Energy and electric power private equity manager Energy Investors Funds (EIF) has closed its largest fund to date, EIF United States Power Fund IV, with more than $1.7 billion of committed capital.

The fund received commitments from a wide variety of domestic and international limited partners, including public and corporate pension plans, insurance companies, endowments, family offices, and foundations. EIF’s previous fund, United States Power Fund III, closed in 2007 on $1.35 billion.

The fund will focus on investments in U.S. power and energy generation and transmission assets with long-term off-take contracts and selective new development of new natural gas, coal and renewable energy facilities.

The firm already has invested approximately $3