Curious how the Open ReVolt has operated for you, is it noisy like the curtis or jerky like a logi controller. I have been looking at the synkromotive contoller but $1612 plus shipping to Honolulu Hi kinda steep for me right now. Other Questions, do you need to add a heat sink, pre charge resistor or is it all incuded.
I've been using the controller for almost a year now in it's basic kit form (no other mods, other than the heatsink I had that it's mounted on). It has survived an AZ summer with 110F heat. In the 10 months I've had it installed, I've put 4500 miles on the controller so far.
It makes no audible noise - 16khz switching frequency at all throttle positions.
The throttle sensitivity can be customized, but since throttle controls output current (torque), it is very smooth. The problem with curtii (and logi?) is that they control voltage (PWM). So, at a dead stop, a little bit of throttle is just a little bit of voltage, but that's enough for huge amounts of current (torque) which leads to jerky starts. If you control current (torque), you control how smooth it is.
I used a heatsink I got on ebay. I run 144v worth of batteries. At 200A continuous output (cruising for me), it'll operate at +12C relative to ambient. It also has temperature sensing to power back if it's too hot. I haven't experienced that yet, even with AZ summers, but I also try to keep the amps low by keeping rpms high.
You need a precharge resistor, but those are cheap. It does have automated contactor control, but you'd have to defer to jack for questions about that. I never set it up.
Once i started from a stoplight uphill and forgot I was in 2nd gear. The output was pegged at 500A for maybe 15 seconds straight. This was a few weeks ago, so it wasn't crazy hot out, but i think it still says a lot about the controller. The curtis I had would never do that...
You will be responsible for your own work, but I think it is safe to say that the design has been well tested and verified. It's just up to you to assemble it correctly.
I'd definitely recommend this controller as a substitute for any 144V 500A controller with superior performance.