I have a 25 Unit Apartment Building Complex in the Caribbean where I purchase Electricity at extremely high rates from the Utility. Reliability and quality of Supply is also below accepatble standards. It is my desire to have a back up or alternative source of supply but cannot afford an expensive system at this stage. I am seeking to source a Used 15-20KW; 3ph; 220V; 50Hz; Diesel Alternator Unit initially to satisfy immediate nees and gradually build up a Solar Voltaic System to eventually reduce on noise and hydrocarbon pollutions. Can someone either comment on this idea or maybe offer alternative suggestions? Also anyone know of the availability of a suitable unit?