Univolt/Dual Batteries

[uwe]

Does anyone know if the Univolt would support dual Batteries simply wired in parallel? Or must one use an isolator or switch in order to use 2 batteries?
Our battery lasts through about 2 nights, with lights for reading etc. But then there is the water pump etc.......
Also, my tow vehicle does not currently have a 12V charge circuit at the trailer connector hooked up. Is this simply a heavy wire coming from the vehicle battery or does it need a dual battery device n the tow vehicle?
Any experiences shared with me would be appreciated!
Ciao,
Uwe

[FrankR]

The Univolt is a converter.. It is able to charge one or 10 batteries at the same time providing all the positive posts are connected together and all the negative posts are connected. The more batteries connected the longer the charge time. The Univolt will only charge a battery if there is 120volts ac available. Converters come with many 12volt dc outputs. The output is from 20 thru 95 amps.
If possible to create a tow vehicle charge line, do it today. Wire the power on a seperate fuse of about 30 amps, thru a relay that is controlled by the ignition circuit and use #10 mtw stranded wire with soldered connections. Time and energy expended upon initial fabrication will pay great dividends later When the engine is at rest, the trailer can not draw any power from tow vehicle's battery. This is a good time for a dash volt meter....

[uwe]

I happen to have rear A/C and Heat in my tow vehicle, which means there are already wiring provisions to which I can attach the wire from the battery. I will do this before our next trip and after I figure out the A&E awning problem.
Thank you for the advice.
Uwe

[FrankR]

There is no relationship between rear ac and heat with a charging circuit for trailer batteries.... The charge line should be for very specific purpose...

[uwe]

I meant that here are already wiring channels going from the engine compartment to the very rear of the van, which can be used to include the charging cable for the trailer.
Uwe