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how to create a cheap solar panel(100watt)?

I want to build a solar powered robot for technical competition

<a href="http://www.lindsaybks.com">www.lindsaybks.com</a> sells a maual on how to create solar cells from sheet copper quite cheaply ( book AND solar cell )
Re-design7 years ago
Search the internet for the cheapest 100 watt solar panel. Or search for surplus solar cells and make you own panel. I doubt that this is going to be cheaper. Plus you will have to calculate what you power is and on a production panel the numbers are already figured for you.