For U.S. Folk, primarily.
Yellow/Orange meter is a Frient EMIZB-141
Blue, as stated is Refoss in my panel.
But it’s cool that they are both that accurate.
Nobody? Someone knows the answer…
The outside?
True…but not the answer I was looking for.
The Answer: The electric meter is on the east side of my house.
If you notice the discrepancy in the graph, the Frient meter reads lower values for only part of the day but is otherwise dead on with the Refoss. The Refoss, being inside my panel and the Frient, stuck to the meter on the outside of my house.
The Frient reads pulses of infrared light from an LED on the meter. When the sun rises, in the east, the meter is exposed to full sun, which overwhelms the LED’s light and the meter misses some of the pulses it needs to be accurate. Hence, the values are lower, from about 7am to 12pm when the sun finally passes overhead. After the sun is no longer shining on the panel, the Frient is dead accurate.
It’s interesting, to me, any way, and something purchasers of the Frient sensor might want to know.