Home vs Public EV Charging

Residential electricity is priced like a utility: regulated, predictable, and cheap. Public DC fast charging is priced like convenience: unregulated, variable, and expensive. That is the whole underlying reason home wins nearly everywhere. The spread between the cheapest state (Missouri, 11.8¢/kWh) and the most expensive (Hawaii, 39.8¢/kWh) is nearly 3.4× — but the spread between the cheapest public network (Francis Energy, 28¢/kWh) and the most expensive (Electrify America base, 48¢/kWh) is only 1.7×. State-level residential rates have more variance than network rates.

For most drivers, the real decision is whether home charging is feasible, not whether it's cheaper. If you own a home with a garage and a 200-amp service, a Level 2 EVSE install runs $500–$1,500 including the electrician. Cost recovery is fast: at 50 sessions/year and the national average $$9.90 per full charge at home vs $$16.80 at the cheapest public network, you save roughly $345.00per year — the install pays back in 12–24 months. If you don't own the home or have no dedicated parking, the math changes entirely.

Apartment and condo dwellers face a different calculation. Without home charging, your realistic mix is workplace charging (often free or subsidized), destination Level 2 (grocery, restaurants), and occasional DC fast charging on longer trips. At a 60% workplace / 30% L2 destination / 10% DCFC blend, effective cost-per-kWh typically lands around 20–25¢ — still well below gasoline equivalent, but 40–60% higher than a homeowner paying national-average residential rates. The convenience of home charging is its real value, not just the cheaper electricity.

Time-of-use (TOU) and EV-specific utility rate plans change the math meaningfully. Utilities in California, Texas, New York, and most of the Pacific Northwest offer EV rate plans that charge 6–10¢/kWh between midnight and 6 AM. If you schedule your EV to charge overnight, these plans cut home charging to roughly 50–60% of the state residential average. At a California TOU rate of ~9¢ off-peak versus the 30.3¢ state average, a Tesla Model Y full charge drops from $21 to about $6 — the single biggest cost optimization available to most EV owners. Check your utility's EV rate page before your next billing cycle.

The breakeven for home solar is longer but real. A 7 kW rooftop array in a sunny state generates roughly 10,000 kWh/year — enough to charge a typical EV 14,000+ miles and still cover some home load. At current install costs ($2.50–$3.50/watt before incentives) and federal tax credits, payback for EV-heavy households is 6–10 years, after which your effective charging cost is close to zero. Solar-plus-EV is the only realistic path to free charging for most US drivers.