Shelly 120A Current Transformer Clamp

It’s so reassuring to see the secondary current stay proportional to the load like it should, and the clamp housing feels solid enough to leave in place for years. I checked it against my bench meter across a few loads and the scaling held up impressively well.

Ratios are dead-on across a range, and I love that the secondary output scales so cleanly with the primary load. Mounted it in my panel and the readings match my standalone meter within a few percent. Exactly what I needed for accurate energy logging.

The scaling is spot-on compared to my old meter, and the clamp fits snugly around my 100A feed. Hooked it up in five minutes, zero drift so far.