1) Bahamas
2) Barbados
3) St. Lucia
4) St. Vincent and the Grenadines
Explanation:
St. Vincent and the Grenadines became the 79th member of International Solar Alliance (ISA). Countries which have signed the agreement until now include Bolivia, Palau, France, Australia, the United Arab Emirates, the United Kingdom, Japan, amongst others. The agreement was opened for signature during the Conference of the Parties (COP) 22 at Marrakech, Morocco on November 15, 2016.