at 22000 miles per year, my average over the last two years, I am spending over 6 grand per year on fuel at 14 miles per gallon average. so... I am thinking about plans for an electric hybrid boxvan. 70mph top speed, 40-50 batteries, 125 mile range on electric, 14 foot box. has electric motor mounted aft of transmission, so while transmission is in neutral and engine is running all accassories and a/c, the electric motor can propel the van. If you run out of battery power and need more range, the transmission can be in drive and use the engine. I saw a newer Dodge Ram that was built like this on ebay, and with 12 batteries he was getting over 50mpg in mixed driving with a 40-75 mile range on battery only. he used the gas quite a bit above 40mph. he said he spent about 6 grand on the conversion, so i am looking to double that or so for more battery power, plus 4 grand or so for the donor used truck. The tough trick is the batteries. The GOOD ones that have a 2000 recharge cycle are crazy expensive lithiums. to properly outfit the boxvan, the battery pack would be almost 25,000 bucks alone. but it would last 10-12 years. so 2500 per year for batteries eats up alot of savings. going with optima cells gets you closer to 6000 bucks for your pack, but they may only last 500 recharges, or 2-3 years, so again, 2-3 grand per year for batteries. Nickle metal hydride is smack in the middle. I'm thinking optima. the cost of electricity per mile is around 3-4 cents, so 600-700 bucks per year to recharge. plus i still want my a/c, power brakes and steering, plus the ability to take a trip beyond 125miles , so I'm still burning some gas. what do you guys think? does gas have to be 5 bucks, 6 bucks before this makes sense? or ever?