Expandable 6 Channel ESP32 Energy Meter Main Board


SKU: EM-6chan Category:


The Expandable 6 Channel ESP32 Energy Meter can read 6 current channels and 2 voltage channels at a time. Much like our Split Single Phase Energy Meter, the 6 channel uses current transformers and an AC transformer to measure voltage and power the board(s)/ESP32. Specifications are very similar to the split single phase meter, but the main board includes a buck converter with a higher output, and an ESP32 dev board can be plugged directly into the board.

Up to 6 add-on boards can stack on top of the main board to allow you to monitor up to 42 channels in high resolution, in real time, all at once!

This product is currently in the prototype stage, so components may change.

Backorder status


So far 40 orders have shipped with 20 to go. If you ordered an add-on board, 12 have shipped with 10 remaining. There is a slight delay while custom headers for these boards are made. They will be in next week.

For v1.2 of the board your voltage calibration will be high, >64,000. This is normal. Current calibrations will be around 30,000.

For more updates, please see our instagram page!


Testing is complete of v1.2 and everything works as expected. Changes from v1.1:

  • Fixed the power output of the on-board power supply
  • Fixed voltage reading being lower than expected
  • Fixed being able to read a second voltage from the 2 pin jumper – if you have v1.1, do not use the second voltage jumper pins!
  • Tied 2 LEDs to CF1, which is a pulse for active power
  • Added ability to tie the all voltage readings (there are 3 per IC) together via solder jumpers. This allows for more detailed metering values to be read.
  • Moved screw connector terminals back a bit

We expect to start delivering orders that were placed on 7/8 by next week after assembly and testing. It will take 2-3 weeks to build all of the boards that were ordered up to today.

If you cannot wait, and would rather receive a v1.1 board with a small fix for the low voltage reading issue, please let us know using the contact form, and include your order number. A $5 refund will be processed. 


7/13/19 – A revision of the main board and add-on board is currently being worked on to correct an issue with low power output from the on-board power supply. We expect to have a new batch of PCBs in next week. Then another 1-2 weeks to assemble and test the boards.

If you ordered between 7/1 and now, you’ll receive the new revision unless you request the current revision. Orders will be processed in the order that they were received.

Additional information

Weight 2 oz
Dimensions 4 × 4 × 1 in
CT Connectors

3.5mm, Quick Connect Screw

Include add-on board

No, Yes, Add-on board only


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