Open Hardware/Software WiFi Energy Monitor.  Quality manufactured in USA, safety certified, and pre-loaded with latest firmware.

IoTaWatt monitors up to 14 circuits and can be accessed from phones, tablets and computers, locally or via the internet.  Retain data for years and also upload to several popular cloud services.

ECS16100 (100A) Back in Stock

Now Shipping Worldwide

By popular demand I've activated international shipping locations beyond Canada and Mexico to Europe, Australia, New Zealand and Japan

Delivery options are US Postal Service International Options.  Typical rates are about $22US up to two pounds, $34 up to three pounds, and it goes up from there.  If you are careful what you order, it should be under three pounds. This is a trial program.

At present, there is no 230V AC adapter available.  I expect to have Euro plug models available sometime around middle of December.  For now, you should order a bare unit and source a local 9V AC adapter.  The USB power supply available here is universal voltage with a US two-blade plug.  It can be used with 230V 50Hz with a plug adapter.

The CTs are voltage agnostic.  Typical 230V service would use the ECS16100 for mains (equivalent is all respects to a YHDC SCT013-000) and other circuits can be monitored with any of the 50A CTs such as ECS1050 or ECOL0950.

Any questions, please visit the forum.

Please Exercise Caution

IoTaWatt is a low-voltage device and has been tested to conform to established safety standards.  Nevertheless, it is used to measure high-voltage electric circuits. Installation of the passive current-transformers that are used to do this can involve a serious, potentially fatal shock hazard.  There are no shortcuts to safety.  Installation of current transformers inside electrical equipment, or anyplace that exposed high-voltage wiring may be present, should be performed by a qualified electrician.  Any instruction or guidance as to installation, placement, or configuration of the current transformers is intended to inform a qualified installer.