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A project log for Electric Water Heater controler

To Control an electric water heater to only use the surplus power from my 3KW PV array

saabmanSaabman 05/09/2016 at 11:230 Comments

Well that looked like a good idea at the time.

I deisgned my circuit couldnt have been easier a pin on a node MCU connectes to the optoisolated triac driver - connectsto triac - connects to load.

A0 looks like a great pin for an output im going to be sending a PWM signal to the opto to control the power available to the heater. What A0 is the analog input not the analog output......

whats a prototype PCB with out a jumper here and there :)

Now thats sorted out and some basic code slapped together to get the nodemcu taling to the energy meter and truning my test jug on and off.

The heatsink isnt big enough on the triac - nothing an extra bit of aluminium wont fix. but it works.

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