According to what I have read here and on the product websites, it seems each provide features that are necessary for EV's, but using both can be pricey and will provide some redundancy.
Pro's of the Cycle analyst:
Volt/Amp & Speed readouts
control capability over the controller output.
accumulative data storage.
no individual battery monitoring
no data logging or PC interface
Cycle analyst price (high current model)
Individual battery condition readout
battery bay temp readout
no speed readout
Amp readout costs $50 for sensor (not required if used with Cycle analyst, but if you want to data log Amps, you will need this)
data logging and PC connection=$80
Total w/o Amp reading=$230
Total with Amp readout=$280
So for both systems, you are looking at $430-$480 bucks.
None of these are mandatory, but.... none? One? both?
Thanks in advance.