also i forgot that if u only have 20,000 per cell it would last only a decade ( due to loss) but still if it powers ur car and house i think 7200 is worth it becaues ud save that much on just ur electric bill in three years
plus gas 1200 in a year if you drive on one gallon a day and no driving on weekends
you would save 27,000 in that decade so with a car like this and a few solar panels on the back of ur garage every one could be off the fossil fuel fired grid