Hello I'm new here.   Living in lovely Torbay and we have a VW Topaz bought new 6 years ago. I have never found out how to properly use the ZIG type unit switch gear.

It's not a zig but has no makers marking.  Fitted by Auto-sleepers when they built the conversion.  Nothing in the manuals shows anything about this switch gear Control Unit. It sits above the door to the shower-room.  I can easily follow the Master/WaterPump/Interior Lights switches but the Battery/Vehicle one has me foxed.

The switches are laid out as follows:  First one is a 2-way either up or down rocker switch.  Other 3 are just on/off rockers.

Habitation
 Vehicle     Master   Pump   Lights

In the middle is an analogue needle showing levels of battery charge or levels of water in the main fresh water tank depending on which way you press the horizontal mounted switch above the read-out that says Battery <-> Water.

My only confusion is over the use of the first switch Habitation and Vehicle. Switching it to Habitation and then checking levels is fairly straight forward but what about when the vehicle is hooked up to a mains input through the Hook-Up socket on the outside (right hand side of the van)? Does this first rocker switch change the mains power from charging the Vehicle battery or the Leisure battery?

Or does it mean that when the leisure battery gets low on charge, then switching to Vehicle will then run all the interior lighting and water pump Habitation items using the Vehicle's main Battery instead of the Leisure battery?

Maybe it does both, but certainly when selecting Vehicle and then pressing BATTERY rocker it shows the same level of charge for Vehicle battery as it does for Habitation (Leisure) battery when I know that the Vehicle has more charge in the battery under the bonnet than is currently in the Leisure battery under the bunk.   All very confusing.

Any gurus out there who know just how this thing is configured.  I'd be over the moon if you could tell me.

Thanks in advance

Toppyone