Subj : 3.5 weeks to being la
To   : Spectre
From : Arelor
Date : Sat Jul 23 2022 08:36:54

  Re: 3.5 weeks to being la
  By: Spectre to TassieBob on Sat Jul 23 2022 07:45 pm

 >  Ta> I would have expected the solution to that problem to be the same as fo
 >  Ta> systems without batteries - ie, the inverter detects the lack of mains
 >  Ta> supply and shuts off?  That's assuming your system is setup to export
 >  Ta> battery stored energy to the grid in the first place, which my first
 >  Ta> thought says would be an undesirable configuration anyway.
 > 
 > There's to much I don't really understand... how an inverter is going to
 > detect mains is online or not, especially you're going to be feeding into it
 > There was a school of thought that home systems with batteries could help
 > offset load demand at times solar for whatever reason couldn't. There was
 > also something about battery systems likely to continue feeding if the power
 > is required to be turned off for line works for arguments sake.
 > 
 > Spec
 > 
 > 

It is trivial to detect if the main has power and cut off via relays/switches
whatever. You can do that with off-the-shelf hardware purchased in the
electrotechnics supply store.

OFC real life deployments have controllers which are more sophisticate. SOme
diesel generators come with pluggable modules that can be used to detect that
the power from the main line is down and kick the generator into motion to
serve as a backup supply. If you pair that with an automated transfer switch,
you just got backup power that cuts-off from the grid and kicks in
automatically. Then again, you can buy the supplies for this easily.

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