Disconnected the vehicle battery from the system by just removing the main fuse.
Disconnected the live wires and earth from sterling unit.
Also the ignition live and battery sensor. So the unit is completely isolated.
Then connected the solar panel wires to the solar unit along with the liesure battery live n earth.
So now the main battery and liesure battery work independently.
If this works out that the main battery is holding/ getting full and a better charge, then I guess the sterling unit is causing some issues!
I'm looking at using the good old 12v 140amp Durite 0-727-33 Voltage Sensitive Relay!
That way the liesure will get a charge whilst driving but in the simplest form.
More homework!!!
Can't use Durite relay with smart alternator/ regen braking! Well most say can't few can't see reason not to!
Me : a new alternator is loads of money! Not worth the risk.
Rethink but I'll wait till I've used the van a few times and it'll sit over weekend so test the voltage pre going to work on the Monday.
My solar panel is 160 amps I've another 100 amp ( rigid version) fridge is the only heavy user of 12v , but we've electric hookup for when we're static for a period.
LED lights, water pump n tap, heater if needed.
Main battery is holding slightly more power since it's been disconnected from liesure battery and sterling unit.
So made decision to remove the sterling unit altogether.
Again will monitor over weekend.
The main battery is not a stop start battery as I was told, basically stitched! But I'll see how things are over the next week. But will probably fit the correct battery ( well apparently this type of battery as to be "plumbed" into system!) Again not what I was told! So a trip to my new found VW specialist!
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