Daily energy usage plus costs

[ukmoose]

This thread might be a good starting point...

Calculate rainfall per 24h

So you will need to store the value. You can store values using context variables see: https://nodered.org/docs/writing-functions#storing-data Try importing this flow and see how you go [{"id":"9a549ce5.8953","type":"inject","z":"9726fcf.8cbf3","name":"Start of the day","topic":"","payload":"","payloadType":"date","repeat":"","crontab":"00 00 * * *","once":false,"onceDelay":0.1,"x":170,"y":400,"wires":[["4cdf847.94f0afc"]]},{"id":"4cdf847.94f0afc","type":"change","z":"9726fcf.8cbf3","name":"…