What is a grid connected system?

Page 6 TERMINOLOGY 7. Grid-connected Systems Grid-connected systems usually consist of photovoltaic arrays, H30 indoor units, battery system, and the grid. When the electric energy generated by the PV string is sufficient, the surplus elec- tric energy can be fed into the grid.

What is energy storage system (ESS)?

ESS (Energy Storage System) is a way of configuring your grid-tie installation to usually behave as though it were an off-grid installationthereby enjoying the best of both worlds.

How do I prevent a solar charger from feeding energy to the grid?

Policy 4: Prevent feeding energy to the grid: There are two options here; first - use ESS, but do not enable Solar charger excess feed-in and it will always be connected to the grid. Or, use the Virtual Switch with ignore AC-Input. Policy 5: Connected to mains, no feedback: Use ESS, select the “Keep batteries charged” mode.

What type of inverter/charger does the energy storage system use?

The Energy Storage System uses a MultiPlus or Quattro bidirectional inverter/charger as its main component. Note that ESS can only be installed on VE.Bus model Multis and Quattros which feature the 2nd generation microprocessor (26 or 27). All new VE.Bus Inverter/Chargers currently shipping have 2nd generation chips.

Do I need a grid meter?

A grid meter is not required where there is no AC renewable-energy source(s) and also no AC load(s) present on the input side of the Multi/Quattro system (i.e. where all such sources and loads are on the output side of the Multi/Quattro system).

Do I need to install a grid-tie inverter on the AC-out box?

All loads and (optional) grid-tie inverters need to be installed on the AC out. Setting this to Disabled hides the AC-out box from the graphical overview. Use this in systems where there is nothing connected to the output of the Multi or Quattro, which is typical for certain grid- parallel systems in Western Europe.