Investing in solar panels is a significant financial decision, and understanding the warranties that protect your investment is essential. A solar panel system should last 25 years or more, but things can go wrong. That is why modern solar systems come with multiple layers of warranty protection. Knowing what each warranty covers, how long it lasts, and what it means for you can make the difference between a smooth ownership experience and unexpected costs down the line.
At Solar Dream, we install solar panel systems across Norfolk, Suffolk, and East Anglia using only high-quality components from manufacturers with strong warranty terms. We are MCS, RECC, and NICEIC accredited, meaning our installation work is covered by comprehensive guarantees and backed by industry approved consumer protections. Here is your complete guide to solar panel warranties in the UK.
The Three Main Types of Solar Warranty
When you buy a solar panel system, you actually get three separate warranties. Understanding each one is important because they cover different parts of your system and come from different providers. The three main types are the product warranty, the performance warranty, and the installation warranty. Let us look at each one in detail so you know exactly what protection you are getting.
Product Warranty
The product warranty, also called the manufacturer’s warranty, covers defects in materials and workmanship of the solar panels, inverters, and other components. For solar panels, most leading manufacturers offer a 12 to 25 year product warranty. Tier 1 panel manufacturers like LONGi, JA Solar, Trina Solar, and Canadian Solar typically provide 15 to 25 year product warranties. This warranty covers issues such as premature degradation, delamination, corrosion, defective junction boxes, and manufacturing faults that cause the panel to fail. Inverters typically come with shorter product warranties of 5 to 12 years, with options to extend, because they contain more complex electronic components.
Performance Warranty
The performance warranty guarantees that your solar panels will produce a certain percentage of their rated power output over time. All solar panels degrade slowly, losing a small fraction of their output each year. A standard performance warranty guarantees that the panels will still produce at least 90 per cent of their rated output after 10 years, and at least 80 per cent after 25 years. Reputable manufacturers offer these warranties as standard. The performance warranty is what protects your long-term financial returns, so it is important to choose panels from manufacturers with a strong track record of meeting their performance guarantees. Some premium panels offer even better degradation rates of 92 per cent after 10 years and 85 per cent after 25 years.
Installation Warranty
The installation warranty covers the quality of the installation work itself. This includes the roof mounting system, the electrical connections, the weatherproofing, and the integrity of the installation. At Solar Dream, we provide a comprehensive installation warranty that covers our workmanship and gives you complete peace of mind. Our MCS accreditation means our installations meet the highest industry standards, and our RECC membership gives you access to independent dispute resolution if anything goes wrong. Always choose an MCS accredited installer to ensure your installation warranty is backed by a recognised quality standard and that you have recourse if problems arise.
What Solar Panel Warranties Typically Cover
A good product warranty covers manufacturing defects, premature wear, and component failures that are not caused by external damage. This includes issues like broken cells, faulty bypass diodes, defective junction boxes, and abnormal discolouration that affects performance. Warranties do not cover damage caused by improper installation, extreme weather events, physical impact, vandalism, or unauthorised modifications. That is why choosing a qualified, accredited installer like Solar Dream is so important. If your installer cuts corners, the manufacturer can void your product warranty. Reading the fine print before you commit is always a good idea, and we help our customers understand exactly what is and is not covered.
Inverter Warranties and Extended Options
Inverters typically have shorter warranties than solar panels because they contain more moving parts and electronic components. Most inverter manufacturers offer a standard 5 to 7 year warranty, with options to extend to 10, 12, or even 20 years. Extending your inverter warranty is usually good value and worth considering, because replacing an inverter out of warranty can cost £500 to £1,500 depending on the type. At Solar Dream, we advise our customers on whether extended inverter warranties make sense for their specific system and budget. In many cases, the cost of extending the warranty is modest compared to the potential cost of an out-of-warranty replacement.
