Your solar panel is recyclable. Who pays the bill?

A solar panel spends decades turning sunlight into electricity. At the end of its life, it performs one final conversion: from an asset into somebody’s invoice.

We are much better at discussing the first conversion.

At a recycling plant, one customer wants a problem taken away. Another wants a useful material delivered. Serving both profitably is where the opportunity becomes interesting.

What the modelling says, and what it does not

The second has become more interesting. A Nature paper published on 12 August models 297–402 million tonnes of cumulative photovoltaic waste by 2060. In its scenarios, global recycling economics turn positive between 2035 and 2040. The study focuses on crystalline-silicon modules and finds substantial potential economic and climate benefits from well-designed recycling. Its results depend on assumptions about material prices, technology and regional conditions.

That is a model of a global system. An individual recycler has its own customers, fees, costs and contracts. Treating the date as a prediction of when every recycling company becomes profitable would be a peculiar way to prepare a business plan.

Four measures, and only one of them is a business

There are encouraging signs of companies doing the hard work. On 11 August, Comstock announced that its solar-recycling system had processed panels through all production stages. The line’s stated capacity is 100,000 tons per year. The same release described a forthcoming milestone of continuous operation at 25% of rated capacity. Those are different measures: equipment rating, successful testing and sustained output. Keeping them separate gives us a much more useful picture of progress.

Also on 11 August, OnePlanet reported a recovered silicon stream above 95% purity, carrying approximately 1% silver. Its announcement described production targeted for 2027 and further refining development targeted for 2030. The material is an intermediate feedstock; calling it finished solar-grade silicon or refined silver would skip a fairly consequential industrial step. These are company-reported results and plans.

Both announcements deserve attention. They also show why a single impressive percentage tells a buyer so little.

Recovery yield measures how much material comes out. Purity describes what is in it. Throughput tells us how much the plant can process over a specified period. Margin tells us whether the transaction leaves enough money to keep doing it.

A forklift driver cannot collect the fourth simply by delivering the first three.

In my book, Commercializing Clean Technology, I use the established distinction between creating value, delivering it and capturing enough of it to sustain a business. Solar recycling gives that distinction a physical form: a pallet of retired panels, a processing line, a buyer’s material specification and an invoice.

Recovering useful material creates value. Getting the right material to the right customer, consistently, delivers it. The commercial terms determine how much the recycler retains. Each part needs deliberate design.

A deliberately simplified example

Consider a deliberately simplified example, with invented figures per tonne, not industry benchmarks. A recycler earns a €200 processing fee and €160 from recovered materials. Variable processing costs are €230; transport and residue handling cost another €70. That leaves €60 before fixed overhead, financing and tax.

If the material revenue falls to €120, that contribution shrinks to €20. Nothing about the recovery percentage has changed. The chemistry can be performing beautifully while the cash gets uncomfortable.

The exercise is elementary. That is why it belongs before the expansion announcement.

Feedstock and offtake are both part of the product

Plant utilisation adds another problem. Rent, core staffing and debt payments do not politely fall in proportion when fewer panels arrive. A forecast of millions of tonnes retiring somewhere in the world is limited comfort when your facility needs dependable deliveries within an economical collection radius next Tuesday.

For a recycler, feedstock security is part of the product. Contracts need to establish whose panels will arrive, in what condition, at whose transport cost, and on what schedule. A decommissioning estimate becomes more useful when someone accepts responsibility for delivering against it.

The other end of the line deserves equal attention. A potential customer saying “interesting material” has not yet agreed to buy it. The specification needs to cover contaminants, consistency, sampling, rejection and pricing. Further refining can be perfectly sensible, provided its cost, yield loss and commercial owner appear in the plan.

This is where I would spend more time with the sales team. Ask the materials buyer what would make the next shipment unacceptable. That answer may improve the business faster than another decimal place on the recovery slide.

There is already a useful example of commercial responsibility being made explicit. First Solar’s Recycling Service Agreements place removal, packaging and delivery to its recycling centre with the module owner, with service pricing described on a per-module basis. The company separately describes a prefunded programme for pre-2013 customers. First Solar uses a different, thin-film technology, so its recovery economics should not be transferred to crystalline-silicon panels. The relevant lesson is the clarity about who does what and who pays.

Environmental benefits can extend well beyond the parties signing the contract. Communities and future users of materials may benefit without paying the recycler directly. A workable business needs a way to fund the service through an identifiable buyer or funding mechanism. “Good for society” is a strong reason to build a system. It is a difficult name to put in the customer field.

The same issue appears in water reuse and resource recovery. A treatment process may produce water that a nearby factory could use. The commercial work includes agreeing the delivered quality, connection cost, availability, price and responsibility when the process stops. Someone also has to finance the period between building the asset and collecting its revenue.

Five commitments on one page

For the next solar-recycling project, I would ask the team to put five commitments on one page:

1. Supply: committed volumes, panel types, delivery dates and responsibility for collection.
2. Service payment: the paying customer, the fee and what that fee covers.
3. Material sales: the buyer’s specification, acceptance test and pricing terms.
4. Operation: demonstrated throughput, expected utilisation and responsibility for downtime or rejected output.
5. Cash: payment dates and the funding needed if deliveries, ramp-up or customer payments run late.

Then test the page under lower material prices and fewer incoming tonnes. A project that survives those assumptions has a more persuasive story for customers and funders. A project that fails has identified work to do while changes are still relatively cheap.

This is a substantial opportunity for equipment suppliers as well as plant owners. Better separation matters. So do process control, dependable service, output verification and contracts that help buyers commit. The supplier who understands the recycler’s cash cycle can design a more useful offer than the supplier who stops at machine performance.

Solar recycling deserves that level of commercial attention. We should be making it easier to collect panels, recover useful materials and build businesses around the service.

The circular economy will still need trucks. It would help if everyone knew who was paying for them before they arrived.

---

The per-tonne figures in the worked example are invented for illustration and are not industry benchmarks. Company results, capacities and target dates are as reported by the companies themselves and have not been independently verified. The commercial argument is the author’s analysis rather than a claim made by any source cited.