11.6. DVCC for systems with the ESS Assistant
• The ESS Keep batteries charged mode will only work properly with DVCC enabled.
• A fixed solar offset of 0.4V (value for 48V system, divide by 4 for 12V) is applied when ESS-mode is set to Optimised in
combination with the Feed-in excess solar charger power-setting enabled, or when ESS-mode is set to Keep batteries charged.
• For system with ESS mode Optimised and Optimised (with BatteryLife): 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
reaches the Minimum SoC.
• ESS status display in the graphic overview of the GX device and on VRM: In addition to the charge status (External Control or
Bulk/Absorption/Float), the following status can be displayed:
ESS status Meaning
#1 Low SoC: discharge disabled
#2 BatteryLife is active
#3 Charging disabled by BMS
#4 Discharging disabled by BMS
#5 Slow charge in progress (part of BatteryLife, see above)
#6 User configured a charge limit of zero
#7 User configured a discharge limit of zero
• Note: When DC-coupled PV feed-in excess is enabled with ESS, the DVCC system will not apply the DVCC charge current
limit from PV to battery. This behaviour is necessary to allow the export. Charge voltage limits will still apply.
Charge current limits set at the individual solar charger device settings level will also still apply.
• When the BMS is disconnected in an ESS system, solar chargers will stop and show error #67 – No BMS (see the MPPT Solar
Charger Error Codes for additional info).
Color Control GX Manual
Page 65
DVCC - Distributed Voltage and Current
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