6 Mistakes to Avoid with EV Charger Installations

As electric vehicles (EVs) continue to drive a transformation in how we power our homes and drive our cars, installing an EV charger is one of the smartest upgrades you can make. Here’s the catch: doing it wrong can mean wasted money, frustrated charging, and even serious safety risks. That’s why we always ensure that installations are done right, from day one.

In this post, we break down six of the most common mistakes we see in EV charger installations here in Niagara. We’ll explain why each mistake matters, what the consequences can be, and how you can avoid it (whether you’re a homeowner, condo manager, or small business).

Mistake 1: Skipping a Professional Assessment

Before you install a charger you need to know: is your electrical system ready? Will your panel support the extra load? Are there constraints in your wiring or service? The risk of skipping this step is that you install something that doesn’t perform, overburdens your system, or worse … becomes a safety or code violation.

Ontario’s Electrical Safety Authority (ESA) emphasizes that many homes are not immediately ready for EV charger installations without a professional review.

Hire a Licensed Electrical Contractor (LEC) to:

• Evaluate your service panel capacity and wiring.

• Review your parking/installation location.

• Coordinate with your local utility if service upgrades may be needed.
  
  

Mistake 2: Choosing the Wrong Charger for Your Needs

Not all EV chargers are equal. Chargers differ in power levels (Level 1, Level 2), features (smart scheduling, load-sharing), installation requirements, and future readiness. Picking the wrong one can leave your EV under-charged, require future upgrades, or even cause poor performance.

Many consumers underestimate how their driving habits, battery size, and parking configuration affect charger choice.

• Match charger level to your vehicle and daily driving habits.

• Consider future vehicles or multiple EVs.

• Choose a certified product approved for use in Canada.

Mistake 3: Ignoring Permits & Code Requirements

Electrical work in Ontario is regulated. Permits, inspections, and certification matter for safety, compliance and insurance. Ignoring them can leave you exposed to risk, fines or denied claims.

In a recent ESA blitz, over 400 installations in Toronto were found without a permit, meaning compliance and safety could not be verified.

• Confirm your installer files a “Notification of Work” with ESA.

• Ask for a Certificate of Acceptance once work is completed.

• Ensure adherence to the Ontario Electrical Safety Code (OESC).
  
  

Mistake 4: Poor Charger Placement

Where you install the charger affects usability, safety and long-term durability. Placement issues include inadequate cable reach, obstacles, weather exposure or inappropriate mounting.

• Easy access to the vehicle.

• Cable management (avoid doors, tripping hazards).

• Weatherproofing if outdoors (see Mistake 5).

• Location relative to panel and wiring run length.

Work with your electrician to select the best mounting spot. Review details like conduit run, cable length, and future expansion possibility.

Mistake 5: Cutting Costs on Wiring & Breakers

A charger is only as safe as its feeder wiring and protective equipment. Undersized breakers, poor routing, or inadequate conduit can lead to overheating, voltage drop or short lifespan.

Industry bodies in Ontario warn that DIY or under-estimated wiring is a major source of risk.

• Ensure wiring meets OESC standards (conductor size, insulation rating).

• Use appropriate breaker size per charger rating.

• Use professional installation — not a “plug-in anywhere” approach.

• Grounding and bonding must be correct.

Mistake 6: Attempting DIY Installation

EV charger installation touches high-voltage circuits, panel upgrades, permits, code compliance and often utility interaction. DIY may save upfront cost–but risks safety, future upgrades and insurance complications.

The ESA and the Electrical Contractors Association of Ontario (ECAO) note that many “DIY” installations result in hazard conditions (extension cords, tree mounts, overloaded panels).

• Use a Licensed Electrical Contractor with EV-certified training (EVITP).

• Verify installer’s credentials and permit filing.

• Don’t assume “plug and play”–installation matters.

• Consider future-proofing (smart chargers, V2G readiness).
  
  

Future-Proofing & Why Good Installation Matters

Beyond immediate safety and performance, proper installation protects your investment. For example:

• Smart chargers and vehicle-to-grid (V2G) technology are on the rise. A poorly installed unit today may hinder future upgrades.

• Outdoor installations face weather, corrosion, cable stresses and require rated equipment.

• Equipment reliability is emerging as an issue when chargers are improperly installed or maintained.

Installing an EV charger is an exciting and responsible step toward the future, But the quality of that installation matters just as much as the vehicle you plug into it. Avoiding these six mistakes ensures you get an installation that’s safe, efficient, code-compliant and future-ready.

At Keener Electric, we’re committed to helping homes and businesses in Niagara and beyond to live better electrically. If you’re considering an EV charger installation – or need a second opinion – reach out. Let’s get it done right.