Why Extreme Florida Heat Can Slow Down Your EV Charging (and What to Do About It)

If you're an EV owner in Southwest Florida, you already know August doesn't play around. The pavement shimmers, the garage feels like a pizza oven by 10 a.m., and your AC is working overtime just to keep the house livable. What you might not know is that same heat is working against your EV charger too.

At Anthony's, we've been keeping Florida homes comfortable and safe for almost 40 years — first with HVAC, and now with the electrical work that comes along with modern home upgrades like EV charging. So when customers start asking us why their charger seems to be dragging its feet in the middle of summer, we like to give it to them straight, no upselling required.

Your EV's Battery Doesn't Love Florida Summers Either

Every EV has a battery management system that constantly monitors temperature. When the battery gets too hot — and a car sitting in direct Florida sun for hours can easily climb well past 120°F under the hood — the system automatically slows down

charging to protect the battery from damage. That's not a flaw, it's the car doing exactly what it's supposed to do. But it does mean that charger you paid good money for might be delivering less power than it's capable of on the hottest days of the year.

This isn't unique to any one brand or model. It's physics. Heat is the enemy of battery longevity, and every automaker builds in safeguards for it. The trade-off is charging speed on days like the ones we get all August long here on the Suncoast.

The Charger's Location Matters More Here Than Almost Anywhere Else

This is where a lot of homeowners get surprised. In a cooler climate, where you install your charger is mostly a matter of convenience. In Florida, it's a performance issue.

A charger and vehicle baking in an unshaded driveway all afternoon are working against themselves before you even plug in. A few things we look at when we're planning an installation for a Florida home:

• Garage vs. carport vs. open driveway. An enclosed garage keeps the car out of direct sun, but it also traps heat if it isn't ventilated well — sometimes making things worse instead of better. A shaded carport with good airflow is often the sweet spot.
• Ventilation. If your charger is going in an attached garage, we make sure there's enough airflow so heat doesn't just sit and build up around the vehicle and equipment all day.
• Equipment placement. The charging unit itself has its own heat tolerances. We avoid mounting it anywhere it'll take direct afternoon sun for hours, which can shorten its lifespan and trip thermal protections in the unit itself, not just the car.
• Circuit and panel capacity. Charging equipment run at its limits in extreme heat puts more stress on your home's electrical system. A properly sized circuit, installed by someone who accounts for Florida's temperatures, keeps things running safely instead of tripping breakers on the hottest day of the year.

Why This Is an Electrician's Job, Not a Weekend Project

We say this about a lot of things at Anthony's, and it's just as true for EV chargers: getting the installation right the first time saves you headaches later. A charger placed without Florida's climate in mind might work fine in October and then underperform — or overheat — every July and August. That's not something you want to find out after it's already installed.