A Wi-Fi voltage monitor?! That's awesome! Please share some details. I'd l love to learn more about this. I have an Arduino, some raspberry pi's, esp32's that I've never really come up with a project that excited me enough to use them. This would be definitely worth it! I've always thought that...
Is there any idea on the potential cycle count these could have? The idea of potentially building a power wall, almost a Tesla 2's worth of power, if you get two of these for only $1,200 is VERY interesting.