A very cool and low cost mod. I'm a measurement geek, and anything that loads me up with data is just fine by me. I don't recommend most people go poking around in the back of their power panel, unless they are like you and know what they are doing.
I have tons of stuff monitored on my 5er. All available on the internet. Here is my blog on my monitor system.
https://www.leisuresolar.com/post/mo...ing-experience
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