Do EV Chargers Need Surge Protection?

We see firsthand the research that goes into every aspect of EV ownership before people transition to electric driving. It’s a lifestyle change, so we understand why. At Skywell, we want our customers to be as comfortable as possible with this decision, which means educating them not only about our models but also about EV ownership in general. Often, this includes home EV charging and general details about the charging process.

If you’re planning or researching EV charger installation, you may have come across the term surge protection.

If so, and you are trying to get your head around this, this guide explains what surge protection does, why it matters for your home EV charging setup, and how it protects your charger, Skywell electric vehicle, and the wider electrical system from damage caused by power surges.

What Is Surge Protection?

A surge protection device (SPD) is designed to protect your electrical circuits and appliances from sudden voltage spikes, also known as power surges, which can be caused by lightning strikes, grid switching events, modern appliances switching on/off, and other transient overvoltage events. These surges can harm sensitive equipment, including EV chargers, other electrical appliances, and even your home’s wiring.

SPDs are typically installed at your fuse box/consumer unit, where they can safely divert excess energy to earth before it damages connected equipment.

Why Surge Protection Matters for EV Chargers

Protect Your EV Charger & Vehicle

Modern EV chargers and the electronics in an electric vehicle like the Skywell BE11 are built with sensitive components. A significant power surge travelling through your home’s electrical system could damage your charger or, in extreme cases, harm the vehicle’s charging electronics.

Heavy Duty Installation Components

An EV charger installation introduces a dedicated circuit to your home’s electrical system. Surge protective devices help ensure that this new circuit and the charger connected to it aren’t exposed to harmful transient voltages that can degrade or destroy expensive equipment over time.

What the Wiring Regulations Say (18th Edition Amendment 2)

In the UK, the IET Wiring Regulations (BS 7671:2018+A2:2022), often referred to as the 18th Edition, govern electrical safety standards. A key update from Amendment 2 is that surge protection devices (SPDs) are now required on most new circuits, including those installed for EV chargers.

The regulations require protection against transient overvoltage unless the owner explicitly accepts the risk of omitting an SPD. This means that while you can choose to decline surge protection, it’s generally recommended as best practice for EV charger installations.

Installing SPDs during your EV charger setup ensures compliance with the latest wiring regulations and adds an extra layer of safety to your electrical system.

How Surge Protection Works with Your Install

Most installers fit an SPD in your home’s consumer unit/fuse box at the same time as your EV charger, which helps to:

• Shield your EV charger hardware from voltage spikes
• Protect your wiring and electrical circuits
• Safeguard connected devices, including the Skywell BE11’s charging interface
• Reduce the risk of damage caused by lightning strikes or grid surges

Surges travel along the mains supply, and without an SPD, they can reach your charger or other electronics in your home, potentially causing failure or reducing their lifespan.

Are Surge Protection Devices Mandatory?

Strictly speaking, the updated wiring rules do not legally force you to install SPDs; as a homeowner, you can choose to decline them if you wish, but the regulations require that the option be offered and that any risks of omitting them are understood.

However, given how inexpensive SPDs are compared with the cost of replacing an EV charger or repairing damage, most installers incorporate them as standard.

Types of Surge Protection Devices for EV Charging

There are different types of SPDs that can protect different parts of your electrical system:

• Type 1 SPDs – installed at the origin (main incomer) to protect against direct lightning and very high surges
• Type 2 SPDs – installed at sub-distribution boards or within a consumer unit to handle indirect surges
• Combined Type 1+2 SPDs – a versatile option often fitted in modern installations

Your electrician will select the most appropriate SPD arrangement for your home’s specific wiring and risk profile.

Installation and Home EV Charger Safety

A qualified electrician or EV charger installer should always carry out your EV charger installation, including any surge protection work. They will evaluate your fuse box/consumer unit, assess your home’s earthing arrangements, and install the surge protection device in line with the latest wiring regulations.

Because surge protection works alongside other safety measures, such as RCDs and proper earthing, it’s an important part of overall installation safety.

Do EV Chargers Need Surge Protection?

• New EV charger circuits generally should include an SPD under the latest wiring regulations (18th Edition Amendment 2).
• Surge protection protects your EV charger, electrical system, and the vehicle itself from voltage spikes.
• You can decline surge protection, but it’s recommended, especially given the relatively low cost and high value of EV charging equipment and your Skywell BE11.
• SPDs are installed in the fuse box/consumer unit by qualified installers to help protect devices, wiring and home electrical systems.

Protect Your EV Charger, It’s Worth It

Power surges are unpredictable. The Skywell BE11 is built with advanced electronics and fast-charging capability, so pairing it with a protected EV charger installation is a smart way to protect your investment and ensure long-term reliability.

Adding a surge protection device (SPD) to your EV charger installation safeguards your charger, your vehicle, and your home’s electrical system from surges. It’s a small part of your overall setup, but it delivers peace of mind and aligns with the latest wiring regulations.

Need help with your EV charger or surge protection?

Our Skywell UK team can advise you on compliant home charging installations, recommended safety upgrades and how to make the most of your BE11’s charging infrastructure.