Sorry it took a while to get back===the problen is you cant generate enough current to replace what you use the batteries in an elect car are different from a standard car batt. they are deep cycle batt.s they are designed to deliver higher levels of current without over heating as much some of the newest batt tech comes from panasonic for use in japans elect cars the other is nickel metal hydride which GM promply bought up and then would not use them in their very successful electric car ---instead they crushed them all this includs honda toyota chrysler ford and i think nissan---as the batt tech and current generators tech increases so will their range the current range depends on how you drive the more frugal you drive the better the distance ===this may help batt.s are rated by ampeerhour in short if a batt is a 50amp hr it will deliver 1 amp for 50 hr.s or 50 amps in 1 hr the higher rate of discharge current falls off because of internal heat i hope this helps somewhat keep an eye out for panasonic's batts. hopefully they will be offered to US consumers

