It can be RPM's most profitable near-term market. These clean, sustainable technologies will afford profound environmental benefits. It can store energy for years, without significant self-discharge. Its permanent-magnet rotor is integral with a magnetic bearing rotor and flywheel rim, that spin together in a vacuum enclosure, without mechanical contact to stationary parts. Concentric cylinder carbon fiber composite flywheel rim, for low weight, safe, and lower cost bearings.
Parallel systems can accommodate more diverse applications and greatly enhance reliability.
Unlimited life with no maintenance facilitate housing it in an underground site that can absorb a possible nearly adiabatic explosive burst. This is a zero-maintenance design, that makes safe underground installation practical. It uses a standard reinforced concrete slab floor, and flush bolt-down steel cover enclosing the flywheel site, that protect building occupants from possible blast and explosion fragments. Block diagram of electrical system of a building, with RPM flywheel battery and multiple power sources. It can have adequate power generation and storage capability, plus discretionary loads, so that it does not require utilities to buy excess power generated on-site.