Hi all, I don’t expect there to be a discussion that isn’t related to my question. So let’s get back to basics:
I want to do this through Victron using Node-RED. Is this feasible with these components? Too complex? Insufficient capacity somewhere?
If your devices can be controlled through a nodered accessible node or API then you can do anything.
There are plenty of smart switches, some mountable in your DB, that can be used to add capabilities.
You would want a grid meter as well, don’t cut corners here.
15kWh isn’t a large battery capacity, what size inverter are you planning to use?
You want to match battery performance, not capacity to a inverter/charger.
You need to size capacity for the consumption you intend having, ideally covering as much as possible from battery overnight without solar, or based on charging during cheap buying periods.
You’re a bit stuck with a wood fire, not much nodered can do for that. 
Well, you can switch a boiler on or off, and, where applicable, reduce its output slightly (in the case of a wood-gasification boiler) while the fuel is burning.
Otherwise, the total heat output generated depends on the amount of wood loaded (excluding pellet boilers, which are controllable).
Pellet stoves are a different kettle of fish.
That’s understandable, Jeroen,
data prepared for a client isn’t public!
I wouldn’t start with this (COP=1): it uses a lot of energy, and in a few years we’ll also be paying for the grid connection per kWh (the Netherlands).
Then even the heat pump will become a subject of debate.
At the moment, I have a number of infrared panels to raise the perceived temperature (they work reasonably well, save me a lot of gas and are an inexpensive solution).
I’m missing solar panels from your overview—or do you not have a suitable roof for them?
works in canada i have since2008 heats the house when -24 outside. and even colder but the cop reaches 1 so i then turn on eleectric heat assist.
yes its all possible, its just how the interface will work, at worse you can use digital switching to turn on and off the compressor , and heat / cool valve, and then potientiall control the power levels,
or if the device has wifi the temp set point can be pulled in via various intergrations / mqtt. or some of the new standards.
I would highly suggest you use Home Assistant for controlling the smart home. Home Assistant can recognise devices on the local network, it’s the correct tool for the job.
Home Assistant can also run Node Red, it’s what I do, also using MQTT its very easy to pass values between Home Assistant and the Victron system.
Both my systems work together, Victron handles the power storage and generation, Home Assistant does the rest.
As for my heat pump, its saving me a fortune as I run it on off peak electric from my batteries, and I’m easily getting a COP of 4 or more, I’d suggest something is wrong with the other person’s installations, understanding or testing. Unless you have fan coils for radiators on an air to water system, it won’t cool very well at all. Mines purely heating.
Based on all the above posts, I’m thinking about the following:
What I have now:
What I want:
The heat-pump water heater needs to be controllable via Victron using Node-RED, Shelly or Wi-Fi
The radiators need to be controllable via an app
Would this be a workable setup? I could possibly add another 5 kWh battery if necessary.