The Residential Clean Energy Credit gives you 30% back (as a tax credit) on the cost of installing solar panels, solar water heaters, battery storage, wind turbines, fuel cells, or geothermal heat pumps at your home. Unlike some credits, there's no dollar cap on this one. It applies through 2032 at the full 30% rate. Any unused credit can carry forward to future tax years. Both primary and secondary homes qualify, but not rentals.