You can use solar panels for your domestic electricity or hot water system by simply learning how to build solar panel systems. Whatever it is, you can save your money in both cases by decreasing your dependency on fossil fuel and by using it to generate power. Every person is responsible for his or her environment. We have to make this world a suitable place for our children. It is our main responsibility. So, if we start to use solar panels by learning how to build solar panel systems, it will make our environment pollution free and will also save our money.