Hi my controller just packed up,whils it was being repaired,I connected the pump straight to battery,it worked ok,but the downside pump is running flat out when you call for water,resulting in using a lot of water,also when you stop water flow the pump is going from flat out to a sudden stop,don't think this is good for pump but got me out of trouble.
There a guys on here that work without a controller but don't know if they do the same as I did or if they have another way of regulating water flow