As battery prices continue to fall and the penetration of variable wind and solar generation rises, power plant developers are increasingly combining wind and solar projects with on-site batteries, creating âhybridâ power plants. New research from Lawrence Berkeley National Laboratory and the Electric Power Research Institute in the US shows that interest in hybrid plants is high, and that hybridisation can offer benefits relative to stand-alone plants. There are also limitations to hybridisation, however, and market rules and policy incentives can make or break the finances of a project. Â