Panel & service upgrades, explained in plain English
"You need a panel upgrade" is one of the most common — and most misunderstood — things a homeowner gets told. Sometimes it's genuinely necessary. Sometimes it's a few thousand dollars you didn't need to spend. Here's how to actually tell the difference.
Panel vs. service: what's the difference?
People use these terms interchangeably, but they're different jobs at different prices:
Your panel is the grey metal box with all the switches (breakers) inside — the thing you flip when a breaker trips. Upgrading the panel means replacing that box, often to add more spots for new circuits.
Your service is the actual amount of power coming into your home from the grid — measured in amps. Upgrading the service (say, from 100 amps to 200 amps) means increasing that incoming power, which usually involves your utility and is a bigger project.
Knowing which one you actually need is half the battle, and it's exactly what a good electrician should explain before quoting you.
What the amp numbers mean for you
Think of your home's service like the width of a water pipe feeding the house. 100 amps is common in older homes and is genuinely fine for a lot of them. 200 amps is today's standard for a modern home with lots of electric appliances. 400 amps is for larger homes or homes with serious electric loads — think an EV charger plus electric heating plus a secondary suite all together.
When you actually need an upgrade
The honest triggers are the big electric loads stacking up: adding an EV charger, switching to a heat pump or electric heating, installing central air conditioning, a hot tub, or building a basement apartment or in-law suite. Any one of these alone might be fine. Combine two or three on an older 100-amp service and you genuinely run out of room — and the city won't approve the new work.
When you're being told to upgrade but might not need to
Here's the part that saves people money. The calculation that "proves" you need an upgrade assumes every major appliance runs at full power simultaneously — your stove, dryer, AC, water heater, and car charger all maxed out at the same second. In real life that essentially never happens.
For EV charging especially, a smart load management device watches your home's actual power use and briefly pauses the car charging during rare peak moments — letting many homes add a charger with no upgrade at all, for a fraction of the cost. If someone quotes you thousands for an upgrade without even mentioning this option, get a second opinion. (We had a homeowner quoted $12,000 for an upgrade he didn't need — a load balancer solved it for a small fraction of that. That $12,000 could've bought another car.)
Still have a fuse panel? That's a different story
If your "panel" has round screw-in fuses instead of switches, that's genuinely worth upgrading — for insurance, safety, and capacity reasons. We wrote a dedicated guide: fuse panel vs breaker panel — why older homes should upgrade.
What it costs and what to expect
A panel swap typically runs $2,500–4,000; a full service upgrade to 200A is usually $3,500–5,500+, with 400A higher still. Every upgrade needs an ESA permit and inspection, and a service upgrade also means coordinating a power disconnect and reconnect with your utility — the step where inexperienced contractors lose weeks and where surprise costs sneak in if they don't know the local rules. Knowing that process cold is exactly what we do, so your project doesn't stall and your quote doesn't balloon halfway through.
Not sure what your home actually needs? Send us a photo of your panel — that's often all we need to point you in the right direction, free.
