This is how I built my solar powered generator for only $300.00. I provide step by step instructions on how to do it yourself. Please leave a comment let me know what you think.
Just to answer some questions
1. I got most of my components on Amazon.com the others I got at auto parts stores and home improvement stores
2. For safety yes you should put venting holes in and yes connect the terminals to the inverter first prior to hooking them to battery.
3. To get more power get a bigger battery, charge controller, and a panel.
4. you can use this same setup as a wind powered generator using a dc motor and prop instead of a solar panel.