It is May 2026, and if you’ve driven through Redhill or the surrounding Surrey hills lately, you’ll know that the electric revolution isn't just coming: it’s well and truly parked in our driveways. At ADS Electrical, we’ve seen a massive surge in homeowners making the switch to electric vehicles. It’s an exciting time, but as with any new technology, there’s a bit of a learning curve.
Most people think that once the charger is bolted to the wall, the job is done. However, we frequently see the same errors being made by well-meaning EV owners. These mistakes can range from minor annoyances to serious safety hazards or even damaging your car’s expensive battery.
Whether you’ve just taken delivery of your first EV or you’ve been driving one for years, here are seven mistakes you might be making with your EV charger: and exactly how to fix them.
1. Choosing the Wrong Charger for Your Needs
One of the most common mistakes happens before the charger is even installed. Many drivers opt for the cheapest unit they can find online, or they try to survive solely on a "granny cable" (a Level 1 charger that plugs into a standard household socket).
The Problem:
If you’re commuting from Redhill into London or taking regular trips across Surrey, a Level 1 charger simply won’t cut it. It can take upwards of 24 hours to charge a modern long-range battery. Conversely, some people spend a fortune on high-spec 22kW chargers, only to realise their home’s electrical supply or their car’s internal converter can only handle 7kW.
How to Fix It:
Before you buy, check your car’s maximum AC charging rate. For most UK homes, a 7kW Level 2 charger is the "sweet spot." It’s fast enough to charge most cars overnight but won't require a massive industrial-grade upgrade to your domestic supply. Match your charger to your daily mileage and your car's technical specs.
2. Skipping a Proper Electrical Load Check
This is a big one. An EV charger is unlike any other appliance in your home. While an oven or a power shower runs for a short burst, an EV charger pulls a heavy, continuous load for hours on end.
The Problem:
Adding a high-powered charger to an older consumer unit without a load calculation is asking for trouble. In some of the beautiful older properties around Reigate and Redhill, the existing electrical service simply wasn't designed to handle the extra 32 amps an EV charger demands alongside a heat pump, electric oven, and power shower. This leads to tripped breakers, overheating wires, and potentially dangerous electrical fires.
How to Fix It:
Always hire a qualified electrician redhill to perform a full load calculation before installation. We check your total demand and ensure your main fuse can handle the load. If things are tight, we can install smart load management systems that automatically throttle the charger’s speed if you turn the oven on, keeping your home safe without needing a costly service upgrade.
3. Cutting Corners with "Creative" Wiring
We get it: everyone wants to save a bit of money. But we’ve seen some truly terrifying DIY setups lately, including chargers running off extension leads or "tapped into" existing garage circuits that are already under stress.
The Problem:
EV charging requires a dedicated circuit. Sharing a circuit with other high-draw appliances or using standard domestic extension cords is a recipe for disaster. Standard plugs are not designed to handle maximum current for 8–10 hours straight; they will melt, and they can cause fires.
How to Fix It:
Ensure your charger has its own dedicated circuit and the correctly rated RCD (Residual Current Device). This prevents a fault in your car from knocking out the lights in your house, and more importantly, it ensures the wiring is thick enough to handle the heat. For a safe and compliant ev charger installation surrey, always stick to the regulations.
4. Poor Charger Location and Cable Management
Where you put the charger matters just as much as what charger you buy. We often see units installed in spots where the cable has to be stretched to its limit or, worse, draped across a public pavement or a high-traffic walking path.
The Problem:
Tripping over cables is the number one cause of charger-related accidents. Furthermore, if the cable is constantly strained or left lying in a puddle on the driveway, the internal wiring will eventually fail. Exposure to the elements is expected, but leaving the connector face-up in the rain is asking for corrosion.
How to Fix It:
Think about where your car’s charging port is located (it varies by model!). Mount the charger so the cable reaches comfortably with a bit of slack. Invest in a proper cable hook or a holster to keep the connector off the ground and protected from the weather when not in use.
5. Treating Your EV Battery Like a Gas Tank
If you grew up driving petrol or diesel cars, your instinct is to fill up to 100% and run it down to nearly empty. With an EV, this is a mistake.
The Problem:
Lithium-ion batteries don’t like being kept at 100% charge for long periods, especially in the heat. Conversely, letting the battery drop to 0% can cause permanent cell damage. Constant "top-offs" to 100% every single night will accelerate battery degradation, reducing your car's range over time.
How to Fix It:
For daily driving around Surrey, follow the 20-80% rule. Keep your battery between 20% and 80% for the vast majority of the time. Only charge to 100% if you’re planning a long road trip the next morning. Most modern chargers and cars allow you to set a "charge limit" in the app: use it!
6. Ignoring Smart Features and Off-Peak Rates
Are you just plugging in as soon as you get home from work at 6 PM? If so, you’re likely paying the highest possible price for your electricity and putting maximum strain on the grid.
The Problem:
Electricity prices in 2026 fluctuate throughout the day. Charging during peak hours (usually 4 PM to 9 PM) is the most expensive way to fuel your car. You’re also missing out on "Smart Charging" features that can integrate with solar panels or respond to grid signals.
How to Fix It:
Switch to an EV-specific electricity tariff. Many providers offer significantly cheaper rates between midnight and 5 AM. Use your charger’s app to schedule your session for these hours. If you have solar panels, look for a "Solar Divert" feature (like those found on Zappi chargers) that uses your excess sun power to charge the car for free.
7. Neglecting Maintenance and Software Updates
Because EV chargers have no moving parts, people assume they are "fit and forget." This isn't strictly true.
The Problem:
Dust, spiders, and corrosion can build up inside the charging handle. More importantly, the software (firmware) inside your smart charger needs updates to stay compatible with new car models and to patch security vulnerabilities. An outdated charger might suddenly stop communicating with your car or fail to start a scheduled charge.
How to Fix It:
Every few months, give your charger a quick health check. Look for any signs of discolouration or "browning" on the plug pins: this indicates heat buildup. Wipe down the connector with a dry cloth and ensure the cable isn't frayed. Most importantly, check your charger’s app periodically to ensure you’re running the latest firmware.
Why Local Expertise Matters
Setting up your home charging station shouldn't be stressful. When you get the installation right the first time, owning an EV is cheaper, cleaner, and far more convenient than visiting a petrol station. However, because every home in Redhill is different, a "cookie-cutter" approach rarely works.
At ADS Electrical, we pride ourselves on being the go-to experts for EV charging solutions Redhill. We don't just bolt a box to the wall; we look at your home’s capacity, your driving habits, and your budget to find the perfect fit.
Ready to get it right?
If you're worried about your current setup or you're looking to install your first home charging point, don't leave it to chance. Our team of certified professionals is ready to help you navigate the world of EV charging safely.
Contact ADS Electrical today for a professional EV charger installation Redhill and start charging smarter, not harder.