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Solar Speaks special edition: CPS America explains what you need to know about Rule 21
b"A new set of interconnection requirements are effect in California as of September 9, 2017. Known as Rule 21, the set of requirements will allow inverters to provide additional functions to help support the grid. Casey Miller, VP of Business Development at CPS America, explained how it works and why you should pay attention even if you're not installing in California."