Hi, I have fitted the Porter 10 and Magura pot throttle I purchased from 4qd, to my Sinclair C5 (original 250watt motor).
The Magura's three wires are connected directly into the brown connector of the Porter 10 (in B,C,D as instructed) - I did not fit the optional 1KE resistors. Blue, yellow, red and black power cables purchased from 4qd are also fitted as instructed.
I have a LifePo4 30ah 24v battery which I purchased separately with a BMS fitted on it. On the live wire from the battery there is a blade fuse holder, with a 30amp fuse in it. I've endeavoured to ensure 6mm2 cable throughout the wiring as well.
On driving the C5, everything works fine for about 10-15 seconds, with full range of throttle control from the Magura, but then the 30amp blade fuse blows - clearly shows melted apart in the middle.
Can you advise me - should I just have a higher amp of fuse attached, for example, or would you recommend I don't need a fuse on the live connection? Alternatively, is there something else I have missed? The 4qd instructions looked pretty simple. I don't have many specs for the battery, as I bought it used rather than new.
Forgot to add, I tested the whole setup with the C5 jacked on bricks and no load (i.e. no-one in it) - it ran fine, for an extended period.