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A comment on The cases of consumer-grade routers on puny power supplies. Parent comment

Re:The cases of consumer-grade routers on puny power supplies by mindslight on Thursday January 09, 2025 @06:07PM (#42650771)
When I hooked a Raspberry Pi (model B maybe?) up to an analog input on my Marantz NR1605, the UI of the receiver got noticeably laggier until it was barely responsive. Disconnecting made the UI perk back up. I noticed the Pi had a 2.5V DC bias on its audio out. I didn't investigate further.

As for the article, I'm left with more questions. Surely the solar inverter wasn't running all the time in series, like a double conversion UPS, right? So how how would the mains waveform have been significantly affected in normal operation?

Also those scope traces, what's the scale? Are we talking 100mV dip, or a 1V dip? And is that a storage scope, or is that one cycle of the supply's ongoing ripple? And the complete lack of any dip on the "fixed" trace with extra capacitance makes me wonder if they even got the triggering right.

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Re:The cases of consumer-grade routers on puny power supplies by CoffeeOnWrite on Thursday January 09, 2025 @09:14PM (#42651809)
I think the inverter is always running in between the batteries and the AC outlets. It's a dedicated "solar circuit".

I have questions. What's the point of a dedicated solar circuit? They are leasing from their "local lines company". If the lines company is in the leasing business, this system must be grid-tied right? Why the dedicated solar circuit?

Also, is it common for full sine wave inverters to produce power less clean than the grid? Maybe when the batteries are low? Curious.

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