NOVELTY - The manufacture method involves depositing electrolyte into the serially connected cells of a photovoltaic cell array, and sensing the level of the deposited electrolyte. The series-connected sequence of the cells is defined by a primary electrode array (301) and a counter electrode array (302). Each cell contains electrolyte which is insulated from direct electrical contact with the electrolyte of the neighboring cells. The rate of deposition of the electrolyte is controlled in dependence of the sensed level of electrolyte.    USE - Photovoltaic cell array manufacture method for use in e.g. generating electricity. Uses include but not limited to generating electricity by floating the array on the surface of water and subjecting the array to a source of light, desalinating a body of seawater by floating the array on the water, subjecting the array to a source of light, such as sunlight or even moonlight, and using the resulting electricity generated by the array to power the desalination process using reverse osmosis, reducing evaporation from the surface of a body of water by floating the array of photovoltaic cells on the surface, and heating a swimming pool by floating the array of photovoltaic cells on the surface and connecting the output of the array to an electrically powered heater.    ADVANTAGE - Provides a method for manufacturing a photovoltaic cell array in which the electrolyte can be easily deposited within the cells of the array while ensuring that the required thickness of the electrolyte layer has been achieved. Achieves desired thickness of electrolyte in the cells to optimize the performance of the resulting array. Ensures efficient and reliable control and correction of the rate of deposition of the electrolyte based on the sensed level of electrolyte. Ensures precise alignment of roller axis in relation to fixed guide tracks.    DESCRIPTION OF DRAWING(S) - The drawing is a sectional view illustrating how the primary electrode array and the counter-electrode array are joined together.    Primary electrode array (301)    Counter electrode array (302)    Rollers (305,306)    Dosing valves (308)    Optical sensors (309)