I’m from New Zealand, and I was going to purchase the clamp meter to measure my total energy usage.
I have a 80A feed (230V) from the street and all our vehicles, cooking and heating are electric.
Just wondering how accurate is the clamp meter? Ive done some general reading on Clamp meter technology and it appears that they can at times be quite accurate but at other times not so much. I’m looking for opinions from people who have this set up – how accurate do you find it?
Additionally, I see there is an ac-ac power brick to help increase the accuracy of the energy measurement. This brick is only available in US, UK and EUR style plugs - not AU/NZ plugs. I’d rather not use a power Point adapter - is there one I can get locally sourced with identical spec to the one in the open energy monitor store?
I’m not sure exactly what equipment I should get - my goal is to accurately monitor power usage in the most cost effective way possible. It looks like I will at the very least need an emonPi pre-built which includes the 100A current sensor and the AC voltage sensor that you linked.
I could run EmonCMS in a container/virtual machine (I already have a fairly complex infrasturcutre with a bunch of VMs etc running on my home server) using this guide github com/emoncms/emoncms/blob/master/docs/LinuxInstall.md
Don’t worry too much about that, but we can only answer the question you ask - not the one you intended to ask.
Yes, that must be the cheapest. From what you say, I take it you’ll be happy setting up emonCMS on your own server - it’s just that it is tailored to the RPi and some people have struggled - and I am reasonably certain that the guide will be out of date, because the last update to the software was fairly massive, and the documentation is still being worked on.
And without the 5 V d.c. P.S.U, there isn’t enough power to supply the rather high current demanded by the ESP8266 (a deliberate design decision - it’s current limited as otherwise, it would put too big a dent into the a.c. wave shape that you’re trying to measure).