Hello!
I have a multiplus-ii GX I am trying to set up in my semi-gried tied operation.
I am using the MP-ii with a 48V Battery pack, a smartsolar 150/45 and with grid AC mains in and ALL loads on the AC out.
The logic I want to have is as follows:
- Grid AC Charges the batteries at set times (off-peak electricity cost) to a set max SoC. Buffer SoC to allow my modest solar setup to top up the batteries in the day.
- Zero export to the grid
- Batteries run all loads outside of off peak times.
- Ideally the logic is controlled from my home assistant that is connected to the multiplus through the MQTT HACS integration as I can pull my electricty suppliers pricing in through their API and adjust parameters easily/automatically.
My initial thought is to somehow control the main AC in relay inside the multiplus to achieve the same effect as just unplugging the input cable but having read through lots of threads and everyone having slightly different needs, it is very confusing.
I now think the best option is just controlling the AC input limit parameter that I can access easily through HA.
E.g. Have an automation that sets the input limit to 32A during my off peak hours and set the limit to 0A in peak hours. Then if battery SoC drops to 10%, set input limit to 32A and ESS min SoC limit to 10%. This should pass through the mains but not charge the batteries.
Will this work? I am not back at the location of the equipment for a few days so I want to be prepared with a plan!
If I do the above plan, can I limit the SoC when mains charging but not limit the solar charging?
Thanks!