I’ve built myself a large-ish UPS from a couple of surplus LiFePo4 batteries and an inverter/charger of th etype often found in RVs/campers. At present, I have a set of Kasa/TP-Link smart plugs scattered across the house, and in particular I have one of them at the plug between the wall and the UPS/inverter and another at the inverter’s output plug.
This setup allows me to do a few things:
- turn off the load on the inverter in case I need to
- turn off the input supply to the inverter, which allows me to manually test and/or cycle the battery system itself
- compute the efficiency of the inverter - if I can measure watts and watts out, I know what’s getting wasted inside the inverter/charger.
Anyway, that’s somewhat contextual and not my actual question
In this setup, if plug1 is between the wall and the inverter and plug2 is the output of the inverter, Sense sees both of these devices as on and connected, but it does NOT have any way to know that the watts from plug2 have already been counted (by plug1). This means that I’ve got anywhere from a few dozen to several hundred watts of power that’s being counted incorrectly and (presumably) throwing off lots of other computations.
Any suggestions as to how I might mitigate this?