Indy posted:

The URL supplier for the Arrid is www.12volt.com.au. My solar system is 2 x Solarex 48W. The solar regulator is my own constructed version 2 stage regulator (full charge and trickle charge) ( I am an electronics tech by trade). The battery is an American brand, that I cannot remember off hand, deep cycle lead acid rebadged and supplied through Comet batteries in Brisbane. The capacity is 105AH. The present method of charging the caravan battery is through an isolation diode off the main vehicle system. With diode and cable voltage drops the caravan battery cannot reach full charge.

Oziexplorer posted:

Interesting, as if you try the URL www.arrid.com.au it takes you to a Solarex website.

Interesting device that. Not sure it is really applicable to motor vehicle and your problems.

I have 2 x BP SX60 panels, and even in winter have not run out of power. What are you using that takes so much power? I thought with my hot water system, fridge, NiMH battery charger, TV and video, car radio/CD player, charging iPaq there would be few who used as much power. In winter I do have to change my panels towards the sun, and move them three times a day to ensure sufficient charge, but to date have only had to run my generator once when the sun did not come out for ten days.

Why not just add another panel? They are cheap enough now. The BP SX 60 are just a few dollars over five hundred.

What is the distance from your existing battery and alternator to your backup battery?