Our objective is to make your car meet your application. An EV can be designed for
range or speed. They are mutually exclusive when you are using lead acid (PbA) batteries.
Range requires battery weight; approximately 15 lbs of PbA batteries is required
to obtain one mile in range. Typically, it takes 800 lbs of PbA batteries to 40
miles in range.
At this time, we do not recommend Lithium Batteries. They are light-weight, but they
can be expensive ($20,000). The major reasons, EVA does not recommend Lithium batteries
• The added expense of Lithium batteries cannot be economically justified.
• There are no major battery companies (Trojan, Deka, Interstate, etc.) that supply
Li batteries. Most Lithium batteries are from China.
• There is insufficient field data to support the claims. One lithium pack lasted
• Without a reputable supplier we question which company will honor the warranty.
Some customers may be offended by our recommendation against Lithium batteries at
this time. We simply say that after 20 years in the business, we have seen numerous
EV Industry companies come and go. Our recommendation is to protect the EV consumer.
There are two distinct considerations when converting an automobile. First, where
will you locate the batteries. Second, to keep the weight under the Gross Vehicle
Weight Rating (GVWR) of the vehicle. The GVWR is posted on the door jamb of the
vehicle. Our technical papers “Safety First” and “Selecting a Vehicle for Conversion”
provides more details.
To help your EV project succeed from the start, EVA provides:
• Free Calculations based on your requirements. The calculations will identify
the recommended hp, the voltage, current, and range based on a specific battery pack.