Energy storage races to investment-grade status


In early 2017, SUSI Partners launched what it called the “world’s first dedicated energy storage infrastructure fund”, and by the end of May 2018 the group had raised €252 million ($283 million) from institutional investors in Germany, the Netherlands, Austria, Sweden and Switzerland. The fund seeks returns of 8-10% in 10 years when accounting for degradation, with a minimum project size of 10 MWh. Overall, 75% of the projects the fund acquires must come with long-term capacity agreements.

As the latest, the dedicated Energy Storage Fund has acquired a 50% stake in a portfolio of behind-the-meter battery storage systems from Macquarie’s Green Investment Group. The lithium-ion projects are located in the Western LA basin in California and have a total capacity of 63MW/340MWh across 90 projects. All projects are “substantially contracted for 10 years” and are spread across multiple high-load commercial and industrial host sites.

The portfolio includes what is described as the world’s largest virtual power plant (VPP) using battery storage to control and reduce peak demand at large commercial and industrial customer facilities. The 11 MW / 60 MWh VPP became operational in 2018, and delivered more than 2 GWh of capacity services, saving more than $1 million for the customers. No pricing on the investment was given.

At the time of the fund hitting €252 million in May 2018, SUSI noted it had already completed two investments, allocating approximately €90 million (US$101 million) of the fund. One of these was for lithium-ion systems, the other flywheels, and both projects had long-term visible cash flows.

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Preceding this, in November 2017 SUSI signed a $120 million ($90 million) facility with NRStor C&I to develop a 300 MW portfolio of behind the meter energy storage projects.

And in January of this year, the energy storage fund signed a €100 million ($112 million) deal with ABB for development and execution of small-scale microgrid and power grid connected energy storage projects through qualified engineering, procurement and construction (EPC) partners.

Macquarie has been very busy in recent weeks, having received financing to build 97 MWh of the portfolio last week from a consortium of banks. As well, they bought a portfolio of 6 GW of solar + storage projects from Enel.

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