Is it worth buying used photovoltaic panels? Analysis of pros and cons

Photovoltaics is an increasingly popular technology, and the growing interest in renewable energy has led to the availability of used photovoltaic panels on the market. For many individuals and businesses, purchasing cheaper, second-hand modules may seem like an attractive solution, but is it really cost-effective? In this article, we provide a detailed analysis of the advantages and disadvantages of used PV panels.

1. Where Do Used Photovoltaic Panels Come From?

Used PV panels typically originate from:
System upgrades – Owners replace older modules with newer, more efficient ones.
Solar farms – Panels are dismantled during upgrades or decommissioning of installations.
Building renovations – Panels are removed due to property renovations or ownership changes.
Exhibition panels – Units used for testing or display purposes, but still fully functional.

2. Advantages of Buying Used Photovoltaic Panels

Lower Cost
The main advantage of buying used PV panels is their significantly lower price compared to new modules. Prices can be up to 50% lower, reducing the initial investment cost.

Faster Return on Investment (ROI)
With lower upfront costs, the return on investment (ROI) can be several years shorter compared to buying new panels.

3. Disadvantages of Buying Used Photovoltaic Panels

Lower Efficiency & Degradation
Every solar panel loses efficiency over time. The average annual efficiency loss is about 0.3-0.8%, meaning a 10-year-old panel could have 10-15% lower efficiency than a new one.

No Manufacturer’s Warranty
New PV panels typically come with a 20-25 year warranty, while used panels often lack warranty protection. This increases the risk of repair costs falling on the buyer in case of failure.

Potential Micro-Damage
Used panels may have invisible defects caused by weather conditions, improper transportation, or dismantling. Cracked solar cells can lead to reduced performance and a shorter lifespan.

Compatibility Issues
Older panel models may be incompatible with modern inverters and mounting systems, requiring additional investment in system upgrades.

Difficult to Assess Condition
Without specialized testing, it’s hard to evaluate the actual condition of used panels.

4. How to Check the Quality of Used Panels Before Buying?

If you decide to buy used PV modules, consider the following:

Visual Inspection – Check for cracks, scratches, discoloration, or visible damage.
Performance Testing – Request electrical tests (short-circuit current and open-circuit voltage measurement).
Usage History – Find out how long and under what conditions the panels were used.
Buy from Trusted Sellers – Avoid random offers and choose reputable companies specializing in panel refurbishment.

5. When Is It Worth Buying Used Panels, and When Is It Not?

It’s worth buying if:
You have a limited budget and want to reduce investment costs.
The panels come from a reliable source with documented history.
You don’t require maximum efficiency and plan to use them for small off-grid systems.

It’s not worth buying if:
You need a high-efficiency system with a long lifespan.
You can’t test the panels’ condition before purchase.
You don’t want to risk the lack of a warranty and potential repair costs.

Conclusion – Is It Worth Buying Used Photovoltaic Panels?

Buying used photovoltaic panels can be a cost-effective solution for those on a tight budget, but it comes with certain risks. The efficiency of such modules is lower, and the lack of a warranty and potential damage may affect their durability.

If you decide to go for used panels, make sure to buy from reputable sellers and thoroughly test the panels before installation.

Want to learn more? Contact our experts, who will help you choose the best photovoltaic solution!