Did you read the entire post to which I was responding? $7000 for a battery, the life of which is 8 years, is roughly $900 a year. Add that to $800 a year for gasoline, and VIOLA! $1700. Nuthin new about that math.
$800 is for a month of electric (PG&E) or $9600 per year, plus the $900 for the batteries per year.
That means about $10,500 a year, which is equal to about 210 fill ups of a 20 gallon tank at $2.50 a gallon. That doesn't sound so reasonable.
Of course these numbers are all based on someone's guesstimate of a $800 per month electric bill. I have no idea whether that number is reasonable or not.
And who is Viola??? (kidding)