Leisure battery not charging, and habitation electrics as not cutting out with engine on?

[banksey88]

Hi,

Seem to have an intermittent problem with my leisure battery not charging when the and also my habitation electrics don’t always cut out also with the engine on.

I have a Sterling Power BB1230 B2B charger and a Sargent EC155 setup. I’ve done some testing on the Sterling unit and get 0V output with the engine running, although sometimes it does kick in on startup and I’m getting 14V~.

Additional to this issue, when the battery doesn’t charge, usually the habitation electrics in the back don’t cut out either and everything turns on as if the engine was off. Again this is intermittent and sometimes works.

Im thinking the 2 issues are linked?

If anyone has any ideas that would be great.

 

[kipperman]

Sounds like a Bilbo's conversion using this combination.

Likely linked issue - and I would look at the ignition feed to the EC155 set up - this is how it "knows" the engine is on or off - instructions say this is fuse 3 and 5A. Check out fuse, and if OK - see if you can get 12V on one of the fuse terminals with the ignition on. If not, then suspicion has to fall on that ignition feed, and that could also be linked to it not charging with the engine running ( see next paragraph)

Quick read of the BB1230 shows that there is also an optional ignition feed to connection 4, so check whether this is present and whether there is voltage present when the ignition is on. ( so roughly 12V with ignition on). There is a mention also that the unit can take up to 60s to start charging after sensing ignition on.

Intermittent problems - could well be corrosion somewhere or at it simplest a loose/knocked fuse.

A lot of the time converters use a piggy back connector in the vehicle fuse box (NOT the ec155) to provide the ignition feed, so another first port of call.

HTH - report findings if no success. Picture of vehicle fuse box would be helpful as well.