Energy storage station wiring process

How does ESS work?

ESS can be configured to optimise self-consumption or to keep batteries charged. When there is more PV power than is required to run loads, the excess PV energy is stored in the battery. That stored energy is then used to power the loads at times when there is a shortage of PV power.

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. See chapter 2.1.3 .

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.

When does the system automatically recharge the battery (from the grid)?

The system will automatically recharge the battery (from the grid) when the SOC drops 5% or more below the value of ‘Minimum SOC’ in the ESS menu. Recharge stops when it the battery is recharged up to the Minimum SOC level.

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.

Why is my ESS system not charging?

In case that shows zero, the battery is telling the system to not discharge any further. Thirdly, feed-in may be disabled because the ESS Relay test is still pending: the inverter/charger (ie Multi/Quattro) in an ESS System needs to perform a relay test before it can use battery power.