New York Times: Hacienda Townhomes apartment complex sits in a struggling section of this city’s downtown, steps from an intersection previously known as "Crack Alley." The building’s beige, boxy walls house some of the region’s poorest residents. Locked gates and thick bars separate tenants from a homeless shelter, liquor store and tattoo parlor. But on the rooftop, 96 solar panels glint in the afternoon sun. Solar power arrived at Hacienda Townhomes this summer, changing this building’s …