An Elise would make a wonderful conversion.Hello all,
I'm considering a lotus elise or exige conversion (S2)
Car weight ~2057 lb with ICE. Engine is about 140kW
- My mechanical knowledge is minimal but I'm eager
- Hoping for a range of 75 miles
- Performance: 0-60 <5secs, top speed 100mph
- Money :20k for conversion
I see it's been done before a few times
I have read through the wiki's and am suffering from information overload!
- Is this something that can be done on that budget?
- Is this something that can be done by a virgin EV builder?
- Can you recommend some Motor/BMS/Batteries combinations that I can research further
2. Maybe, depending on your level of mechanical/electronics knowledge or capacity to learn quickly
I would recommend a China Aviation pack, perhaps 300V of 100 AH cells, no BMS(don't discharge the pack more than 80%, don't charge to more than 99%), Netgain 9" HV series wound DC motor, Soliton 1 controller, and Zivan NG3 charger programmed for your pack. Limit your battery pack current to 400A(assuming 100AH batteries), turn the motor current to 1000A, and set the motor voltage limit to 192V.
Such a car would likely weigh about 250 lbs more than stock, do 0-60 mph in under 6 seconds, exceed 120 mph top speed, get 100 miles range at 60 mph to 80% discharge, and cost about $20,000 without upgrading it to have the addition of a BMS and better charger. This budget would leave no room for expensive errors, and obviously, would not include the cost of the donor vehicle, would be if everything was purchased new, and assumes you do all of your own fabrication or have free/cheap help for things like motor mounts, battery boxes, adapter plates, couplers, ect. If you find some of the major components used, your cost could be cut dramatically.
If you absolutely want a decent BMS, then swap out the Zivan charger for a Manzanita Micro PFC20 with its integrated BMS for LiFePO4 batteries, and add about $2500-3000 to your cost, and about 25% to your usable range per charge(due to being able to discharge 100% with the addition of a BMS).
If you want AC motor(s) and regenerative braking, you're going to have to compromise on at least one of the 3 criteria mentioned that have nothing to do with your level of skill.