Adding a second Multiplus 2 (ESS, 2 phase config)

DIY
, ,
1

Hi All

  • I have a 3 fase grid connection.
  • I have currently 1 Multiplus 2 - 48/5000/70 in ESS mode running (on 1 phase obviously) with 16kWh battery
  • I want to extend system as follows:
  • Add a second Multiplus 2 (create a 2 phase system - which seems OK) and add a 2nd battery to same bus bar (same type as battery 1) and keep ESS setup.

Questions which I have

  1. Can the 2nd Multiplus (on phase 2) be a smaller type (eg 3000VA model) or does it have to be also 5000VA (and similar hardware/software revision)? The multiplusses will be connected to their own phases (and not parallel on phase 1). Capacity wise, a 5000VA + 3000VA would be enough….
  2. In winter time, when there is little solar, can I switch off one of the multiplusses (switch to 0) and system will keep running (to save some of the idle power consumption)?

Thanks

Hans

2

You need the same units on each phase.
No, with ESS you cannot switch one off.