Olemetry PM'ed me this:
For what it's worth: Joseph at EM3ev replied with a bunch of info, but also said this:
"We do have the 13S (46.8V nominal) Preditor battery pack. If you can wait until the end of this month/early May we are hoping to release a 14S (50.4V) 4P and larger 14S 5P battery packs that will be similar to the Preditor battery with a lockable slider that connects to the water bottle mounts."
Not sure how that would work with my 30A controller and MAC 7T, or if it's just overkill.
Ok, to review what he has;
Motor Mac 7T- A fairly fast wind hub motor able to take quite a bit of power.
Controller-Appears to be an Infineon 10(?) FET in the 30 to 35 Amp range.
In a 26" wheel @ 48 Volts, given enough Amps, it should top out in the high 20's MPH. I say "enough Amps" because the Ebike CA sim. appears to show the system, due to the fast speed motor, becomes Current limited w/ a 20 to 25 A controller over 25 MPH.
So the question as to "which battery" becomes one of "how fast do you want to go"?
If a "standard" battery of say, 22 Amps continous discharge rate is installed, the Current will have to be limited via his Cycle Analyst, so the battery will not be over-taxed.
If one of Em3ev's "custom" batteries is installed, it likely will be able to supply the System requirements w/out any limitation.
As we all know, more speed = more money, so we are back at "How fast do you want to go"?
We are not familular w/ his bike at all, but I suspect, 25 MPH would be plenty fast.
Also, Olemetry has expressed some trepidation over all the wires and connectors he is facing. I would say, "not to worry". Enough folks here have used this combo, whether the CA is "direct plugin" or not, to be able to help. I would suggest he start his study at the Grin site, where there is plenty of info. on using Infineons w/ the various versions of the Cycle Analyst.