I had a problem with no power.Turned out to be a lose wire that had worked free. This was inside the controler. You would have never seen it. I was just fiddling with all the wires and zoom away it went. The clip connector had opened up slightly causing the problem.
I don't under stand this bit> if i connect with power off the light does not come on.Because if the power is Off the light cant come on Have you got a multimeter ? If so try using it on the Eco Flow ,to see if it sends a reading when turned on and off. It should show what the power is doing. RegardsWightsurf *****
Have you got a multi meter to see what it's up to ?
if the pump works ok when directly connected to battery and the light comes on the eco flow when pump is disconnected, sounds like the eco flow is faulty(have you got it wet?) or a wire is shorting out somewhere, maybe worn and touching metal between battery and eco flow