What to Check on a Naples Home's Panel Before You Buy It (If an EV's in Your Future) | CoHarbor Electric

Had a couple call us in during their inspection period on a place in East Naples last winter — lovely house, updated kitchen, new roof, all the boxes an agent loves to check off. They weren’t EV owners yet, but the wife mentioned, almost in passing, that they were “probably going electric” for their next car in a year or two. Good thing she mentioned it, because the panel in that garage was a 100-amp Federal Pacific unit that had clearly never been touched since the house was built in the late ’70s. Nothing wrong with it in the sense of an active hazard that day. But it had zero room for a Level 2 charger, and honestly, not much room for much else either.

That’s the situation we see more often than people expect — buyers who are thinking ahead about an EV, touring homes, and having no real way to know just by looking at a panel whether it’s going to support one down the road or turn into a $2,500 surprise six months after closing. Home inspectors check panels for safety and code compliance. They’re not typically evaluating whether there’s headroom for a future 40-amp EV circuit. That’s a different question, and it’s one worth asking before you’re past your inspection contingency.

Why This Matters More in Naples Than People Assume

A lot of Naples’ housing stock spans a wide range of build eras — older homes near Port Royal and North Naples that have had decades of add-ons and appliance upgrades layered onto original electrical service, alongside newer construction in areas like North Naples and out toward Golden Gate that came in with modern 200-amp panels from day one. The gap between those two situations is significant, and it’s not something you can eyeball from the listing photos.

Add in that EV adoption keeps climbing across Collier County, and “does this panel support an EV charger” is quickly becoming as relevant a buyer question as “how old is the roof.” Nobody wants to find out the hard way, three months after moving in, that the panel that looked fine from a glance actually needs a full service upgrade before a charger install can even get permitted.

What We’d Actually Look At During a Pre-Purchase Walkthrough

The Panel’s Rated Capacity

This is step one, and it’s usually printed right on the panel door — 100 amp, 150 amp, or 200 amp service. A 100-amp panel isn’t automatically a dealbreaker, but it does mean there’s a real conversation to have about what else is running on that service before an EV circuit gets added. A 200-amp panel gives a lot more breathing room, though even those can be maxed out depending on what’s already installed.

What’s Already Using That Capacity

Age of the AC system, whether there’s a pool pump, an electric water heater, a range, any existing high-draw appliances — all of that eats into available capacity before a charger’s even in the picture. We run an actual load calculation per NEC Article 220 to see what’s really left over, rather than just eyeballing the panel rating and assuming there’s room. Two homes can both have 150-amp service and land in completely different places once you account for what’s already drawing off it.

Open Breaker Slots vs. Actual Available Amperage

This is the mistake that trips people up constantly, and it’s exactly what caught that Federal Pacific panel out — an open slot in the panel doesn’t mean there’s capacity behind it. The panel can be full of open slots and still be maxed out on the bus bar itself. We check both, because they’re not the same thing, and a lot of DIY assessments (or, frankly, some inspection reports) don’t draw that distinction clearly.

Panel Brand and Age

Certain older panel brands — Federal Pacific Stab-Lok and Zinsco are the two we flag most often in Naples’ older housing stock — carry known reliability issues that go beyond just capacity. If a home has one of these, it’s worth factoring a panel replacement into your offer or negotiation regardless of the EV question, since insurance companies increasingly ask about panel brand during underwriting anyway.

Permit History on the Electrical System

Collier County permit records can tell you whether the panel’s ever been upgraded, and when. A panel that shows no electrical permits since a 1985 build date is a different risk profile than one with a documented 2019 service upgrade, even if both look similar walking through the garage.

Building It Into the Offer, Not an Afterthought

If a pre-purchase panel check turns up a 100-amp service with little headroom, that doesn’t necessarily mean walk away from the house. It usually means factoring a panel upgrade into your negotiation — either as a credit, a repair request, or just going in with eyes open about a project you’ll want to budget for in year one rather than being surprised by it. We’ve walked buyers through this exact conversation more than once during their option period, giving them a straight answer on what a future EV circuit would actually require so they can negotiate from an informed position instead of guessing.

What This Isn’t

This isn’t about talking every buyer into a panel upgrade before they’ve even closed. Plenty of Naples homes, especially anything built in the last decade or so out toward North Naples and Golden Gate, already have 200-amp service with room to spare — no upgrade needed, easy EV install whenever it happens. The point is knowing which situation you’re actually in before you sign, not assuming either way.

A Quick Pre-Purchase Checklist

• Panel amperage rating (check the panel door, not just the listing description)
• Full load calculation accounting for existing major appliances
• Actual available capacity on the bus bar, not just open breaker slots
• Panel brand and manufacture date, checked against known problem brands
• Electrical permit history through Collier County
• Rough estimate for a service upgrade if the numbers don’t support future EV charging

Thinking About Buying in Naples? Get the Panel Checked Before You Close

If you’re under contract or seriously considering a home and want a straight answer on whether the electrical panel can support an EV charger down the road, Coharbor Electric is a licensed and insured electrical contractor serving Naples buyers from Port Royal to North Naples to East Naples and everywhere between. We’ll run the load calculation, tell you honestly what the panel can and can’t support, and give you real numbers to negotiate with — before closing, not after. Reach out during your inspection period and we’ll get you answers while you still have time to use them.