From Kaiser’s standpoint, there are multiple benefits to a renewable microgrid such as the one in Richmond.
For starters, the 250-kilowatt solar PV installation on the top of the facility’s parking garage helps reduce the hospital’s utility electricity usage by at least 365,000 kilowatt-hours annually, according to the project specifications (PDF). A one-megawatt battery serves two purposes: Not only is it designed to provide a three-hour backup window, it is also paired with intelligent controllers and software that enable the facility to take advantage of demand response programs. At the time it was specified, the project was expected to save up to $141,000 annually. (Part of that amount accounts for the cost of buying fuel for diesel generators.) Baruch didn’t discuss the actual financials of the project.
Currently, electricity accounts for between one-third and two-thirds of Kaiser’s total carbon footprint, depending on the loads being supported during a given time period, he said. Kaiser’s ability to manage that consumption more closely on a site-by-site basis is imperative.”
FULL STORY published July 5, 2018 via GreenBiz.com