I have a MultiPlus 2 6k5 and a 32 kWh battery. Since, like many people, I don’t have unlimited time, I initially connected the system in parallel to the PV circuit. This gives me a 25 A limit to the consumer unit.
I’m going to run two 10 mm^2 cables under the house to convert the system to a series installation with a backup power function.
But of course I want to get the system up and running as quickly as possible, hence the initial parallel option.
Situation: the MultiPlus is connected only to AC-in, and the PV system is also connected there. I have a Cerbo and an EM24 that measures the PV output.
My problem: the cable is protected by a 25 A fuse. In theory, the PV installation could deliver 5,000 W, but it doesn’t often exceed 4,000 W. I have limited the inverter power to 2,000 W. Yes, I know, technically that is slightly too much.
I’m now trying to create a control system with Node-RED. Put simply: 5,000 W - PV output = maximum inverter power. I managed to get this working with the help of ChatGPT, but now there’s one final step: which node can I use to send this to the MultiPlus? ChatGPT doesn’t know either and wants to control it via a workaround.
Do you have any good ideas?
Many thanks in advance.
Roel
