Ok so going green is something that I have wanted to do for a long time, but due to cost restraints, or not owning a property, it has made things difficult. I plan to install a household solar system hopefully next year. Yeah I know it costs a lot, but I have a fairly well paying job, and by looking at it as an investment in the future, and environment, it makes the choice so much easier. At this stage I am unsure If I should go grid/offgrid. If going grid, I want to make sure I generate more than I use as I am not interested in paying power bills. So I am coming to the electronics gurus of OCAU to help me take a bite into the solar world. I have done some tests with a power meter I bought from Jaycar. I found the following results when measuring computing devices. I have a desktop PC with 4 screens, speakers, etc, It pulls about 200 watts on average. I just bought a new Toshiba T130 ultra low voltage laptop which pulls only 25 watts when charging, and 15 watts when it if fully charged! That's a huge difference! My ADSL modem pulls 7 watts. So I was going to sell the desktop machine, and use that to fund my green solution. This is a small project to get me familiar with how solar works, and the technologies involved. I was wondering if someone can help me calculate what size panel and battery/batteries I would need to sustain my new laptop and modem. Again I understand this is not a conclusive solution to my overall solar needs, but I am hoping to merge this system with the big system I plan to install down the track.