Because money is involved, Solar Dividends must be handled by a trustworthy institution. Because Solar Dividends can last a lifetime, the institutions must also be long lived and stable.
Private corporations would not be suitable, because they seek to maximize profit for their shareholders, not the recipients of Solar Dividends. They are also subject to being bought out and repurposed. Instead, electric cooperatives would be the best type of institution to manage Solar Dividends.
Electric cooperatives have existed in the United States since the 1930s when they brought electricity to rural America. Many have been in operation for over 90 years, demonstrating they are long lived and stable. A cooperative is also run by its members, who would be the recipients of the Solar Dividends generated by the coop. A coop’s procedures are transparent, and their books are open to inspection. A coop’s goal is to maximize benefits to its members, so it would seek to hold down overhead costs.
A government body could administer Solar Dividends. Government institutions have experience handling money and are long lived. However, in some places government agencies are not trustworthy with money. Even if an agency is trusted, in a lean year it could decide to divert some of the solar revenue to balance their budget rather than pay out Solar Dividends.
These approaches and others are described in more detail in Chapter 13 of the book Solar Dividends: How Solar Energy Can Generate a Basic Income for Everyone on Earth.