Hi.
I've been having some issues with my leisure battery in the van lately .It's been losing charge quicker than usual.I run 3 pumps ( 2 trolleys and 1 for the filtration system) and 2 electric reels . the battery has a split relay charge .My van battery was also on it's way out as on colder mornings they're was a beep from the alarm when starting .
I've changed the van battery today and noticed the pump for the filtration system in the van running more vigorous and also the tank filled quicker . Si I'm guessing by the looks of it that they run together rather than van battery for the van and leisure battery for the system .
Is this right or not as I'm confused ?I'll give it a few more days to see how the leisure battery runs during the day as I've got a new one lined up.
All I can say is poor leisure battery.
A split charge relay is also called a battery isolator. Its a switch that 'joins' or connects the batteries together when the engine is running and disconnects them when you switch the engine off.
If the pump runs better with the new starter battery then an educated guess would be that the pump is drawing current from the starter battery. But the only way to find out is to follow the power cables back to source and see where they connect to.
Anything on the starter battery side of the SCR will draw its current from the starter battery. Everything connected after the SCR (before the leisure battery) will drawn current from the leisure battery.
If the pump runs better when the engine is running, the pump is being supplied additional power/voltage by the alternator.