importing MQTT values

[robert-b]

in general it is not a very good idea to start specific work at a given time. in this case starting to generate hot water at 12 o'clock. the availability of solar energy changes this quite a bit. making 2 scratch topics from your moscitto server available in a heishamon script would make dynamic work much easier. what do you think?

[geduxas]

Heatpump don't have time priority to reheat DHW.. it's just temperature drop which is indicating for it.. and also it have force DHW.
But yes, every atemp to consume sollar power is welcome :)

Also have you checked NodeRED integration? It's have Solar²DHW built in, it's monitors your energy import/export and by that could force reheat DHW

[robert-b]

which solar 2 dhw nodered example?

[geduxas]

Look here: https://github.com/edterbak/NodeRed_Heishamon_control

[robert-b]

it was just a very very very very simple szenerio ...
imagine there is a buffer tank.
some shit AI/ki says it should be charged with a temperature of 32 degree celsius starting at 16:30 ...

[KelasHA00]

Unsure if its on topic, but if it is about using excess solar to heat up water;
Apart from the below i added some Zigbee switches in the wiring on the some buffer tank heat elements that switch on using the same basics.

Im using HA automation to monitor a given solar export sensor and then action on raising the DHW temp by x.
Ex. WHEN export_to_grid_sensor is >2000 for >00:01:00 THEN DO number 'set' target DHW temperature to 60°
and to reset the automation
WHEN export to grid sensor is <500 for >00:02:00 THEN DO number 'set' target DHW temperature 50°

[robert-b]

this is more ore less the idea i have.
i keep hm as a black box.
the additional hw is on it's way.