Subj : 3.5 weeks to being la
To   : Spectre
From : TassieBob
Date : Sat Jul 23 2022 20:25:26


 Sp> There's to much I don't really understand... how an inverter is going
 Sp> to detect mains is online or not, especially you're going to be
 Sp> feeding into it.

I'm not sure what the exact mechanism is, but it's a requirement for any grid connected inverter - for exactly the reason you mentioned (safety of those working on the power distribution network during outages).

 Sp> There was a school of thought that home systems with batteries could
 Sp> help offset load demand at times solar for whatever reason couldn't.

I don't doubt there are use cases where embedded storage such as batteries can help support the grid, but if I were an embedded storage owner I'd be unlikely to participate in such a scheme - at least while feed-in tariffs are as low as they are.

Why would I use my solar to fill my battery storage, then let the grid suck it dry at $0.06/KWh when I can use it myself and save $0.26/KWh?

 Sp> There was also something about battery systems likely to continue
 Sp> feeding if the power is required to be turned off for line works for
 Sp> arguments sake.

If they're using compliant grid-tie inverters then that shouldn't be able to happen.

I /think/ there are storage systems that can continue supplying power to your premises while the mains is out - like an oversized UPS - but I'd expect they would have an isolation contactor or similar to stop that power going back to the grid.

Any sparkies in here with knowledge of solar and embedded storage? :-)


--- GoldED+/LNX 1.1.5-b20220504
 * Origin: TassieBob's BBS (21:3/169)

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