| http://www.w3.org/ns/prov#value | - If battery UPS is used, this has a limited run time ??? maybe 20 ??? 30 minutes, after which time, everything is down unless a generator is installed, so why not put in the flywheel and diesel gen set in the first place, since this will give unlimited UPS.This article is written by and features Active Power who manufacture these systems.As compared to other energy storage technologies (i.e., flow
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