consider this build/thread closed.
My brother was the one who put his foot in and was financing it after I mentioned electric and showed him a few builds and said lets build an electric kart.
Once he saw the estimated cost of $1,878 he cancelled the build even though from the beginning I told him it would be at least $1000. I shopped around a lot and this is as cheap as it could get with quality parts for this performance.
For anyone looking for a build this was my list most of the stuff came from ev-drives and thunderstruck. The batteries I sourced from someone local so that saved a couple hundred dollars. So if you dont have at least $2000 then your build probably wont happen.
Motor ME1003 $500.00
Batteries LiFePo4 Headway 38120 8ah $10 each x 48
Battery Holders estimated $60.00
Controller Alltrax AXE7245 $450.00
USB to RS232 $14.50
Model ED250 Style Switch, with 1000 ohm pre-charge resistor $27.00
New PB-6 Curtis Original Throttle $89.00
72 Volt SW-180 Contactor with 3 Amp Diode and 1000 ohm Resistor $72.50
Wire 6 AWG 30 ft $35.00
misc connectors $150.00
This is my first build and I am new to the ev world. Gonna be on an old kart racing frame with slicks. I have been reading for a month trying to find info on all the ev sites I could find. Finding used parts is very hard if not impossible without months of looking/waiting so I am going used cause I want more power than a bike but less than your typical ev.
Specs looking for are 8+ hp cont and 15+hp max. This is just a fun kart but want to stay around $1000 not including batteries. I am gonna use some free 7amp/hr batteries at 72v for now until I kill then switch to 4 12 amp/hr batteries @48v until they die also. So I know they will hold the performance back until I swap them out
Any and all input is welcome.
Cloud electric seems to be the cheapest and has most/if not all the parts.
Motors are narrowed down to these in order of my perceived preference of the most power:
ME0709 $485 BRUSHED 24-72V VDC, 125 amps Continuous, 300 amps Peak 1 Minute http://www.cloudelectric.com/product-p/mo-me0709.htm
Recommended by someone on endless sphere but I dont think it meets my specs plus the controller is more exspensive.
ME4201 $394 BRUSHLESS 24-72V VDC, 90 amps Continous @ 48v http://www.cloudelectric.com/product-p/mo-me4201.htm
ME0909 $374 BRUSHED 12-48V VDC, 100 amps Continuous, 300 amps Peak 1/2 Minute http://www.cloudelectric.com/product-p/mo-me0909.htm
ME0907 $394 BRUSHLESS CONTROLLER EXSPENSIVE http://www.cloudelectric.com/product-p/mo-me0907.htm
Cloud has a package deal with controller but u only get about $12 off and they max at 300amps so package deal doesnt look so good. Shouldnt I go bigger on the controller so it isnt maxed with the ME0709? Like say a 400+ amp controller. Plus if I ever go with a bigger compatible motor in the future I would like to not have to buy a bigger controller.
Looking at Kelly or Alltrax.
Is regen or reversing worth it? I dont understand the specifics of making them work yet. Regen benefits seems a moot point though.
Some type of emergency disconnect like an Anderson plug style?
EDIT: I found a nice diagram from alltrax on another build thread
and the site with all of their documents