The big line item
Electrical panel upgrades for EV charging
"You'll need a panel upgrade" adds $1,800–$4,500 to a project — and it's true less often than it's quoted. Here's when the upgrade is genuinely required, the three legitimate ways around it, and who pays for it when it is.
The test
The load calculation decides — not the panel's age
Whether your service can absorb a charger is pure NEC Article 220 arithmetic: home square footage, fixed appliances, HVAC, and the charger at 125% of its amperage, netted against your service rating. An electrician runs it in twenty minutes. Everything else — including a quote that skipped the math — is guessing. Full walkthrough in the load calculation guide.
Quick priors while you wait for the real math: 200A service passes almost automatically. 150A usually passes with gas heat. 125A is genuinely borderline. 100A frequently fails for a 40–48A charger — and is exactly where the alternatives below shine. 60A (pre-1960 homes) should upgrade for reasons far bigger than the EV.
Before you pay
Three alternatives, cheapest first
Dial the charger down — free
Adjustable chargers set to 16–24A still add 12–23 miles of range per hour: a full overnight recharge for typical commutes. The load calc counts the set limit, not the nameplate maximum.
Load-management device — $350–$900
Monitors the panel in real time and pauses charging during peaks. NEC-sanctioned, inspector-accepted in a growing majority of jurisdictions, built into some chargers (Wallbox Power Boost, Emporia + Vue). The 48A-charger-on-100A-service trick, done legally.
Smart splitter — $300–$500
Shares one existing 240V circuit between two appliances (dryer + charger) with automatic switching. On PG&E's approved rebate list. Only fits plug-in chargers on existing circuits — but when it fits, it's elegant.
When it's real
The upgrade itself — and who pays for it
Scope: a 100A→200A service change replaces the panel, main breaker, and often meter equipment and grounding; the utility coordinates the disconnect/reconnect. Cost lands at $1,800–$4,500 in most markets (higher where the service drop or mast needs work), and the calendar runs days to weeks because two organizations are involved.
Upgrade anyway if: the panel is full of tandem breakers, it's a recalled brand (Federal Pacific, Zinsco), or a heat pump / induction range / ADU is on your roadmap. Doing it once for everything beats doing it twice.
Who pays: income-qualified households in Southern California can get up to $4,200 through SCE Charge Ready Home — often covering the entire job. PG&E's Empower EV pays up to $2,000 for eligible customers. Several Colorado co-ops (United Power's $500 panel rebate among them) chip in too. Check your state page before paying out of pocket — panel money is the most underused rebate category.
Electrical work can be dangerous and is regulated by code. This page is educational, not electrical or engineering advice. Hire a licensed electrician and follow your local permitting process.
Get the load calc before the upgrade quote
Ask bidders to include the Article 220 worksheet — a quote without it is a guess with a markup.
Finding an installer yourself: ask for the contractor's state license number, proof of insurance, and at least two recent Level 2 installs. Get the permit number in writing.
Use the free permit checklist