Shelly Current Transformer Pro 3EM

The installation took maybe ten minutes since the clamps are clearly marked, and the current readings match my utility meter within a few watts. It’s a solid upgrade if you’re already tracking three-phase loads.

The clamp fit is snug and the readings match my utility meter almost perfectly. Setup with the 3EM took under ten minutes and now I can finally see exactly which circuit is eating the most power.

Went from vague "estimated usage" to actually seeing per-phase current draw in real time, which was the whole reason I bought these. The clamp design feels solid and the measurements match my utility meter within a couple percent.