I have an existing Multiplus II 48/5000 thats working well with its own batteries and running ESS on a G99 connection in the UK. There is minimal grid export via AC 1 as I have no export tariff, but obviously it does export a bit.
Can I add a second Multiplus 48/3000 with its own batteries running a separate circuit of IT kit on its critical loads output. I don’t want to parallel them, I want it to be a standalone system that charges batteries at night from the grid, and then runs a relatively fixed load of IT kit on the battery during the day and thats it.
I know the common setup is to parallel, but in this instance I’m happy to run both standalone with their own batteries and controllers etc. They would share the incoming grid feeds in the sense they are fed from the same consumer unit (separate circuit for each though) but thats it.
My only concern was if both units were to export back to the the same grid connection at the same time whether this presented any issues.
I see a lot talk of the complexity of parallel setups - am assuming its the concurrent load balancing of the two units that causes the complexity, and not any export concerns?
How does load matching work on AC1 if they don’t feed back though? Or do you need to run all loads on the critical output only without a grid code I assume?
Do you have solar and plan to use ESS on the second inverter or just conditional connect to grid at certain times?
Sounds like you are wanting to cycle the battery?
No solar in use - just plain charging from the grid at night and use the charge during the day.
I need a faster charge rate as I can’t charge my batteries within the cheap night grid window. So I figured either split out to two separate inverters, or upgrade the current one to a 48/8000 or 48/1000 but I really don’t need that much output, just the faster charge rates.
I couldn’t find a standalone 48v charger, so figured splitting the batteries and inverters keeps things simple also.
