Porsche 914 EV Conversion

MARCH 21, 2007

I think Lee's battery balancer design would do a great job; however, I'd like to cost reduce it to something more suited to my own needs. If I costed out the parts and boards correctly, I can probably get that down to $100 per relay board vs. Lee's assembled cost of around $200.

Batteries 100

Batteries Battery Convert Volt 100

Porsche 914 EV Conversion

FEBRUARY 18, 2007

The circuit above costs less than $10 per battery in parts and I hope to make this available to everyone to help people make their batteries last longer. It seems to work fine on my bench. By clicking on the images, you can get a much larger version of the pictures.

Golf Cart 147

Golf Cart Batteries Battery Kits 147

Porsche 914 EV Conversion

APRIL 7, 2008

I would like to see the same thing done for a more modern, practical vehicle for much less cost. I really appreciated the high-quality parts and detailed instructions provided by Electro Automotive with their 914 kit.

Kits 100

Kits Cheap Conversion Honda 100

Porsche 914 EV Conversion

FEBRUARY 6, 2008

It cost me $130+shipping and is spec'ed to put out 45 amps, which should be very adequate for running all the 12V accessories in the car. Just the cost of the DMOC445 controller is the same as a 9" DC motor, motor adapter and Curtis controller. Here's the Iota DLS-45 12V power supply.

DC 100

DC Kits Convert Conversion 100

Porsche 914 EV Conversion

AUGUST 12, 2007

With batteries and additional items, the final cost is around $5000. Here are some cool looking Neighborhood Electric Vehicles (NEVs). They run on 48 volts and the company sells them as a kit for about $3500. Not bad for something that has a top speed of 50mph. Here is my (tongue in cheek) arch nemesis John Benson.

Portland 100

Portland Belgium Kits Neighborhood 100

Porsche 914 EV Conversion

MARCH 8, 2007

The OEVA club is looking into this and I hope to cost reduce the system to be only $20 per battery. The schematics and other info is located at the following link: [link] The major drawback of Lee's system is that it's expensive. Perhaps using a PIC microcontroller and slightly lower currents will help.

Volt 100

Volt Purchase Batteries Battery 100

Porsche 914 EV Conversion

MARCH 1, 2008

I hope this pack lasts 2-3 years while the costs of lithium batteries come down. I've only had 50 millivolts of difference between the highest and lowest voltages when I get home from work after 16 miles of driving, so I think the pack is still doing okay.

Oregon 100

Oregon Connect Connected Kits 100