EKM Metering

Thanks. Just the info I was looking for. Can I use a GFCI breaker as a reference? I'll report back on my progress.

I built an addition that houses a subpanel for the electric for the addition as well as our hot tub. I would like to install a submeter to monitor the kw used by the subpanel. It looks like a typical install (see pic). So my parts list is: EKM-OmniMeter II UL v.3 – Universal Smart Meter, Single Phas...