Solar Buyback Australia: Can You Sell Your Old Panels?

📋 In this guide:

• Solar buyback in Australia: sell or upgrade your old panels
• Older systems lose output and value over time
• Buyback can beat scrapping or replacing yourself
• Value depends on system size and condition
• Tesseract buys panels at $215/kWp plus bill credit

If you put solar on your roof eight or ten years ago, there’s a good chance it’s quietly underperforming. Panels degrade, inverters age, and a small early system that made sense in 2015 can look undersized next to today’s bills and battery options. So when people ask about solar buyback Australia, the real question underneath is: do I have to just bin this old system, or is it worth something?

The answer, increasingly, is that it can be worth something, either as a trade-in toward a better setup or as a way to avoid the waste and cost of ripping panels out and sending them to landfill. Your old system isn’t necessarily a sunk cost.

This guide explains what solar buyback is, when selling or upgrading makes sense, what old panels are actually worth, and how buyback compares to replacing the system yourself.

What Is Solar Buyback and Why It Exists

Solar buyback is when a provider pays you for your existing solar panels, usually as part of upgrading you to a newer, larger system. Instead of you paying to remove and dispose of the old gear, the provider assigns it a value and puts that toward your new setup.

It exists for a practical reason. Early systems are often small (think 1.5kW or 3kW) with no battery and an ageing inverter. As bills rise and storage becomes central, those systems leave a lot of value on the table. Buyback gives homeowners a way to move up without the full cost of starting over, and it keeps usable equipment out of landfill.

When Selling or Upgrading Old Panels Makes Sense

A few signs your old system is a buyback candidate. It’s small by today’s standards and doesn’t cover much of your bill. It has no battery, so your daytime solar exports at low feed-in rates while you buy back at peak. The inverter is near or past its expected life. Or your usage has grown, more people, an EV, electric appliances, and the system simply can’t keep up.

If any of those ring true, you’re likely getting only a fraction of the value a modern system would deliver. Upgrading with a buyback can turn that stranded old gear into a discount on something that actually fits your home.

How Much Are Old Solar Panels Worth?

Be realistic: old panels aren’t worth what you paid for them. Their value in a buyback depends on the system size (measured in kWp), the condition and age of the panels, and the type of upgrade you’re moving to. A larger, well-maintained array is worth more than a tiny, weathered one.

As a concrete example, Tesseract’s buyback offer values existing panels at $215/kWp. So a 3kWp system would be assessed at around $645 under that offer, put toward the upgrade. Figures vary by provider and the specifics of your system, so treat any number as indicative until your setup is actually assessed.

Buyback vs Replacing Yourself

You could, of course, just pay to remove the old system and buy a new one outright. That works, but you wear the full cost: removal, disposal, and the entire price of the new system, plus the ongoing maintenance risk.

Buyback changes the equation in two ways. The old system offsets part of the new cost rather than becoming a disposal bill, and if the upgrade is offered as an energy-as-a-service plan, you may avoid the upfront cost of the new system entirely. The comparison isn’t really “buyback or not.” It’s “turn the old system into value” versus “pay twice, once to remove, once to replace.”

A Real-Life Scenario: The Stranded 3kW System

Picture a Queensland homeowner with a 3kW system from 2014, no battery, original inverter starting to throw faults. On paper it still “works,” but it covers barely a third of a bill that’s grown as the family added an EV. Most of its midday output exports at a few cents while they buy back power every evening at peak.

Rather than pay to tear it out, they took a buyback upgrade. The old panels were valued and put toward a modern solar-and-battery system. The faulty inverter became someone else’s problem, the new battery started covering their evenings, and they skipped the disposal cost entirely. The old system finally pulled its weight, on the way out.

Is your old system actually saving you much anymore, or just sitting there?

Where Tesseract ZERO Fits In

Tesseract’s buyback offer is built for exactly this situation. Tesseract purchases existing panels at $215/kWp and upgrades the home to a 6.6kWp solar and 20kWh battery system, with the offer including an $80/month bill credit, a free battery, and a Power Backup Gateway (valued at $1,200) for blackout protection. Because it runs on the energy-as-a-service model, the upgrade is $0 upfront with $0 maintenance and a fixed $0.28/kWh for 10 years through the Tesseract retail partner. Your ageing system becomes the starting point for a much larger one, instead of a removal bill.

The Bottom Line

Solar buyback in Australia means your old, underperforming panels don’t have to be a write-off. If your system is small, battery-less, or running an ageing inverter, buyback lets you put its value toward a modern setup rather than paying to scrap it. What it’s worth depends on size and condition, and figures like $215/kWp give a sense of the order of magnitude. Weigh buyback against the full cost of removing and replacing the system yourself, and the upgrade path usually looks a lot more appealing.

Wondering what your current system is worth? Book a free assessment and we’ll value your panels and show you the upgrade options.

For related reading, see solar panels for rental property in Australia and our explainer on the solar PPA in Australia.

Frequently Asked Questions

Can I sell my old solar panels in Australia?

Often yes, through a solar buyback, where a provider pays for your existing panels, usually as part of upgrading you to a newer system. The value depends on your system’s size and condition. It’s typically more worthwhile than paying to remove and dispose of the panels yourself.

How much are old solar panels worth?

Less than you paid, but not nothing. Value depends on system size (kWp), age and condition. As an example, Tesseract’s buyback values panels at $215/kWp, so a 3kWp system would be assessed at around $645 toward an upgrade. Exact figures vary by provider and system, so get yours assessed.

Is it better to upgrade with a buyback or replace my system myself?

Buyback usually comes out ahead, because your old system offsets part of the new cost instead of becoming a disposal bill, and some upgrades are offered with no upfront cost through energy-as-a-service plans. Replacing it yourself means paying for both removal and the full new system.