Allow me to introduce myself. I'm Colonel Monk, and I've been lurking here a little bit for a year or more.
I'm doing my own EV based on a chinese bike rickshaw. It's 3 wheeled, and weighs about 150 lbs unladen. It need's only to travel 5-10mph, nothing faster, as it's domain will be the dry lake bed at Burning Man festival in Nevada.
I've decided on an etek-style brush motor (one of the cheapies - Manta I believe) and so I'm now moving on to figuring out what controller to use, etc...
24V systems seems to be the most common - but I don't need speed, I need range. I'd like to do 12V and here's why:
-I have 4 - 12v 85Ah Deep Cycle Batteries in my Motor Home for a total capacity of 340ah. These will be located in a wagon being pulled by the rickshaw.
-I already have 12V smart chargers - one is a 2000W Magnum Energy inverter for RV - it doubles as a 4 stage battery bank charger with an output of up to 100amps for fast charging. I already have 600 invested in that.
Are there motor controllers out there for 12V that could do say up to 50 amps? Preferably programmable as I'd like to set it for economy and be able to set the top speed.
Am I missing something? If I use 24v controller can I get the same range from the batteries or will I definately get more from using 12v?
Is there any way of running in 24V and throwing a switch to charge in 12V?
I'm also wondering how to figure what sort of range I can expect, given a total weight (rickshaw, wagon, batteries, people) of around 1500 lbs. All wheels will be 26" Bicycle wheels (but with super thick 1/8" spokes...)
Any help to get me started would be appreciated.