01
Nov

SEMA 2011 in Las Vegas

Written by admin. Posted in Build Diary, e-CarE46, Test

Latest version of EVDrive-train(tm) 150kw-25kwREX

Our first OEM, Michel MotorSport, displayed their first sports car with this EVDrive-Train at SEMA 2011.  More information see our new page

25
Oct

Phase 3 of project

Written by admin. Posted in Build Diary

Initial prototype/proof_of_concept will be with our prototype 25kW Range Extender a.k.a. REX housed in the spare tire well as an optimized “onboard generator”, much different from generators you see at hardware stores and able to power the car at highway speeds with some headroom for occasional aggressive driving activities.

The battery pack becomes a charge “buffer” as this generator is actually another AC motor running in Regen mode, efficiently putting charge directly into the BMW battery pack as the drive motor is taking it out (or fast charging while stopped). (We plan to offer our own custom designed compact REX units which will be able to mount right on the vehicle for many applications – we have 2 sizes of REX units in development at the moment – one for our street e-motos and one for this BMW 3-series class of e-vehicle)

25
Oct

Phase 2 of project – Solar (PV) Electric “fueling” a.k.a. “free miles from the sun”

Written by admin. Posted in Build Diary, Build Diary, e-CarE46, e-MotoCRF250R, Solar

NOTE: IF YOU WERE LOOKING FOR LATEST ON e-CRF CONVERSION KIT – CLICK HERE

With a modest solar array, approx. 11×33 feet, mounted on the south facing roof of the house, the net average cost to drive 40 miles daily is $0 annually, in fact, our founder driving the electric BMW325i , is currently achieving a net positive in power generation.  Not only is this electric BMW325i now higher performance in every way, it is also being fueled 100% by sunlight, truly Net-Zero on energy!  On the R&D lab/shop, a 5.6kW rooftop mounted and grid tied solar array delivers 17,000 miles worth of driving energy annually in the Portland Oregon area.  The solar array puts its power onto the grid during on-peak time, where the BMW’s battery pack is charged during off-peak time at almost half the cost. With solar and “Time-Of-Use” power billing, a profit is made in addition to the 17,000 miles of free driving that covers the cost of tire wear, which is the only real service the vehicle has after the conversion.  With a power inverter directly connecting the solar array to the electrical grid, the power meter spins backwards during daylight hours. When you come home, you just plug into the AC outlet and take back the power you generated during the day. This is very beneficial to the power grid by helping reduce the peak load during the day as a side benefit.  You can size the solar array to match the power used in your normal daily drive.

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Regarding the amortization of our EVDrive, Oregon shop PV array factored into the cost of driving the EVDrive BMW, we have accounted for it.   In our case, the system cost after state and federal incentives was $4300 out of pocket cost.   To get the $10,000 grant money from the Energy Trust of Oregon, we are required to meet at least 75% solar exposure.  Since we had tall trees reducing the exposure below 60%, we needed to remove enough to get up to around 80%.  The harvest resulted in 3 full log truck loads of straight fir log sections that returned $4600, prior to taxes.  So our out of pocket expenses are already paid for.

We are currently on track to put greater that 5MWhr onto the grid this year (with a few weeks of best solar of the year we are at 4.7MWhr now).   This results in over 17,000 miles of driving the EVDrive BMW per year, calculated by multiplying 3.5 (miles/kWhr) times kWhr (solar onto grid -which includes charging efficiency going into BMW pack.)

Now, to reconsider the emission profile with the solar array just mentioned above, there are no emissions. None. Not even battery cells venting. In fact, there will be little brake dust left behind with most of braking done with regen control now affixed near hand brake.

25
Oct

The First EVDrive-train™ Car Conversion Project – 2011

Written by admin. Posted in Build Diary

This project leverages off the known properties and traits of the classic and award winning best sports sedan in it’s class, the BMW 3-series sports car without compromising anything. In many ways the final converted car is better than the original gas/petrol burning original.

The vehicle was purchased and it’s performance was measured with 5 runs at Portland International Raceway drag strip on Aug 17, 2007. Major EV components were selected and the conversion officially began on Sept 1, 2007 when the gas engine was pulled.

This design does not rely on future technology. It is comprised of current production high performance EV components. The one element that has been missing from the performance electric market until recently: the battery.

25
Oct

AC Power Source Select Relay

Written by admin. Posted in Other Details

Here is the finished packaging of the Air Conditioning motor controller, where I happen to be sharing the mounting opportunity for this smaller box that houses the AC select relay.

This turns out to be an ideal location for this function and I had just enough room to clear.  

The inactive port is always electrically disconnected to remove any hazard from exposed metal contacts when the other port that has power coming in.

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