A winter site visit to a solar installation developed by Plankton Energy and financed by RSF. Photo by co-lender Gratitude Railroad.

Financing flows to three changemakers

 For the first time, investors can access RSF’s deep-impact private debt offering on a widely used platform


San Francisco, CA (August 25, 2025)—Impact leader RSF has issued three new loans to climate and energy borrowers and widened electronic access to its Social Investment Fund (SIF), targeted at investors looking to advance social and environmental innovators.

A solar installation developed by new RSF borrower Solaris Energy. Photo by Solaris Energy.

New loans fund affordable, renewable energy in communities across the U.S.

RSF recently issued $4.2 million in loans to three companies focused on increasing access to clean energy. RSF provided a $1 million loan to BlocPower, which creates micro‐portfolios, or “blocs,” of shovel‐ready clean energy projects that generate savings for small businesses, nonprofits and multifamily homes in underserved communities. RSF’s loan will fund a portfolio of energy efficiency upgrades to single-family and multifamily homes. At an average project size of $15,000, the capital is expected to finance roughly 60 energy efficiency projects.

Solaris netted a $2 million loan from RSF to fund eight solar projects in Colorado, Arizona, Virginia and Oklahoma. Solaris offers low-cost financing to solar developers in a drive to accelerate widespread deployment of distributed solar energy and battery storage systems.

“Solaris’s loan with RSF allowed us to refinance a portfolio of operating solar assets, in which we engaged 50 individual investors (many first-time investors) to be shareholders alongside us,” said Solaris CFO Jes Rawley. “Operating solar assets generate healthy, stable, investable returns, and we really leveraged that to raise the sponsor equity needed to purchase the portfolio.”

Plankton Energy, a developer of commercial and community solar energy systems, will use its $1.2 million loan from RSF to support three Massachusetts solar developments. Collectively, the projects will save an estimated $525 million in lifetime energy costs and reduce carbon emissions by 9 million tons. Two of the three projects provide community-based solar energy for low-income residents.

RSF has also moved to ease investment in the SIF, which is expected to enable more lending to social enterprises working in climate and energy, like those above, as well as in food and agriculture, education and community impact.

A solar installation developed by new RSF borrower Solaris Energy. Photo by Solaris Energy.

CUSIP-registered notes make it easier to support environmental and social impact  

RSF Social Investment Fund, Inc. has closed the first offering of its CUSIP-assigned Broker Notes. Gross proceeds from the initial closing totaled $5,420,000.  The Broker Notes have been listed on Bloomberg through exclusive bookrunner Performance Trust Capital Partners, LLC, a FINRA-registered broker-dealer. These three-year Broker Notes bear interest at a fixed rate of 3.5% per annum and require a $5,000 minimum investment in RSF’s Social Investment Fund.

For the first time, investors were able to access the 40-year-old, deep-impact Social Investment Fund through the purchase of Broker Notes in a streamlined, scalable format. The CUSIP number assignment removed manual onboarding hurdles that previously limited access for registered broker-dealers, investment advisors, institutions and asset managers. 

“This launch marks a transformative moment for RSF and is an encouraging uptake for a unique offering like ours,” said Jasper van Brakel, RSF president and CEO. “By bringing our Broker Notes to the electronic brokerage market, we’ve made it considerably easier for investors to align their capital with their impact goals.”

Learn more about the Broker Notes.

About RSF

RSF’s mission is to change finance and finance change. By offering investment notes, available for purchase via online brokerage accounts, donor-advised funds and loans, the San Francisco–based impact leader mobilizes money for positive impact. Since 1984, RSF has invested over $1 billion in healthier food systems, climate solutions, whole-child education, community impact and more through grants and loans. Find RSF’s CUSIP number on the Invest page of RSF’s website under “Terms and Interest Rates.”

Media Contact

Sarah Grolnic-McClurg

Thinkshift Communications

sarah@thinkshiftcom.com

(m) 415-828-3143


Disclaimer: This is not an offer to sell, nor a solicitation of an offer to buy, securities. Such offering is made solely by the Social Investment Fund Prospectus, and only in states where authorized. Past performance is no guarantee of future results. Rates subject to change. The Notes are unsecured debt securities subject to terms, conditions and risks described in our Prospectus, including risk of possible loss of the amount invested. Payment is dependent on RSF Social Investment Fund’s financial condition at the time payment is due.  Prospective investors should read the Prospectus for more complete information about RSF and the offering.  Electronic copies of the Prospectus and any prospectus supplements may be obtained by contacting Performance Trust Capital Partners, LLC at mshields@performancetrust.com.