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Old 07-24-2011, 04:53 AM   #4956 (permalink)
Join Date: Mar 2010
Location: New Zealand
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Originally Posted by electricstorm View Post
Thanks Paul.

I may just go ahead and get the 500 amp version then. I am converting a 92 Geo Storm and will most likely use a 120v pack. My thinking was if I got the 1000 amp controller, I would have lots of leeway if I wanted to go to a 144v pack. Or, maybe later, transfer the 1000 amp controller to another vehicle if I wanted to build another ev.

I think the 500 amp controller will probably work for me just fine since it will just be driven around town with very liftt, if any, highway use. What are anyone's thoughts on having more leeway as far as amperage or have the majority experienced ample power from the 500 amp controller? Just wanted some feedback before dedicating funds. I do know that the Open Revolt charger is the best deal around. Guess you can tell I'm sorta new to all this.

A 1000A controller is actually better around town!
It gives more acceleration because of more torque, but the top speed is the same. Remember, amps = torque = acceleration while volts = rpm = speed.
A 144V battery will give the same top speed with either a 500A or a 1000A controller, but the 1000A controller will get there much faster.
I have screwed my 500A controller up to do 625A by altering the current sensor and it has been doing that just fine for a couple of thousand kms now. The acceleration is 0 - 50 mph in a bit over 10 seconds while it took 12 seconds when limited to 500A (actually 512A). I used to have a 1000A controller (LogiSystems) and that did the job in about 8 1/2 seconds until it blew up. I have a set of boards from Paul for his 1000A controller, but haven't gotten around to building it yet.
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