You need to read the "covenants, conditions and restrictions" recorded upon your condominium as well as your association's rules concerning in that these documents will set forth the protocol as to increasing fees and assessments to each individual homeowner and the use of these fees.Typically, the above documents mentioned will set forth voting requirements for increasing fees and assessments and how these are utilized to assist you. The voting rights of the individual homeowners on these assessments could dictate whether the solar panel installation gets approved or not.One reason why your association has limited funds now is most likely due to homeowners in your complex not paying their monthly dues and losing their homes in foreclosure.Good luck.