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Old 09-24-2022, 06:34 PM   #41
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I might be wrong but aren't homes with solar continously back feeding the grid when they produce more power than the house needs during the day then use that power at night to achieve a net 0 power bill at the end of the month . so workers have to always be aware of live wires during outage repairs. Not just because someone didn't throw their main when using a generator.
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Old 09-24-2022, 06:40 PM   #42
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I might be wrong but aren't homes with solar continously back feeding the grid when they produce more power than the house needs during the day then use that power at night to achieve a net 0 power bill at the end of the month . so workers have to always be aware of live wires during outage repairs. Not just because someone didn't throw their main when using a generator.
Most solar packages are designed to shut down during a power outage to prevent backfeed.
But you bring up a good point. My ex BIL was a lineman for a TX utility until he retired. Every linemen treats every wire like they are live, and most work is done after the power is shutdown for that particular segment. He always laughed when reading these backfeed concerns....
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Old 09-24-2022, 07:53 PM   #43
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I might be wrong but aren't homes with solar continously back feeding the grid when they produce more power than the house needs during the day then use that power at night to achieve a net 0 power bill at the end of the month . so workers have to always be aware of live wires during outage repairs. Not just because someone didn't throw their main when using a generator.
Backfeeding the utility from solar (or wind turbine) has to be tightly controlled for phase, frequency, and voltage. Base power has to be matched to be usable, which is why solar and wind are seldom used to their full advantage, including the solar and wind farms. Without base power, the backfeed cannot be made.

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Old 09-25-2022, 01:10 AM   #44
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Most Desktop computers and Monitors use "recessed male" power ports no power until a power chord is plugged in and then you have no access to the prongs.
Yup… but those are not fed from a breaker on the other side as the one on my garage will be. That breaker will normally be off, and I’ll have signage, but still. It will be better than a suicide cord, though.
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Old 09-25-2022, 06:07 AM   #45
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Most solar packages are designed to shut down during a power outage to prevent backfeed.
But you bring up a good point. My ex BIL was a lineman for a TX utility until he retired. Every linemen treats every wire like they are live, and most work is done after the power is shutdown for that particular segment. He always laughed when reading these backfeed concerns....
i can remember when during one of our hurricane related outages that i went out trying to find the source of the outage in the neighborhood and i found a line crew working on clearing a limb off a line a few blocks from me (the source of the problem.. happened twice in separate hurricanes, same place same tree.. )

anyway, it was late at night and in the stillness you could hear generators running; they commented that they had to be very careful as people may not have tripped their main breakers...

Bill
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Old 09-25-2022, 06:39 PM   #46
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anyway, it was late at night and in the stillness you could hear generators running; they commented that they had to be very careful as people may not have tripped their main breakers...

Bill
Another problem with a generator backfeeding onto the grid is that when power is restored it will create a phase-to-phase short and if you are lucky it will just cause a circuit breaker trip. However it could easily cause an arc flash (electrical explosion).

Solar panel inverters are phase matching - just like an inverter generator parallel kit. I'm not sure how they handle a loss of power from the grid - they would have to disconnect from the grid because the power could return at any stage in phase rotation. The solar inverter would have to remain disconnected from the grid until it could determine the phase rotation when power comes back on and match it.
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