What to know
- An EV charger is a continuous high-amperage load — the panel must have verified capacity, not guessed capacity.
- Grounding & bonding must be correct: the charger's safety depends on a proper path for fault current.
- A surge arrester protects the charger's electronics — and your car's onboard charger — from grid and storm surges.
- Permits and inspection aren't red tape: unpermitted charger installs can void insurance and complicate a home sale.
The four parts of a proper installation
A charger on the wall is the visible 20% of the job. The rest:
- The charger — correctly sized (40–60A typical), on a dedicated circuit, with the right wire gauge and termination torque.
- The panel — a load calculation confirms real capacity; many older Puget Sound panels need a subpanel, load management, or a service upgrade first.
- Grounding & bonding — verified ground electrode system and bonded metallic systems so a fault trips the breaker instead of energizing your car's chassis.
- Surge arrester — a panel-mounted SPD shields the charger's electronics and the vehicle's onboard equipment from surges.
Why grounding & bonding gets its own line item
Grounding and bonding are the parts of a four-point inspection that insurers care about most, and for good reason: they're what makes a fault safe. An EV charger pushes sustained current through your home's electrical system; if the grounding electrode system is corroded, disconnected, or was never right, fault current has no reliable path and protective devices can't do their job. We verify and correct grounding & bonding as part of every charger install.
Permits protect you
EV charger circuits require an electrical permit and inspection in Washington. Skipping it saves a little now and costs a lot later: unpermitted electrical work can void homeowner's insurance after a fire, fails four-point inspections, and stalls home sales. Eco pulls the permit, meets the inspector, and hands you the documentation.
Ready for the next step?
Talk to a licensed Eco pro — honest guidance and upfront pricing before any work begins.
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Common questions
Can my existing panel handle an EV charger?
Only a load calculation says for sure. Many homes have the capacity; many older 100–125A services don't. Options include a smart load-management device, a subpanel, a SPAN smart panel, or a service upgrade — we'll price the path that actually fits your home.
How long does a professional EV charger installation take?
A straightforward install with adequate panel capacity is typically half a day. Add time for a subpanel, service upgrade, or a long conduit run to a detached garage. Permitting timelines vary by jurisdiction; we handle the paperwork.
Do I really need surge protection for a car charger?
We strongly recommend it. The charger and your vehicle's onboard electronics are exactly the kind of sensitive, expensive equipment surges destroy — and Puget Sound windstorm outage/restoration cycles are a steady source of surges.