You don't need to anything fancy as a I have already mentioned.
Speed sensor has 3 wires Gnd/Black, 5v/ Red & signal/other colour. Connect the signal to the white hall connector wire & the other two pick up from any Gnd or 5v as they use a comon track on the board.
48v with 17 or 20a controller. 250,350 or 500w not alot in them, it's all dependant on the controller amp rating and the the voltage. Obviously the 500w is the one if you want to the throw 25/30a in to it then the flip side is you need a battery that can sustain the output which adds cost...
I use a Meanwell from HLG range heavy good quality with some current & voltage adjustment, select one that suits your needs. It depends on the charge current you require, HLG for about 2.28a or CLG if greater charge current needed.That said I use China ones Sans and the like with no issues...
I am close to LGW and it is lovely and quiet, for those out in areas like Newdigate,Capel etc it is bliss as they are right under the flight path.
Whether they can locate or apprehend the morons is another thing.
Nor me...
You may need to test the speed sensor theory for it to work.
That's why mostly we suggest the more expensive but proven KT range as they do work.
It's not a usual controller set up many use, d8veh did try one a similar one with 16p settings I think it was a brainpower one and had issues setting it up. How about a link to your controller ?
A few thoughts;
What do the the P settings represent without an agenda there is no way of knowing...
Going down hill won't matter gravity takes over so you will easily hit over 30mph, depending on the hub kit 20/22mph is possibly @36v or a bit more @48v.
A good outcome Bilabonic, problem with fault finding is it can be time consuming and frustrating.
With unusual voltage readings I have a set order of faulting.
1. Check charger output with a meter if reading strange I try another meter or new battery source.
2. Charge fuse if fitted.
3. Next...
I used a fine brush with isopropanol to clean the track up first.
Found the grease I used it was waterproof high temp electrical grease ACF 50 in a tube a blue dielectric grease, I originally got it to use on copper bus's when playing with Fruzend kit.
I had some dielectric grease (green) and just applied a small amount in the pinned end any excess should squidge out, the pins are copper and I had a green moisture track from one to another causing my issue.
Got the colour wrong blue grease.
I can't remember but yes think 17a might be the limit, strangely with the original controller I was always able to go faster then with the 17/20a kt one.
I'm currently re- celling one of my DAS cases with Panasonic 10a cells as 10s 4p, the config/layout allows for a better more even current...
Although both KT, Kunteng offer OEM customisation to the customer so software/programming is likeli to be different.
Buy the PSWP ones and you again have different programming and have a speed wire for being naughty.
With julets I poke a bit of grease in them now as I has an issue on my...
You shouldn't, but Hmmm we do. It's human nature to push the boundaries.
Increase in controller rating and battery voltage to 48v give you more torque for inclines and quicker acceleration to 25km/h.