Solar panels are a long-term investment, so it’s worth understanding what you’re getting over time. Once installed on your roof, they’re designed to generate electricity quietly in the background with very little day to day input from you.
However, as with any system their performance does change gradually. In fact, output reduces slightly year on year and different factors can influence how long they continue to run efficiently. But what exactly affects their lifespan and what you can expect from your solar panels over the years? Read on for all the answers.
How long do solar panels last?
Most solar panels are designed to last 25 years or more. That said, they don’t suddenly stop working after that. Instead, their performance gradually reduces over time. Even after 25 years, many systems still continue to generate a significant portion of the electricity they produced when new.
You’ll typically see this gradual decline reflected in manufacturer warranties, which usually guarantee a certain level of output over time. With Hive, you’ll get a 10-year warranty as standard – meaning you can relax knowing any issues are take care of.
Overall, a properly installed system can continue generating energy beyond its expected lifespan – just slightly less.
What affects the lifespan of solar panels?
While solar panels are built to be incredibly durable, a few key factors can influence how long they last and how well they perform over time.
Panel quality
The quality of the panels themselves makes a huge difference. In fact, higher-quality panels tend to degrade more slowly and are built using more robust materials. They may cost more upfront, but they’re often designed to deliver more consistent performance over the long term.
Installation
How your panels are installed is just as important as the panels themselves. A properly installed system will be securely mounted, correctly angled and set up to avoid unnecessary strain on parts. This helps reduce the risk of issues developing over time and keeps the system running as expected.
All Hive Solar installations are handled by our experienced partners. That means your system is designed and fitted to a high standard, helping you avoid common solar panel problems and get the most out of your system over the long term.
Weather and environment
Solar panels today are built to handle changing weather conditions, from rain and wind to temperature fluctuations. Over time though, exposure to the elements can still have an impact. Things like debris, heavy snowfall or coastal conditions can contribute to wear and tear if the system isn’t properly protected or maintained.
Degradation over time
All solar panels gradually lose a small amount of efficiency each year. This is known as degradation. For most modern panels this happens slowly, typically at a rate of around 0.5% per year. That means your system will continue to generate a strong level of output for many years, just slightly less than when it was first installed.
Can you extend the life of your solar panels?
While solar panels are built for the long term, there are a few simple ways to help them perform at their best for longer. Things like keeping them clear of debris, making sure they’re installed correctly from the start, and monitoring performance over time can all make a difference. It can also help avoid bigger problems later on.
In reality, solar panels don’t require much attention, but having a little awareness goes a long way.
Do solar panels need maintenance?
Solar panels are designed to be low maintenance, which is part of their appeal for many households. In most cases, rain can help keep them clean. But it’s still worth checking them occasionally to make sure they’re clear of anything that could block sunlight, like leaves or debris.
It’s also a good idea to keep an eye on how your system is performing. If you notice a drop in output or anything unusual, having it checked early can help prevent more significant issues later on.
Some homeowners also choose to get it serviced regularly. But for many, simple visual checks and monitoring are enough.
What are the signs your solar panels may need replacing?
Solar panels rarely fail suddenly. But performance tends to decline gradually, so it’s usually a case of spotting when your system is no longer working as efficiently as it should.
There are a few signs to look out for over time:
- A noticeable drop in energy generation compared to previous years
- Higher electricity bills without a clear change in usage
- Visible damage such as cracks, discolouration or worn panels
- Ongoing faults or system alerts from your inverter or monitoring app
- Your panels getting older, especially around 25-30 years old
If you’re seeing one or more of these, it may be worth having your system checked. In some cases, a simple repair or part replacement is enough. But sometimes a full system upgrade might be more cost-effective in the long run.
When should you replace solar panels?
Solar panels don’t usually need replacing all at once. Instead, it’s something you consider over time as performance gradually changes.
If your system is approaching 25 to 30 years old, or you’ve noticed a steady drop in output, it may be worth reviewing your options. In some cases, newer panels can offer improved efficiency, making an upgrade worthwhile. It’s also worth noting that other parts of your system, such as the inverter, may need replacing sooner than the panels themselves.
Get solar from the experts
With Hive Solar, you’ll get professional installation and worry-free aftercare that’ll see you through for years to come.
Plus it’s simple to use from our award-winning app, so you can start generating electricity, tracking your usage and saving money from day one.
Get your free personalised quote from one of our trusted installers and start powering your home from your rooftop.