substitute, because Australia lacks a domestic solar manufacturing industry that would give it higher-value use.
Silver tells the opposite story. Prices are high and there is genuine interest in recovery. But that does not change the logistics. Recyclers working at commercial scale typically need large, consolidated volumes before collection becomes viable. Four to five pallet loads is the threshold at which some operators will dispatch a truck. A small commercial site or residential owner replacing a handful of panels has almost no practical pathway.
The problem is both volume and geography. When a regional tip recently refused to accept 370 decommissioned panels, citing insufficient capacity, the owner faced a stark choice: pay enormous fees to a recycling facility in the nearest capital city, plus significant freight charges to get the panels there. For regional and rural asset owners, the tyranny of distance turns a difficult situation into a genuinely punishing one.
And critically, panels cannot be refurbished. Unlike many commercial assets, a degraded or damaged solar panel cannot be reconditioned and returned to service. Once a panel is out, the only options are recycling, storage, or disposal.
Inverters Are a Separate Problem
Much of the recycling conversation focuses on panels, but inverters deserve equal attention.
Inverters have a significantly shorter lifespan than panels, typically 10 to 12 years, meaning most systems will go through at least two inverters across the life of the installation. Yet end-of-life pathways for inverters are even less developed than for panels.
Older transformer-based inverters can fetch some scrap metal value. Newer models are processed as general e-waste, with metals and circuit board assemblies recovered at modest yields. There is no meaningful high-value material recovery equivalent to what is theoretically possible with panels. For most asset owners, disposing of an inverter responsibly means paying for e-waste processing and receiving nothing in return.
The industry rarely acknowledges this. It should.
The Regulatory Picture Is Fragmented
State governments have begun acting, but unevenly. Victoria banned solar panels from landfill in July 2019. South Australia and the ACT have imposed restrictions on e-waste disposal. Western Australia began implementing e-waste regulations in July 2024, with a landfill ban for solar panel waste anticipated in future phases.
A national pilot program is now planned, with the Federal Government’s scheme proposed to commence mid-2026. It aims to collect up to 250,000 panels from around 100 sites and gather data to inform a future national framework. It is a welcome start. It will not come close to covering annual waste volumes.
If other states follow Victoria’s lead on landfill bans, the resulting volume of material entering the recycling stream could help operators achieve the economies of scale that currently make the sector commercially marginal. Regulatory alignment is, in many ways, the precondition for a viable recycling industry.
The Conversation Needs to Shift
For solar asset owners and the installers who service them, waiting for recycling infrastructure to catch up is a passive strategy with real costs.
The more productive conversation is about maintenance and about extending the useful life of solar system componentry before end-of-life questions even arise. Every panel that fails prematurely, every inverter replaced ahead of schedule, every fault left unaddressed until it causes broader damage represents waste the industry created before the end-of-life question even arose.
Proper maintenance extends asset life. It preserves the integrity and lifespan of all system componentry. Identifying an earth fault early, catching potential water ingress before it takes hold, addressing degraded connections — these are the interventions that can save a panel, an isolator, or an inverter from total failure. Componentry in good condition is significantly easier to process when recycling capacity eventually reaches scale. Damaged panels contaminate material streams and reduce recovery yields. The condition of the system at end of life matters, both environmentally and economically.
This is why maintenance should be framed as an environmental responsibility, not only a financial one. Every additional year of reliable performance is a year in which recycling technology continues to develop. Every fault caught early is material kept out of an already-strained waste system.
An Honest Conversation
The solar industry has been built on an optimistic story, and that optimism has been largely warranted. But credibility in the clean energy sector depends on acknowledging hard truths alongside the wins.
Recycling solar panels and inverters at scale is a real and pressing challenge. The infrastructure is underdeveloped, the economics are difficult, and the regulatory framework is still being built. Acknowledging that is the first step toward solving it.
In the meantime, the most responsible thing an asset owner or installer can do is look after what they have. That is practical. That is honest. And in the current landscape, it is also the most environmentally sound position available.