@tm_mechanical, power draw of the Sense monitor is very low - something like 2-3 watts Always On. I run both of mine off the same breaker (I have two orange Sense monitors, one that uses the FlexCTs for solar, and the second one purely for DCM for my EVs).
One other piece of useless history - I had my orange main monitor working with a couple of Wiser smart devices through the Wiser Integration until Sense depreciated. The integration worked OK, but occasionally threw out huge phantom power spikes often measuring close to 1/2 MW for 10 LED bulbs 