Battery Storage Warranties
If you add battery storage to your solar system, the battery comes with its own warranty terms. Most lithium-ion solar batteries offer a 10 year warranty or a certain number of charge cycles, whichever comes first. The warranty typically guarantees that the battery will retain at least 60 to 70 per cent of its original capacity at the end of the warranty period. Battery warranties also specify operating conditions, such as temperature ranges and depth of discharge limits. We install Hinen batteries, which come with competitive warranty terms and are ENA approved for UK grid connection. Understanding these terms helps you choose a battery that will deliver reliable performance for years to come. When comparing battery options, always check both the warranty duration and the throughput or cycle limit, as some batteries may reach their cycle limit well before the warranty period expires.
Transferability of Solar Warranties
Most solar panel and inverter warranties are transferable if you sell your home. This is an important benefit because it adds value to your property. The transfer process usually involves notifying the manufacturer and paying a small administrative fee. A solar system with transferable warranties is a strong selling point, as the new owner inherits the remaining warranty protection. When comparing solar quotes, ask about warranty transferability. At Solar Dream, we make sure our customers understand the transfer process from the start so there are no surprises later when they decide to sell their home.
What Happens if a Manufacturer Goes Out of Business?
This is a legitimate concern for any solar buyer. If a panel manufacturer ceases trading, their warranties become worthless. That is why we choose manufacturers with strong financial stability and a long track record in the industry. Tier 1 manufacturers are generally safer bets because they have the financial resources to honour warranty claims over the long term. Our RECC membership also provides additional protection, as it requires us to treat customers fairly and provides a route for resolving disputes if something goes wrong with your installation. Always ask your installer about the financial standing of the brands they recommend.
How to Make a Warranty Claim
If you experience a problem with your solar system, the first step is to contact your installer. As an MCS accredited installer, Solar Dream handles warranty claims on your behalf. We liaise with the manufacturer, arrange any necessary diagnostic visits, and manage the replacement or repair process. This is one of the major advantages of choosing a local, accredited installer rather than a distant national company. We are here for the long term, and we stand behind every system we install. Our customers in Norfolk and East Anglia know they can rely on us for support throughout the life of their system, not just on installation day.
Why Solar Dream’s Warranties Give You Peace of Mind
When you choose Solar Dream, you are not just buying solar panels. You are buying a complete package backed by multiple layers of protection. We use Tier 1 solar panels with strong manufacturer warranties. We install Hinen inverters and batteries with comprehensive warranty terms. Our MCS accreditation guarantees our work meets the highest standards. Our RECC membership gives you access to independent consumer protection. And our own installation warranty covers our workmanship for your complete peace of mind.
We believe in transparency. Before you sign anything, we explain every warranty that applies to your system, what it covers, how long it lasts, and what to do if you need to make a claim. No hidden terms, no fine print surprises. Just honest, professional service from a team that takes pride in doing the job right.
Get in Touch with Solar Dream
Understanding solar panel warranties can feel overwhelming, but it does not have to be. At Solar Dream, we make sure you know exactly what protection comes with your system. Visit our solar PV page to learn more about our installation service, or contact us to book your free, no-obligation consultation. We also offer flexible finance options. Call Solar Dream today and invest with confidence.
FAQs
A product warranty covers defects in materials and workmanship of the solar panels, including premature degradation, delamination, corrosion, defective junction boxes, and manufacturing faults.
Solar panel product warranties typically last 12 to 25 years depending on the manufacturer. Performance warranties guarantee at least 90 per cent output after 10 years and 80 per cent after 25 years.
Yes, inverters typically have shorter warranties of 5 to 12 years because they contain more electronic components. Most manufacturers offer extended warranty options for an additional cost.
A product warranty covers manufacturing defects and failures. A performance warranty guarantees that your panels will produce a minimum percentage of their rated power output over time, protecting your long-term financial returns.
Most solar panel and inverter warranties are transferable to a new homeowner, usually for a small administrative fee. This adds value to your property when selling.
