This depends on your roof space and the size of the inverter. If you have sufficient roof space and additional capacity in the inverter you could increase the size of your system. Or you could add a second system to your roof. Please note: At this time, the solar Feed-in Tariffs in each state have limits on the system size. Increasing the size of an existing solar power system could affect your eligibility for a Feed-in Tariff. Please call us on 13 76 52 for further information.