I just use a 12V battery. I have it in a battery box with the flashy disco lights that tell me if i have to recharge it...haha. I store it in my shed when not camping and when I go to the shed I press the button and if it glows and says I need to recharge I recharge it for a day and so forth.
When in the bush I run a light i constructed from a 240V lead light that have 5M cord on them. All ya do is cut the plug off, add the positive , negative alli's and buy a 11W 12V bulb from a light shop and it works well. Also run my CD/Radio player and my 12V Trucky fan in my CT. Ya never run it all together as ya normally only have two on at once. I gone 4 days using the battery with no dramas.
Anyway just the way I do it fellow campers
I AM LIKE A HOLE IN THE GROUND WITH WATER IN IT - I AM WELL