Here is a quick run down of how the Prius and a Plug-In Prius compare. Car: 2006 Toyota Prius Conversion: Hymotion in 2008 Total miles driven: 56823.2 Miles driven Prius: 28665 Miles driven Plug-In: 28158.2 Prius Data Gas used: 501.36 Gallons Gas cost: $1485 Average MPG: 57.2 Average CPM: $0.052 PHEV Data Gas used: 228.56 Gallons Gas cost: $689.10 kWh used: 3884.5kWh kWh cost @ $0.08: $310.76 Total fuel cost: $999.86 Average MPG: 123.2 Average MPGe: 81.8 Average CPM: $0.036 Other data Total gas used: 729.92 Gallons Total gas cost: $2174.1 Total Fuel cost: $2484.87 Average gallon gas: $2.979 Savings over 25MPG car 1543.01 gallons of gas saved $4285.17 in gas saved Projected savings @ 100k miles: $8088.12 ( This continues to go up as I drive with the Hymotion battery. I should reach $10k saved by the time I reach 100k miles.) My guess is that depending on what your commute is you should see similar results with an official plug-in Prius. I really don't have anything else to add. If you have any questions I'll try to answer them.
how is your A123 system holding up? i read here and there little trouble? like plugs and dc-dc converters failing?
The only real problem I've had was the DC-DC converter failing. Other things were the low 12v issue, had to have them reverse the fan wires as it was installed wrong at the factory, and a loose wire on the wire harness which I fixed myself. Other than that it has worked great.
So the plug in saves about 1 - 36/52 = 31% of fuel. If gas stays at $4, and Prius mpg = 50, it will save $4*0.31 = $1.24 for every 50 miles, or $248/10K Miles or $4800/200K Miles The pay back time is a little too long for most people I guess...
