having terrible trouble with my leisure batterys draining rapidly as soon as pump is on.
i know the batterys are call right as tried em in mates van today and stuck at 12.6 for ages.
As soon as i switch my pump on in my van it drops to 11.5 .
Any ideas guys?
If the battery is ok, then there is an issue with your setup after the battery. If it used to work fine but isn't now, what has changed that could have caused the problem? Are you using the correct size of cable and are all connections good and tight. We found that the worst place for a poor connection is at the inline fuse holder. If you are using crocodile clamps at the battery, change them to proper battery clamps.
As has been pointed out by another poster, your battery fully charged will read around 12.8v. With the engine running it will be anything from 13.8v to 14.4v. If you don't get that voltage, then there is something wrong with the Split Charge Relay setup. There should be an inline fuse holder very near to the van battery. Check that first of all. If your setup is wired to earth using the van body then make sure the connection to the body is good.
We use a seperate SCR and we need an earth cable from the Leisure battery to the van's body to work.
The spring controllers are designed to shut the controller down when the voltage drops too low to protect the battery from being wrecked.