A Level 1 cord in a standard outlet adds a few miles an hour and is enough for some commutes across the I-74 bridge. Most households want a Level 2 charger on a 240-volt circuit that refills the car overnight. What that costs in Rock Island County depends almost entirely on two things: how far the garage is from the panel, and whether the panel has room.
Panel capacity decides the job
A charger on a forty- or fifty-amp circuit is the single largest new load most houses in this county have added since central air. On a 200-amp service with open slots it is a straightforward circuit. On a 100-amp service in a Rock Island bungalow that already runs an electric dryer and a window unit, the load calculation may say no, and the choices become a service upgrade, a smaller charger, or a load-managing charger that throttles itself when the house is busy. The electrician runs the calculation before quoting so the answer is the real one.
Garages, driveways, and detached buildings
An attached garage next to the utility room is the cheap case. A detached garage behind a Moline or Rock Island house on the alley is the common case, and it means either a buried feeder across the yard or, where the garage already has a subpanel, checking whether that feeder can carry the charger. Driveway charging on a house with no garage, frequent in the older wards, uses a weather-rated unit on the exterior wall with the cable managed so it stays off the sidewalk. Rentals in East Moline and Silvis with shared parking are quoted with the landlord on the line, because the question of who pays for the electricity matters more than the circuit.
Hardwired or plug-in
Chargers come as plug-in units on a heavy-duty receptacle or as hardwired units. Hardwiring is cleaner and avoids a receptacle that was never meant for daily heavy load; a plug-in unit is easier to take when you move. Either way the circuit gets ground-fault protection, the breaker is sized to the charger's continuous rating, and the city inspector signs off on the permit. The quote covers both options.
Two cars, and what comes next
Households replacing a second vehicle often want two charging points, and the honest answer is usually one circuit with a power-sharing pair of chargers rather than two full circuits. That conversation belongs in the same visit as the panel review, because a house heading toward two EVs and a heat pump is a house heading toward 200 amps, and it is cheaper to plan the service once.