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A comment on Hacking Portable Air Conditioners. Parent comment

Re:Hacking Portable Air Conditioners by p1mrx on Sunday August 02, 2020 @12:49AM (#24026431)
The Nest can sort of trickle charge itself through its relay outputs, but for reliability you really want to provide 24VAC between R<->C.

To attach equipment, you can connect a 24VAC-friendly load between (e.g.) Y<->C or W<->C.

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Re:Hacking Portable Air Conditioners by danbr on Sunday August 02, 2020 @12:28PM (#24029624)
Didn’t know about the trickle charging, neat!

Problem with attaching a load is that if you want to build a standalone unit with the nest, you’ll need some type of inverter when powered off DC, or perhaps a simple sine wave generator? I’m more of a digital, DC power guy.

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Re:Hacking Portable Air Conditioners by p1mrx on Sunday August 02, 2020 @02:32PM (#24030497)
Yeah, you need a sine inverter, either 24VAC, or 120VAC with a 24VAC transformer.

There might be a way to trick the Nest into running on something closer to DC, but I could only guess.

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