650kw solar with planning and grid connection

Ready to go 650kw solar project - with planning, grid connection secured and Gov SRESS tariff of 13c/unit index linked for 15yrs also secured; funding sought 700k- options open 1. Full funding 2. 500k funding for solar panels etc - may suit solar supplier(have 200k available) As the Gov scheme is for 15yrs - funding would be needed for same period but is Guaranteed and 5% rate