In order to have the best value and benefit for the system we'd constantly advise sourcing numerous quotes from capable installers. Even though we don’t precisely keep track of 20kW systems, we do keep track of 10kW & 30kW pricing – historic pricing traits for 30kW systems may be witnessed https://sitesrow.com/story7899310/the-definitive-guide-to-commercial-100kw-solar-system-installation-western-australia