All D.C to A.C inverters on the market today have a current draw even when there is no load on the output. Some have remote controls , and some have load current feedback.  All of these waste power ! As power is precious especialy in a solar charging battery application. We have designed a Load Detection switch that (with the inverter switch on) draws no power until a load is detected on the A.C output . The inverter is switched on through a high current relay on the d.c side of the inverter. When the load is removed and no a.c current is drawn the L.D.S open circuits the relay thus powering down the inverter.  This is perfect for use on remote power supplies or lighting circuits when a.c  is not required continuously .