TXU Energy , a large Texas utility company, will lease rooftop solar power systems to their customers in the Dallas area. Homeowners can sign up for the program with TXU and their partner in the project, SolarCity , will design and install the systems. After tax incentives, an owner of a three-to-four bedroom house would owe about $35 a month for a lease, though for $26,000 they could buy the array outright. When leased, SolarCity continues to own the array and performs any maintenance. Currently, the state utility infrastructure company Oncor has funds to offer rebates on about 400 home installations, but SolarCity expects the program to grow quickly over the next five years