Does solar really reduce carbon dioxide emissions? 

If you were to install a 5kw grid connected solar system on your property you may expect to prevent 8.25 tons of carbon dioxide discharge annually. To put this into a tangible amount a standard vehicle will travel around 20000 km annually and this would discharge approximately 3.3 tons of carbon dioxide discharge. As a generalisation, each 5kw solar system that is installed in Australia will counteract the equivalent usage of 2.5 cars per year.