Electricity costs are not a tiny fraction of fuel costs. They may be lower, but not insignificant. Even if it was free, at 10,000 miles a year you only spend about $3600 in gas and I don't even drive that much. It would take me 10 years probably to recover a $5000 difference and we don't get any state credits, nor do I qualify for a full $7500 federal credit so it would be more like a $10,000 difference and take me more like 30 years to break even considering electricity isn't actually free.
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