At the end of the day, the most important issue is who will stand powering the quality of your installation. Though we don’t specially monitor 20kW systems, we do keep track of 10kW & 30kW pricing – historic pricing developments for 30kW systems could be observed inside the graphs under: https://ilovebookmark.com/story18027026/5-tips-about-solar-battery-installation-wa-you-can-use-today