Phase Change Material (PCM) energy storage tech

A search for “PCM” in the community came up empty so I’m posting this because I know classifying some of you as “Early Adopters” isn’t derogatory … and I’d like some beta-tester reports!

Anybody using a U.S.-based PCM tech?

As an urban dweller in a very complicated space and energy environment, any tech that speaks “integration” and “densification” along with increased efficiency is worth investigating.