As 2026 unfolds, the shift towards electric mobility in Surrey has moved from a "future trend" to a daily reality. From the busy streets of Redhill to the quiet lanes of Reigate, more residents are making the switch to electric vehicles (EVs). However, as the demand for home and workplace charging points surges, so does the number of poorly executed installations.
Installing an EV charger isn’t as simple as plugging in a new appliance. It is a high-load, continuous-draw electrical circuit that requires precision, local expertise, and strict adherence to the latest safety standards. At ADS Electrical, we see the same pitfalls repeatedly: mistakes that can lead to anything from voided warranties to serious fire risks.
If you are planning an EV charger installation in Surrey, here are the seven most common mistakes homeowners and businesses make, and exactly how you can avoid them.
1. The "DIY" Disaster: Risking Safety and Compliance
The most dangerous mistake any homeowner can make is attempting a DIY installation or hiring a "handyman" who isn't a qualified electrician in Redhill.
In the UK, EV charger installations must comply with BS 7671 (the IET Wiring Regulations) and the IET Code of Practice for Electric Vehicle Charging Equipment Installation. These regulations are updated frequently: most recently to the 18th Edition standards. A non-specialist may miss critical requirements like specific earthing arrangements (PME fault protection) or the correct sizing of cables.
The Fix: Always use an NICEIC Approved Contractor. Not only does this guarantee the work is safe, but it also ensures you receive an Electrical Installation Certificate (EIC), which is essential for your home insurance and the future sale of your property.
2. Ignoring Your Main Fuse Capacity
Most homes in Surrey have a single-phase electrical supply with a main fuse rated at 60, 80, or 100 Amps. A standard 7kW EV charger pulls about 32 Amps. If you have your electric shower, oven, and heat pump running simultaneously while your car is charging, you could easily exceed your home’s total capacity.
Failing to check this before installation often leads to "nuisance tripping": where your entire house loses power because the main fuse has blown.
The Fix: Before any installation, a professional survey should include a "load calculation." At ADS Electrical, we assess your existing demand and, if necessary, install chargers with Dynamic Load Management. This technology "throttles" the power to the car when the house is using a lot of electricity, ensuring you never blow a fuse.
3. Choosing the Wrong Charging Speed
A common point of confusion for new EV owners is the difference between 3.6kW, 7kW, and 22kW chargers.
- 3.6kW: Too slow for modern long-range EVs.
- 7kW: The "sweet spot" for 95% of Surrey homes. It provides a full charge overnight.
- 22kW: Requires a three-phase electrical supply.
Many people mistakenly buy a 22kW charger thinking it will be "faster," only to find out their home only supports 7kW, or their car can't even accept 22kW on AC power.
The Fix: For residential EV charger installation Redhill, stick to a high-quality 7.2kW smart charger. It’s the most cost-effective and efficient solution for domestic use. If you are a business owner in a Surrey industrial estate, we can discuss three-phase upgrades to support faster fleet charging.
4. Missing Out on OZEV Grants in 2026
While the government grants for standard homeowners in single-unit houses ended a few years ago, many Surrey residents and businesses are still eligible for significant funding in 2026: and they don't even know it.
Currently, the Office for Zero Emission Vehicles (OZEV) offers:
- The EV Chargepoint Grant: Up to £350 for renters and flat owners.
- The Workplace Charging Scheme (WCS): Up to £350 per socket (up to 40 sockets) for businesses and charities.
- Landlord Grants: For those who own rental properties in the Surrey area.
The Fix: Check your eligibility before you buy. Using an OZEV-approved installer like ADS Electrical is a requirement to claim these vouchers. We can help guide you through the application process to ensure you aren't leaving money on the table.
5. Neglecting Surge Protection and RCDs
Because an EV charger is a high-power device connected to your car's expensive battery and sensitive electronics, it needs specific protection. Standard household fuses aren't enough.
A common mistake is failing to install a Type A RCBO (Residual Current Breaker with Overcurrent protection) or a Surge Protection Device (SPD). Without an SPD, a power surge in the local Surrey grid (caused by lightning or grid switching) could potentially fry your car’s internal charger.
The Fix: Ensure your quote includes a dedicated circuit from your consumer unit with Type A RCD protection and an SPD. If your current fuse board is outdated, this is the perfect time for a consumer unit upgrade to bring your entire home up to 18th Edition safety standards.
6. Poor Placement and Cable Management
It sounds simple, but where you put the charger matters. We have seen chargers installed at the back of driveways where the cable has to stretch across a public footpath or a high-traffic walking area, creating a major trip hazard.
Furthermore, if the charger is installed too low (near the ground), it’s more susceptible to water ingress and physical damage from garden tools or car doors.
The Fix: Think about where your car’s charging port is located (it varies by model: some are at the front, some at the rear side). Ideally, the charger should be mounted between 0.5m and 1.5m high, in a spot that allows the cable to reach the car easily without being under tension.
7. Failing to Future-Proof (Solar and V2G)
By 2026, smart charging is no longer just about "turning on at night." Many homeowners in Redhill are installing solar panels to reduce their energy bills. If you buy a "dumb" charger now, you won't be able to integrate it with your solar system later to charge your car for free using the sun.
Similarly, "Vehicle-to-Grid" (V2G) and "Vehicle-to-Home" (V2H) technologies are emerging, allowing your car to power your house during a blackout.
The Fix: Choose a "Smart" charger that is solar-compatible (like the Zappi or certain Ohme models). Even if you don't have solar today, having a charger that can speak to your energy tariff or solar inverter will save you hundreds of pounds in the long run.
Why Choose ADS Electrical for Your Surrey EV Install?
At ADS Electrical, we aren't just "fitting a box." We provide a full project management service from initial design to final certification. As NICEIC Approved Contractors, we pride ourselves on:
- Fast Quotes: Free, no-obligation quotes within 24 hours.
- Local Expertise: Deep knowledge of Surrey’s housing stock and local grid requirements.
- End-to-End Service: We coordinate with other trades and handle all the paperwork for your EICR and OZEV grants.
Don't let a simple mistake turn into a costly repair. Whether you're a landlord needing an EICR landlord certificate or a homeowner ready to embrace the electric future, we are here to help.
Ready to get started?
Contact ADS Electrical today for a professional, safe, and efficient EV charger installation Redhill. Let’s make sure your move to electric is a smooth one.