Pool pump special system: We propose to consider using a specially designed pump-system (German) which directly connects to a dedicated PV panel, thereby removing this large electricity user forever from your electricity bill. Again, the pump optimises the power available at sunrise to sundown for circulation, with no maintenance for the owner. We found these systems very reliable, and an added benefit is the ample solar energy during the summer when pool pumps need to work extra hard. In winter, one could transfer this PV power to an net-synchronous inverter, as per above. Additionally these systems can be easily connected to special poolheating panels, this way creating a fully solar powered pool filtering and heating system.