Sizing of the system
The sizing of PV-array and pump was then made on the basis of the water demand, total dynamic head, solar energy available and efficiency of the system. The system was sized on the basis of the worst month marked out by the lowest ratio between monthly daily average solar radiation and monthly daily average water demand, as shown in Table 2. June presented the lowest ratio between daily solar radiation and water demand especially due to the highest water requirements registered during the irrigation period. June was then