Earlier this year, Caterpillar Inc. announced the introduction of Cat® Compact ESS, a new mobile battery energy storage system that supplements traditional mobile power solutions to reduce noise and enable deployment of renewable energy sources. Additionally, customers using efficiency gains to minimize fuel usage can reduce fuel costs, associated maintenance requirements and greenhouse gas (GHG) emissions when compared to continuous generator set usage. 

Based on expected power needs, the Cat Compact ESS modules are ideal for equipment charging stations, offices, auxiliary buildings and security systems at construction, mining, oilfield, and pipeline worksites; remote agriculture operations such as irrigation; outdoor concerts, golf tournaments and other special events; and emergency response and other temporary power applications. 

https://www.cat.com/en_US/products/new/power-systems/electric-power/microgrid.html