Used Solar Panels: Are They Worth It?

We are going to be straight with you, because that is how we do business.

What "used" actually means

Our panels come from decommissioned utility-scale solar farms — large commercial installations that got upgraded or shut down. These panels were built to last 25+ years. Most of them have 10-15 years of life left.

That is not just a sales line. Quality crystalline-silicon panels degrade slowly: NREL's review of nearly 2,000 field studies found a median degradation rate of about 0.5% per year. A 12-year-old panel is typically still producing around 94% of its original output.

They are not damaged or defective. They are simply used, the same way a used truck with 80,000 miles is still a solid truck.

The real cost comparison

A new 300W panel from a big supplier runs $150-200. Our used 300W panels run $90.

For a 6-panel system:

• New panels: $900-1,200
• Our used panels: $540

That is $360-660 back in your pocket. For the full payback breakdown — including degradation, longevity, and what to inspect before buying — see the real math on used solar panels.

When used panels make sense

• Off-grid cabins and homesteads where aesthetics do not matter
• Backup power systems
• Agricultural applications (shop power, water pumping)
• DIY builds where you want to learn without breaking the bank

When to consider new panels

• Grid-tied systems where efficiency matters for ROI calculations
• Situations where panel warranty is required by code or lender
• Roof installations where you want maximum watts per square foot

Our honest take

For 90% of the off-grid customers we work with in eastern Washington, used panels are the right call. The math is hard to argue with.

Not sure how many you need? Start with our panel-sizing framework, then browse our current stock or call us in Oroville.