Can I add a second solar system and still claim the rebate? Finn Peacock October 21, 2017 13:48 Updated Follow Yes! Upgrades are eligible for the solar 'rebate'. i.e. your upgrade cost will be discounted by the value of the 'rebate'. (Don't get the solar 'rebate' confused with the Feed In Tariff. They are totally different things) Related articles What will happen if I upgrade my current solar system? I really want to add a Tesla Powerwall to my solar system. Is it compatible with my existing solar system and inverter? I've been told my maximum solar system size is 5kW. Is that correct? I have an existing 3kW solar system. I would like to install a battery so i can keep my electricity. Where do I start? What panel brands do you trust? Comments 0 comments Please sign in to leave a comment.