Overview
The IAMMETER WEM3046T is a three-phase Wi-Fi energy meter built for installations where standard bundled clamp kits are not the best fit. It is especially useful when a panel already uses 5A secondary CTs, when conductors are too large for common 100 A to 500 A split-core clamps, or when a solar or industrial monitoring job needs more freedom in CT selection.
Core fit
The WEM3046T keeps the open-integration style IAMMETER is known for, but shifts the current sensing model toward installer-selected 5A CTs. That makes it more flexible than many homeowner-focused meters, especially in larger switchboards, commercial sub-metering, or solar-adjacent monitoring where higher CT ratios are already normal.
Installation and measurement
This is a 2P DIN-rail meter with an external Wi-Fi antenna. It does not ship with CTs in the standard package, so buyers need three compatible external CTs with a 5A secondary output. IAMMETER's current documentation positions it for three-phase systems first, while also describing split-phase and single-phase use when configured appropriately.
Connectivity and integrations
IAMMETER presents the WEM3046T as both a cloud-capable and local-friendly meter. Current official documentation supports IAMMETER-Cloud, local LAN monitoring over HTTP, third-party integrations, Home Assistant support, and RS485 Modbus RTU on the meter itself. That makes it a stronger fit for users who want open data access or self-hosted workflows instead of a cloud-only monitoring path.
Solar and import/export fit
The device is bidirectional and is shown in IAMMETER's current solar PV monitoring guides for tracking import, export, and site consumption. That makes it useful for solar homes, workshops, or light commercial sites that need clearer visibility into grid exchange and load behavior.
Watch-outs
The biggest buying caveat is that the meter's maximum measurable current depends on the external CTs you choose. IAMMETER shows examples such as 1000:5, 1500:5, and 2500:5 CTs, so there is no single fixed amp rating that safely represents every WEM3046T installation. Buyers also need to be comfortable sourcing suitable CTs rather than expecting a ready-to-install bundled clamp kit.
Buying and source context
IAMMETER's official store currently lists the WEM3046T at USD 180. IAMMETER's current purchase guide also shows the model in the official global catalog with local warehouse availability noted for markets including the USA, Germany, and Australia, alongside broader direct global ordering paths.