2004 Cleaner Convert San Francisco 
Plugs and Cars
OCTOBER 27, 2007
The catalytic converter that keeps the ICE from being a gross polluter in conventional cars and hybrids however, isn't kept warm by the continual embrace of an ever-churning engine in a hybrid with all-electric range. Third-party and DIY converters can't muck with every system on a car. Cold starts mean more pollution.
Revenge of the Electric Car
JANUARY 22, 2009
3Prong Power converts existing Toyota Priuses into plug-in hybrids that can run entirely on electricity. They convert Toyota Prius hybrids into mostly electric vehicles that get 100 to 150 miles per gallon. It takes 3Prong Power a little more than a day to convert a Prius to a plug-in, and costs customers about $6,700.
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