Back Forty

EPRI Journal looks back 40 years at the electricity sector and research

An Early Look at Integrating Residential Solar into the Grid

In July 1977, EPRI Journal reported that construction had begun in Long Island and Albuquerque on 10 experimental houses with solar heating and cooling systems. The project—a collaboration between EPRI, builders, and local utilities—was the first ever to examine grid impacts of residential solar systems along with customer benefits. With both traditional and contemporary architectural designs, the houses would sell in the $60,000-$75,000 range and be occupied by families in 1978. The project manager noted that the findings would inform utilities as they structure equitable rates for their solar and non-solar customers.