SYSTEM 4 View larger

System 4-D (Donut CTs)

New product

- 96 Energy monitoring channels! 

- DashBox for Data Logging and Dashboard.

- Inclues 54 Donut CTs for breakers up to 40A.

- Add more CTs based on your panel's requirements.

pdficon_small.png How many Current transformers (CT) and channels do I need?

*** All additional CTs in the cart with this System will be discounted 25% Off.

More details

GEM and DashBox Manual  Download (4.19M)


Additional Items

More info


This system is designed to monitor most medium to large homes having two or three panels. The included CTs are the most common branch circuit sensor for breakers up to 40A. Since electrical panel circuits and amperage varies from home to home, you can add additional CTs to match your panel’s requirements.


  • Autonomous system with DashBox webserver. No internet required!
  • 96 energy monitoring channels
  • 12 pulse input for water and gas meter
  • 24 “1-wire” temperature sensor capability (sensors extra)
  • Capable of NET metering from any of the 96 channels

Package Contents:

  • 2 – Base model GEMs.
  • 1 - WiFi/Ethernet GEM.
  • 1 -  DashBox.  
  • 32 Gig High Endurance MicroSD card memory.
  • 54 - Donut CTs for breakers up to 40A (30A if you have aluminum wiring) provides a starting point for your specific application.
  • 2 - RS-232 Cables.
  • Power adapters.
  • Potential Transformers.


For residential single or split phase services only. Not for commercial 3 phase systems