Charles, thanks, updated.

You may want to update the Brammo Enertia price on this site... it's now $7995 (you have it listed for $11,995).

larry - We do include the option of the federal $7500 incentive. You could potentially use the Maintenance Savings box to include additional incentives - I'll look into adding another cell.

Steve - we do not currently have a way to add this cost. I will add a new cell re: larry's comment above where you could do this. Battery replacement is hard to estimate right now, but the rule of thumb is that lithium ion batteries cost at least $600 per kilowatt-hour so you could use that to estimate replacement.

Currently we don't have a method for entering in your own numbers for a vehicle, but we're working on it.

TimeHorse - In the advanced options you can choose a driving profile with large ranges which will help make the calculation more realistic for your situation.

Pete - Yes, it does factor in recharging costs.

A Robinson - it is difficult to correctly account for every driving situation. I will review the calculation to make sure it is accurate for range extending plug-ins. If you have any code corrections, they are welcome.

This calculator is not very accurate or trustworthy. Let's say I travel 40 or less miles every single day. That would be 14560 miles or less per year. Now select Chevy Volt and see how much oil I would use. It should be zero because the Chevy Volt has a 40 mile range in which it would use electric power only, yet this calculator shows up to 8 bbl of oil used. Obviously wrong!

I also checked the error console when loading this page and it is chock full of programming errors (javascript). I see lots of "test for equality mistyped as assignment" errors, which is a beginning programmers mistake. I'm surprised with all those errors that the page even runs!

Does this factor in the cost of electricity to recharge the battery in a vehicle like the Chevy Volt?

I usually drive about 75 miles PER DAY because my work is 37.5 miles away! How do I calculate that?

Also, is there anyway to determine EV kits lifetime cost for Civics, Porsche, etc...? For example www.evPorsche.com sells Electric Porsche...how can these type of vehicles be accounted for?

What is the best way to determine cost of "battery" replacement for EV transportation? Is there a way to add this cost?

Can we add in tax incentives to the calculation or put in a seperate column, as they will eventually expire.... also, any chance of making this location specific, as the tax incentives vary by location and the electricity generation varies by location.

Michael, Honda Civic NGV added.

Can you add the Honda Civic NGV to your List?

Much less CO2 for electric if you live in Seattle and use night time hydroelectric power only.

Thanks again for the additions! Keep up the good work!

Can you add the Daimler / Tesla Smart Car BEV that is soon to be leased to customers in the EU?

I noticed that the price of diesel for the TDI doesn't change with the price of gasoline. Can you add a diesel to gasoline spread?

No question - electric has it al!

Paul, added a 2002 RAV4 and 2002 RAV4 EV. The high initial cost of the RAV4 EV compared to the regular RAV4 did not make it a good choice (not to mention the $26,000 replacement battery).

How about a VW Jetta TDI Elsbett PHEV fueled with PV- and wind-powered electricity for most drives and vegetable oil, biodiesel and petro-diesel for longer drives?

It would be good to add the Toyota RAV4 EV. There are hundreds still in use around the country and therefore good data on how much energy they use compared to the ICE RAV of the same year.

Ed- it does take into account electricity prices. Currently the rate is set at a national average 11c/kwh. If you click advanced options you can adjust this to your specific rates. Let me know if you have any other questions.