Energy Storage Container User Manual

How do I use ESS battery life?

Connect to AC when available, keep batteries charged: Use ESS Assistant and select the “Keep batteries charged” mode. • Not available in the ESS System yet, but it will be implemented. The ESS BatteryLife feature will make sure that the batteries are not unnecessarily cycled around a low SoC.

When should ESS be set to 100% battery capacity?

When utility grid failures are extremely rare, it could be set to 100%. In locations where grid failure is common, or even a daily occurrence, such as in some African countries, you might choose to use just 20% of battery capacity and save 80% for the next grid failure. ESS can also be configured to keep the batteries fully charged.

How do I feed-in PV power via an MPPT solar charger?

Feed-in of PV power via an MPPT Solar Charger can be enabled or disabled in the Energy Storage Systems menu on the CCGX. For grid-tie inverters, the only option is to use a Fronius grid-tie inverter and use the Fronius Zero Feed-in function.

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.

Are there user-maintainable parts inside the battery unit?

There are no user-maintainable parts inside the battery unit. Only personnel approved by SUNGROW can remove, replace and dispose of the batteries. Users are not allowed to maintain batteries without guidance. To avoid electric shock, do not perform any other maintenance operations beyond those described in this manual.

How do I set up an ESS system?

There are a few different ways to set an ESS system up. A combination of these are possible as well: See below drawings to get an idea of all possibilities. The first drawing shows the wiring when a MultiPlus-II is used; and the second one shows how it is wired with a MultiPlus or Quattro.