Solar Safety
The Two Sides Of Solar Safety And How To Get Them Both Right
Solar system technology has established itself as both efficient and reliable, but safety must always remain the highest priority. As systems grow more advanced and connected, it is important that both physical risks, such as electrical faults, and cybersecurity vulnerabilities are pre-empted and managed to ensure safe and efficient operation.
In this article, Christelle Barnes, UK Country Manager at SolarEdge Technologies, outlines what electrical contractors and installers need to know to stay ahead of evolving safety expectations.
As solar system technology becomes more advanced and widely adopted, it is fundamentally reshaping the way energy is produced – and steadily increasing its contribution to the UK’s national energy mix. However, with innovation comes complexity, and a range of safety challenges that extend beyond fire prevention alone. Understanding the full spectrum of risks – from electrical hazards to emerging cybersecurity vulnerabilities – is vital for protecting people, property and energy infrastructure, and for ensuring that solar remains a trusted and secure part of our energy future.
Best Practice For Physical Protection
Let’s start by looking at physical safety. With millions of systems installed worldwide, solar PV is proven to be a safe, reliable technology that does not inherently pose a risk to people or property. Commercial infrastructure fires can be caused by many things, including electrical malfunctions in heating systems, factory machinery or even lightning. While fires stemming from solar PV systems are rare, it is important to thoroughly evaluate the safety of any existing or planned installations, particularly when selecting or upgrading system components.
When a building fire is found to originate from a solar PV system, causes may include installation error or improper maintenance, particularly involving connector wear and tear. These errors may not cause a problem initially, but over time they can potentially lead to electrical faults, which, if not caught, can develop into something more serious. Fortunately, advances in solar system technology now enable effective detection and prevention of overheating at the connector level – a topic we’ll explore in more detail later in this article.
To support safer installations, many technology providers invest in ongoing training. However, even when installations are carried out flawlessly, external factors beyond anyone’s control, such as an animal chewing through a cable, can introduce faults. It is at this point that component selection becomes key.
14 fmuk Safety Starts At The Panel Level
Before we explore specific safety features, it is useful to first step back and review the individual components of solar PV systems – and how each can be secured.
The main components of solar systems are PV panels and inverters. The panels generate electrical power by converting solar radiation into direct current (DC). Inverters then convert the DC power to alternating current (AC) used to power homes, buildings and businesses.
As long as the sun is shining, solar panels and cables remain energised with high DC voltages, even if the main circuit breaker is shut off. In the event of a fire, firefighters typically disconnect the grid supply before intervening. They assume there is no risk of electrocution once the grid has been disconnected, allowing the spray of water and creation of holes in the roof so that heat and smoke can dissipate. However, this assumption is not true in the case of a typical PV roof system, as the system is creating its own electricity independent of the grid.
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