'Illinois has $30 million in incentives available for solar installations on multi-family buildings.
There is little incentive for a landlord to invest in solar that will provide cost savings to the tenants, and rooftops may need significant upgrades to handle solar. In condo buildings, homeowners association bureaucracy and other concerns must be navigated.
There’s also a lesser-known logistical and structural barrier — if solar is to be channeled to individual residential units behind the meter, a separate solar system is essentially needed for each unit — with separate inverters and wiring.
Allume Energy is an Australian startup company that says it can address at least this part of the puzzle, by sending energy to individual units with only one inverter and system.'