Automatic control of water heater with Shelly and NodeRed on sailboat

Modifications Node-RED
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12

I have now resolved all TODO items from my opening post:

  1. I have switched to SignalK embedded NodeRed and disabled Cerbo’s NodeRed. This allows me to have access to SignalK and Victron nodes at the same time.

  2. Added simple overload protection: if inverter load gets above 1200W, heater is turned off. If heater should be turned on and the AC load is already high, do not turn heater on to not cause overload.

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I have also added chart with SOC and time when switch is turned ON/OFF, so that I can inspect what was going on in past 24h.

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This is my new flow for SignalK embedded NodeRed:
nr-signalk-flow.json.zip (12.4 KB)

Thank you all for support and for putting SignalK and NodeRed on Cerbo.

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