Frequently Asked Questions
Is home charging always cheaper than public DCFC?
Yes, in most cases. Home electricity typically costs $0.10-$0.20/kWh, while public DCFC costs $0.30-$0.55/kWh - 2-4 times more. On a per-mile basis, home charging usually costs $0.03-$0.06/mile; DCFC costs $0.10-$0.18/mile. The exception is if you have access to workplace charging or free public charging.
How long does a typical home Level 2 charge take?
A 7.2 kW Level 2 charger adds about 25 miles per hour of charging. A 75 kWh battery at 20% charge needs to add ~45 kWh to reach 80%, which takes about 6-7 hours. A 19 kW charger can do this in 2-3 hours. Most owners simply plug in when they get home and have a full charge by morning.
What does it cost to install a home Level 2 charger?
A standard 240V/32A Level 2 EVSE unit costs $200-$700 for equipment. Professional installation adds $200-$800 depending on panel capacity and wiring distance. Total cost is typically $400-$1,500. Many states offer rebates or tax credits for home charger installation, and some utilities provide free units to customers.
How does charging affect battery longevity?
Avoiding regular 100% charges, minimizing DCFC use (particularly above 80%), and not regularly depleting below 10-15% all extend battery life. Battery degradation in modern EVs is typically 10-20% over 10 years under normal use conditions. Most manufacturers warrant batteries against excessive degradation (below 70% of original capacity) for 8-10 years.
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