240v hook-up and charge controller

[ghost123uk]

The relay just clicks on and off constantly. Even when I am driving, all you can hear is the relay clicking away.

Umm, this is likely either a faulty relay, or perhaps the wire from the starter battery to the relay (or the earth wire) has either a bad connection, or is too thin. We know the reason why the thing is constantly switching on and off, you just need to find the cause.

[Budgie7]

Hi again, checked the voltage in both batteries again yesterday morning and something strange happened, couldn't always get a reading off the leisure battery. Sometimes I could sometimes I couldn't..checked the connections on the battery and the earth, same again, intermittent .
Anyway had a spare battery which I swapped for the leisure battery and the relay switched itself on and off a few times then started charging as it should. Was it a faulty battery ? Maybe , anyway fingers crossed.