Hi,
I'm an engineer but not in the field of electronics. I live in the countryside and here the water comes from a 0.5HP electric water pump to the house, from a water tank. There are power outages quite often in winter, so I have some batteries with a solar panel and a inverter to manually connect the pump in case of power outage.
So, I would like to have some device that senses when power outages occur and automatically changes from the 220V AC from the grid to 220V AC from the battery inverter.
I know there are solar system controllers or UPS that have this characteristic incorporated, but I would like to know if there is a more simple and cheaper device in the market and how is it called. The first thing I thought was a DPDT relay but I believe that it's not safe to wire two different power supplies there in case it fails. Or is it?
I'm an engineer but not in the field of electronics. I live in the countryside and here the water comes from a 0.5HP electric water pump to the house, from a water tank. There are power outages quite often in winter, so I have some batteries with a solar panel and a inverter to manually connect the pump in case of power outage.
So, I would like to have some device that senses when power outages occur and automatically changes from the 220V AC from the grid to 220V AC from the battery inverter.
I know there are solar system controllers or UPS that have this characteristic incorporated, but I would like to know if there is a more simple and cheaper device in the market and how is it called. The first thing I thought was a DPDT relay but I believe that it's not safe to wire two different power supplies there in case it fails. Or is it?