My house is equipped with an inverter 1500w. The inverter provides a nice supply when already connected to an ac outlet which charges its battery simultaneously. But the problem is that when the ac supply gets cut off, the inverter provides the power supply(+) even when the switch is off in the board at wall outlet, that too in both the pins (+&-). Kindly help me to stop it. Any furhther queries may be asked? Thanking you in advance.