The Total Cost of Owning Solar
Most calculators show you the savings. This one shows you the bill you'll get in 25 years — when someone has to climb onto your roof and take everything down.
💰 The Hidden Bill
Decommissioning a 5 kWp system costs €1,000–3,500 in Europe. Installers never mention it. EU eco-fees cover ~20%. You pay the rest. See the research →
🧱 300+ kg of Future Waste
Panels, mounting, cabling, inverters — hardware that becomes your responsibility. Recycling is often loss-making for LFP batteries and glass-heavy panels. Why →
📉 Adjusted Payback
When you add waste costs to the upfront price, your payback gets longer. This calculator shows both numbers side by side — so you can decide if the gap matters to you.
Scenario presets from our lifecycle research. You can fine-tune every number below.
Your System
A 5 kWp system is ~11 panels (450W each). That's 220 kg of glass, aluminum, and silicon sitting on your roof for 25 years.
Plus mounting: ~60 kg of aluminum rails and clamps. Plus cabling: ~20 kg of copper wire. Total: ~300 kg of hardware.
A 10 kWh battery contains ~120 kg of lithium, iron, phosphate, and copper. At end-of-life, this is the hardest and most expensive component to recycle. Here's why.
Historical EU average is ~3%/yr. A conservative 2% is the default. Higher growth improves solar payback.
Fine-tune
The decommissioning contractor handles everything: removal, transport, and disposal. Adjust based on local quotes.
Reality check: US contractors charge $200–500 per panel (Angi 2026). EU WEEE eco-fees (€1–5/panel) cover only ~20% of real costs. For a 5 kWp system (~11 panels), honest decommissioning is €1,000–3,500. See the research →
What Installers Show You
Without waste costs
The Honest Number
Includes end-of-lifeThis is the bill installers don't mention. It comes due in 25 years — discounted to today's money above.
| What you pay for | Cost | Credit | Net |
|---|---|---|---|
| Panel disposal (— panels, — kg) | — | — | — |
| Battery disposal (— kWh, — kg) | — | — | — |
| Inverter disposal (— units, — kg) | — | — | — |
| Transport (— total) | — | — | — |
| Decommissioning (removal from roof) | — | — | — |
| Gross cost | — | — | — |
| Present value of waste cost (discounted @ 6% over 25 yr) | — | ||
How this works: The contractor charges disposal fees for each component. If any material is recycled, you get a credit — but only ~80% of panels actually reach a recycler in practice. The net is what you pay. We then discount that future bill back to today.
The waste bill above depends on whether recycling is profitable. Most of the time, it isn't — and the gap comes out of your pocket.
Solar Panels
Net cost per tonne recycled:
Glass is 70% of weight but sells for €8–12/tonne. Silver drives value but recovery is rare.
Battery (LFP)
Net cost per kWh recycled:
LFP has no cobalt. Recyclers often charge gate fees because recovered metals don't cover costs.
Inverter
Net cost per unit:
Scrap value €5–15. Dismantling labour €50–100+. Most skip formal recycling.
What this means for you: Recycling credits in the table above are optimistic. If recycling markets are weak (pessimistic scenario), the "credit" shrinks to near zero and your waste bill grows. The EU WEEE eco-fee (€1–5 per panel) doesn't cover real recycling costs. Read the full economics analysis →
Embodied carbon = CO₂ emitted to manufacture your system. A 5 kWp system generates — kg CO₂ just from the panels — before they produce a single watt.
Lifetime offset = CO₂ avoided by displacing grid electricity. Using EU's grid intensity (— g CO₂/kWh) and solar yield (— kWh/kWp), your system avoids roughly — kg CO₂ over 25 years.
The good news: Solar is still strongly carbon-negative over its lifetime. The honest news: It's not "zero carbon" — it's net-negative after payback. Read the full carbon payback analysis.
End-of-Life Recycling Carbon Benefit
Recycling avoids virgin material production. Here's how much CO₂ your recycling choices could save:
| Panel recycling (—% rate) | — |
| Battery recycling (—% rate) | — |
| Inverter recycling (—% rate) | — |
| Total recycling carbon benefit | — |
These numbers assume your components actually get recycled. In reality, much of Europe's e-waste ends up in landfill or is exported. The actual carbon benefit depends on what really happens to your hardware.
Waste costs are uncertain. Here's how your adjusted payback changes under different assumptions:
| Scenario | Waste PV | Adjusted Payback | Impact |
|---|
What Installers Won't Tell You
"Recycling is sorted"
It's not. Panel recycling in the EU recovers mostly glass and aluminum frames — the valuable silicon and silver are often lost. Only ~10% of panels are formally recycled today. The rest sit in warehouses, landfills, or get exported.
"Batteries are recyclable"
Technically yes. Economically? LFP recycling is often loss-making. Cobalt-rich batteries (NMC) are profitable to recycle. LFP — the most common residential chemistry — often isn't. Someone pays the difference. That someone might be you.
"The warranty covers everything"
Warranties cover performance degradation and manufacturing defects. They don't cover end-of-life removal, transport, or disposal. When your inverter dies at year 12, the warranty is long gone. When your panels die at year 25, nobody's coming to collect them for free.
"EU law makes producers responsible"
The WEEE Directive says producers must finance collection and recycling. In practice, enforcement is patchy, eco-fees are too low to cover real costs, and many producers are based outside the EU. The homeowner often becomes the de facto waste manager.
Who Actually Pays? The Policy Reality
EU law says producers pay. Reality says something messier. Here's what actually happens:
| Component | What EU law says | What actually happens | Who pays in practice |
|---|---|---|---|
| Solar panels | WEEE: producers finance collection/recycling | Eco-fees €1.25–5/panel cover ~20% of real costs. Most panels go to informal recycling or landfill. | Homeowner or taxpayer |
| Batteries | Battery Regulation: mandatory recycling targets | Recycling rates ~50% for LFP. Profitable only for cobalt-rich cells. Gate fees common. | Homeowner (gate fees) or recycler (losses) |
| Inverters | WEEE: e-waste category, producer responsibility | Too complex for standard e-waste. Dismantling costs exceed scrap value. Often dumped. | Homeowner or environment |
| Decommissioning | No specific EU regulation | Completely unregulated. Costs vary wildly by roof type, access, and local labour rates. | Homeowner, always |
Source: Environmental Lifecycle Guide — compiled from IEA PVPS, EU WEEE implementation reports, and peer-reviewed LCA studies.
So, does this change your decision?
Probably not.
For most systems, waste costs add 2–6% to the upfront price in present value. Solar is still a net-positive investment in every EU country with decent sun.
But you should know the number.
Because when that bill arrives in 25 years, you won't be surprised. And because the industry's silence on end-of-life costs is a choice — not an accident.