From Page 31 of their Battery Technology and Analyst Day Presentation

Increased capacity allows us to consider alternate revenue streams such as growing our rental fleet, E-Buses and Trucks, and EaaS offerings (where we are engaging in a feasibility study with Jupiter Power)

What is efficiency as a service business model (EaaS)?

EaaS offers a pay-per-use model where customers only pay for the service they receive, rather than the physical product, therefore avoiding the upfront costs of expensive modern efficient systems.

Blackrock owns Jupiter Power

https://www.energy-storage.news/blackrock-buys-us-battery-storage-developer-jupiter-power/#:~:text=Asset%20manager%20BlackRock%20has%20acquired,Jupiter%20Power%20from%20EnCap%20Investments.