The plug-in electric vehicle fleet in California has grown rapidly over the last few years, partly down to the substantial support that the government there provides, though partly due to the presence of companies such as Tesla, a greener focus in the state, wealthier citizens, and associated culture. According to the California Plug-In Electric Vehicle Collaborative, the state’s plug-in electric vehicle fleet will be surpassing the 250,000 units milestone sometime this month — just in…