Cheap financing from development banks and multilateral institutions such as the World Bank must be directed toward energy storage to prevent some emerging renewable energy markets from going back to polluting technologies, according to a new study.

The report, which focused on Chile, Mexico, Thailand, Kazakhstan and Morocco, noted that investment made in wind, PV, concentrated solar power and geothermal power had helped speed these technologies to market maturity in each country, ushering in private and commercial finance.