Green DIY Energy can be defined as energy that is created using the earth's most common energy sources and converting them to electricity. In most cases, the sources of energy present on the earth are the best to be used in our lives. You can build your own DIY solar water warmer even if you are a novice. You can easily follow all the simple instructions narrated in this guide for building solar water warmer. This is a fantastic trick for saving your electricity bill up to a significant amount.