An automatic transfer switch to redirect solar generation, like that from wineries, may be a blessing or a curse, according to Collicutt Energy, a company that sells the switches. In order for a distributed generation owner to disconnect from the grid in an emergency and provide its own electricity, a three-way switch that costs $6,000-$7,000, plus installation, is required. Still, a solar installation would only feed the property when the sun\u2019s out. \u201cIt\u2019s better than nothing, but in the real world a backup diesel generator is the way to go,\u201d Nick Padilla, Collicutt representative, said. A switch will monitor the utility distribution system. When it goes down, it closes off the utility feed, and sends the generated power back to the producer. In a case of \u201cbe careful what you wish for,\u201d the load at the, say winery, has to match the output of the solar array. Otherwise, the system would crash anyway, noted Padilla.