3 ms·
It is quite reasonable--the idea is that your local system must not backfeed power even in case of failure. You don't rely on how it should operate, it must be
by LorenPechtel 5y ago
It is quite reasonable--the idea is that your local system must not backfeed power even in case of failure. You don't rely on how it should operate, it must be *impossible* for a failure to backfeed.
Thus, physical switches. The power company doesn't care what throws the switch, just that it exist.
- PaulDavisThe1st 5y agoThe problem here is that different power suppliers in different locations have different standards here. My 6.6kW array here in rural New Mexico is connected to the grid via an inverter that will, putatively, shutdown if the grid side drops. How does the inverter make it impossible for a failure to happen? How different is this from an automatic transfer switch (which would not be allowed)?
- LorenPechtel 5y agoWhat they usually do is design the inverter to only use line power as the reference to generate the output. No sine wave from the line, the circuit is completely unable to produce an output and thus shuts down even in case of failure.