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by rsync
1047 days ago
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"To do this, a switch needs to physically disconnect the utility meter from the main loads panel ... this is the hard part. It doesn't need to be. You can just use a physical interlock and toggle between utility breaker and (any input you want) breaker. You can do this on an integrated meter panel. This is a dead-simple configuration that you can comprehend - and verify - with your own eyes. The lock-out switch is NEC compliant, utility approved, etc.: https://www.amazon.com/Generator-Interlock-Compatible-Homeli... Yes, you do lose all power for a second or two but ... so much simpler and comprehensible than an ATX solution. |
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Is it currently possible to do this with a battery setup, for which its normal state is to feed power to the grid with anti-islanding?
Either you'd need two power connections to the panel - one for the every day anti-islanded backfeed, and then a second with the physical lockout to a different inverter output that operates without the grid.
Or the lockout on the main breaker would need to control a logic-level switch that told the inverter to disable anti-islanding, for power flowing through a separate non-locked-out breaker. This would seem like a better solution, but the inverter/battery manufacturer would have to design for it and get NRTL approval.