New Technology That Reduces Residential Rooftop Solar Costs

RMA for residential rooftop solar

Last month, San Diego Gas & Electric (SDG&E) began installations of a new technology that significantly reduces the cost for many customers installing residential . Developed by SDG&E, the Renewable Meter Adapters (RMAs) connect systems directly to the existing electric meter panel in as little as an hour. The RMA technology allows customers to avoid the need for invasive and time consuming panel upgrades that typically cost over $2,500 not including the structural impacts to walls, stucco and landscaping, especially for older homes.

“SDG&E is proud to have interconnected more than 62,000 customer rooftop solar systems, representing more than 415 megawatts of electricity,” said Caroline Winn, Chief Energy Delivery Officer for SDG&E. “RMA technology is another example of our commitment to enable our customers’ choice of technology on the SDG&E grid. RMAs will help to put solar within the reach of more of our customers in a way that is efficient, safe, and reliable.”

RMAs are among several SDG&E initiatives to support California’s environmental goals and the growth of rooftop solar. In 2013, SDG&E developed an online application that reduces solar interconnection times to an average of four to five calendar days, to our knowledge that is the fastest approval time in California. A growing number of customers are also taking advantage of SDG&E’s “fast track” option that allows same-day connection.

RMAs will further speed up the solar interconnection process for SDG&E customers. The RMA costs approximately $1,300. Customers and solar installers can order RMAs by visiting or emailing


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This post was prepared by Solar Thermal Magazine staff.


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