I don't know of any kits. You would need:
L A R G E battery - Li-ion for preference
A new mechanical transmission system
Control system including regenerative braking, etc
To change heating/air conditioning
Major revisions to vehicle suspension
And all the other things I've omitted
The electricity with which you charge the battery will probably be generated
in thermal stations, or maybe nuclear. If you're really lucky it will be
from a hydro plant.
Alternatively, if you want to fool yourself you're helping the environment
you could buy a hybrid.
Yes, there are kits available for some cars, VW Rabbit/Golf for
instance. See http://www.electroauto.com - not the only seller of such
things but a good start.
To see a successful DIY effort, check out www.kiwiev.com.
Most successful conversions that I have seen use lead-acid batteries,
but while these work OK, they do suffer from the twin problems of
weight and limited battery life (300 - 500 cycles).
Lithium-ion batteries are now starting to become more readily
available, Thundersky is one brand that looks very promising. Li-Ion
batteries offer less weight than lead-acid for the same capacity, and
if the manufacturer's claims bear out they should last for 2000+
Performance of the converted car will depend on several variables,
mainly battery capacity and motor power.. A good performance envelope
to aim for is to get better than 100 kph (60mph) maximum speed, and to
be able to maintain that speed for better 1 hour on a charge.
Polytechforum.com is a website by engineers for engineers. It is not affiliated with any of manufacturers or vendors discussed here.
All logos and trade names are the property of their respective owners.