Can I add a second solar system and still claim the rebate? Finn Peacock July 19, 2018 01:57 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 to my premium feed in tarrif if I upgrade my current solar system? We've got a 6kw solar system, installed 5 years ago, no problems with it. Howver, its been installed facing North, which is great. Can i just add more panels and another inverter or do i need permission from anyone? I really want to add a Tesla Powerwall to my solar system. Is it compatible with my existing solar system and inverter? I want to upgrade my solar system in WA. What do I need to do to keep my Feed In Tariff (REBS)? How does SolarQuotes make money? Comments 0 comments Please sign in to leave a comment.