Here at our shop in Bellingham WA we have been finding the EV batteries to be the most challenging hurdle in building a solid
and long lasting EV. In our experience while using any battery type what we find is that in a small commuter car driving at 50 mph
with a 120VDC nominal battery pack that the amperage at the motor is about 200ADC. This same amperage is flowing across the
vehicle’s battery pack. If the battery pack is set up as one series string of batteries then each battery in the system is also being
hit with 200ADC. Most batteries are not designed to handle a 200A constant discharge current.
We are presently using NiCad’s in our personal vehicles. The batteries we are using are designed to handle 300ADC constant and
can handle 900ADC peak.
If you intend to set up a system using Lead based batteries you may need to seriously think about setting up the pack to have
multiple strings of batteries. This will divide the current across the batteries by the number of strings of batteries you set up.
For a conversion quote please submit our on-line quote sheet.
Lithium Batteries: Prices of Lithium batteries have come down substantially the last four years.
These batteries are readily available in a vast range of pricing from both domestic and imported sources.
10 Year life expectancy.
Optional Lithium Battery Conversion Add on’s: BMS, Charger.
Nickel Batteries: NiCads & Nimh batteries. These batteries are cheaper than Lithium batteries
and are readily available from domestic sources. Nickel batteries are what all of the major automobile
manufacturers are using in every hybrid & pure electric vehicle built in the US and overseas since the
early to mid 1990’s. EVWA has an inventory of NiCads as well as NiMh batteries. These are our battery of choice for our personal vehicles as well as the vehicles we convert. We offer a variety of charging methods with or without integrated BMS & watering systems.
Lifetime is presently undetermined. Batteries in use today have been in use since the early 1990’s.
Optional Nickel Battery Conversion Add on’s: BMS, charger, watering system.
Lead Batteries: Lead based batteries from “Golf Cart” batteries to sealed AGM EV batteries rang from cheap to expensive. They are three times heaver than Nickel, and four times heaver than Lithium.
They last about 2 years before replacement is needed.
Our Hybrid systems utilize only the best generator technology developed by
Ample Technology in Seattle.
A small generator set is sometimes suggested depending on our customers driving needs. However, we would suggest, not to think of the gen set as a means of a constant power source. As the more weight you add to your vehicle the less efficient it becomes. We would suggest a gen set which can be run in conjunction with the battery pack in order to extend drive time while you still have battery power left in your pack. If however your batteries were completely depleted, while you would not be able to run at full speed on the gen set, instead, perhaps at about 40 mph. More of a last resort, Get me home, my batteries are dead scenario.
For a quote please fill out our quote page.
We work closely with Randy @ Ample Power 206-391-0996
2442 NW Market Street, #43
Seattle, Washington 98107
Phone: (206) 789-0827
Fax: (206) 789-9003