My sister owns a duplex. Her family lives in the larger, upstairs unit (73%) and she rents the downstairs unit (27%) to a couple. In 2024 she installed solar on her house. Both units are on one single meter and share electricity. The downstairs tenants have utilities built into their monthly rent check. How does she properly claim the solar tax credit for her home (which includes the rental unit downstairs (Sch E))?
