contoller cutting out

Hi there, I've recently finished building my 13s 3p battery with Samsung 25r 18650 batteries, which has left me with a voltage of around 45v when charged, When first built I managed to ride 200m down the road, before it all suddenly went black... I returned home and put the battery on...

Just thought I would start a new thread were the Yosepower kits are concerned and the generalised field of customising any ebike ekit is concerned... My current project has hit a wall - Customising a Yose 350w rear kit (36v 26" 15amp) for the sake of future proofing and to allow a 48v battery...