I thought I would share this with other people. I have a basic set up in the trailer, a battery which runs some lights and has five cigarette lighter sockets for powering things. I keep the battery charged up by solar panels. It is enought for the Engel, some lights and powering up stuff. I did find though that I needed to ensure the battery was above 12v, otherwise things didnt work.
I used to check the voltage via a Multimeter, cheap one from Bunnings ($12) but after a year it got fried. I met a guy on the travels who had this gizmo that he plugged into his cig lighter and it would display the voltage, $25 from battery world apparantly.
Tried nearly every battery world, I went past none of them had one. Was checking out EBay and some guy had one in China (new) delivered for $4.95...I thought cant be possible, must be crap or a rip off.
Well it wasnt, it was shipped minutes after I paid for it and arrived within a week. It actually beat an order that I made in Australia on the same day (I am still waiting for it actually, three days later). How the hell, some guy in China, can make this thing and post for $4.95 is absolutly amazing, no wonder they make everyting.
Sorry might be boring but I got pretty excited about it.