Techinical info on Jacyo Westport ltd 2001 Caravan

Jayco vans of that age did not come with batteries. The lighting in the vans was 12 V as standard and the power was supplied from either the tug via pin 2 in the trailer plug or a 240 V PSU (power supply Unit) when connected to mains power. The PSU supplied in the van would have been either a Centurion or Setec ST-I (The Centurion is similar to the Setec but I can not supply a link to it.) Both of those PSUs have a connection for a battery which some owners add after taking delivery of the van. Those PSUs have the capability of supplying a trickle charge to the battery whilst you are on mains power. However, the battery charging is not very effective.

If your van has a battery in it then as I said above it would have been added after delivery. If a previous owner knew something about battery charging then He may have installed a proper battery charger in it. If the electrics now in the van were anything other than I described above then it is anyone's guess what previous owners did to the van.

Way back when your van was manufactured most campers used the tugs battery for van power when off mains power. Our power requirements were vary low then, we just used lights, some vans may have had a car radio in them and very few attempted to watch TV. If there is no battery in your van you need to add one. If you expect to recharge a battery with an overnight stop in a caravan you will also need to install a multi-stage battery charger in order to recharge the battery in that time. A 100 to 120 Ah deep cycle battery and a 20 - 25 A battery would suffice. If you wish to stay free camping for extended periods without visiting a caravan park then you will also need some solar panels and a solar controller.

Thanks for info, it is as you have described.It also has a a switch, 12v to the battery , but doesnt seem to do much.
A bit more searching i think is now required, as it is sort of set up for free camping with hot water etc.
Thanks again for your info.
David.

I recall looking at a Jayco Heritage of similar vintage, looked great, what I remember is that the Tare was around 2300Kg and adding another 400 or 500Kg of payload was to heavy for my vehicle at the time, suggest you check this along with your vehicle towing capacity/towball load.
Peter