Marrero says that stable electricity costs will give the brewery a competitive advantage and help ensure profitability. The new microgrid, with its large solar+storage and generator investment, is also a hedge against future utility price increases. The brewery is connected to the main electric grid in the event of the need for backup power, or during poor solar production days however, it is also capable of “islanding,” or shutting itself off from the grid indefinitely. In an effort to meet its ambitious environmental goals, Maui Brewing Company has commissioned a hybrid renewable system that makes it “grid independent,” meaning that the system can operate without any grid electricity for the vast majority of the time, and it will not feed power back to the main utility grid. He installed a solar lighting system in the parking lot himself and says that the company’s renewable energy goals are just “right for the environment.” But they are also part of a strategy to reduce the high cost of electricity - particularly demand charges - that were often topping $50,000 per month. Garrett Marrero, who co-founded the brewery with his wife Melanie Oxley in 2005, has always been an advocate for energy efficiency and renewable energy. Maui Brewing Company, Hawaii’s largest craft brewery, produces over 55,000 barrels of beer each year.

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