Nehmo
10 kW
Many homeowners, the richer ones anyway, have a backup electrical system to power their essentials in the event of a grid failure. In some areas where outages are common, backup systems are common too. Usually, these systems are natural gas fueled generators that produce 120 volt (in the US) AC to mimic the usual line electricity. Nowaday, considering the dropping cost and according tax credits for solar cell and battery (or just battery) systems, these kinds of systems are becoming more popular. But the wrinkles certainly haven't been ironed out yet.
I would suppose the battery system should supply 120V, and commercial ones go with regular AC. But AC is only necessary in appliances that have transformers. And inverters that convert battery DC to AC are inefficient and suffer from dirty-waveforms. So, maybe 120V DC also should be routed through the house, and DC should be used if possible. If that's the case, then how should it be done? Should there be 2 receptacle outlets everywhere, one for DC and one for AC? Or should there be a switch at every receptacle outlet giving the option? Should DC and AC have different connectors?
This must have already been thought out by several people. Does anybody have any ideas?
Below is an example of a battery home circuit. It doesn't have DC distributed in the house, but it shows the typical elements of such a system.
I would suppose the battery system should supply 120V, and commercial ones go with regular AC. But AC is only necessary in appliances that have transformers. And inverters that convert battery DC to AC are inefficient and suffer from dirty-waveforms. So, maybe 120V DC also should be routed through the house, and DC should be used if possible. If that's the case, then how should it be done? Should there be 2 receptacle outlets everywhere, one for DC and one for AC? Or should there be a switch at every receptacle outlet giving the option? Should DC and AC have different connectors?
This must have already been thought out by several people. Does anybody have any ideas?
Below is an example of a battery home circuit. It doesn't have DC distributed in the house, but it shows the typical elements of such a system.