I have powered TVs, lights and computers on modified square waves without problems. There are some devices that really want to have clean sine waves. Sine wave inverters are available but cost a lot more. Where to Buy Supplies Wiring, junction boxes and switch panels can all be purchased at local hardware stores. For fat gauge cabling, you might have to find an electrician's supply store or a major city hardware store with a well stocked electrical department.
Solar panels are available both new and used.
The best place to look for panels is in Home Power Magazine. See the Resources section on our Table of Contents page for more locations. You can read a wide collection of articles about renewable energy topics in Home Power Magazine or visit their web site. Topics on renewable energy and sustainable living are also available. All Rights Reserved.