Note: make sure to always update all components to the latest software when making a new installation.
Hub-4 is a Grid-parallel Energy Storage system, using the Multi or Quattro bidirectional inverter/charger as its main component. It optimizes self-consumption: at times when there is excess PV power, the 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.
|PMP, CMP or QUA||Multi or Quattro inverter/charger (see Note 1 below)|
|REL200100000||Wired AC sensor - 1 and 3-phase - max 65A per phase|
|BPP000300100R||Color Control GX|
|ASS03006xxxx||RJ-45 UTP Cable|
|BATxxxxxx||Batteries. (Victron) Lithium batteries are recommended due to their long life|
|ASS030130010||MK2-USB. Needed during installation to configure the VE.Bus system|
|ENS Anti-islanding options, choose one of below options:|
|No external needed||For certain countries, our Multis and Quattros have built-in certified anti-islanding protection.|
|RCD000100200||Anti-islanding box 63A single phase - UK (includes the UFR1001E)|
|RCD000300200||Anti-islanding box 63A single and three phase (includes the UFR1001E)|
|REL100100000||Ziehl anti-islanding relay UFD1001E (Many countries) more info|
|REL100200000||Ziehl anti-islanding relay SPI1021 (Italy)|
|Wired AC sensor connection option A: wireless connection between the CCGX and the AC sensor|
|ASS300400100||Zigbee to RS485 converter (AC Power adapter and 30cm wire to AC sensor is included)|
|ASS300400200||Zigbee to USB converter (USB cable is included, connects to the CCGX)|
|Wired AC sensor connection option B: wired connection between the CCGX and the AC sensor|
|ASS030570018||RS485 to USB interface 1.8m|
|ASS030570050||RS485 to USB interface 5m|
There are several factors to take into account when dimensioning the battery:
Because it is installed parallel to the grid and the loads, the inverter size can be reduced to (much) smaller than the max expected nominal and peak load.
For example, to cover the base load of a two person house hold, the MultiPlus xx/800 might already be sufficient. For a household with one family, the MultiPlus xx/3000 can already manage nearly all appliances, when not more than one of them is running at the same time. This means a MultiPlus xx/3000 can already reduce the power consumption during late spring, summer days and early autumn with sufficient storage to (nearly) zero.
In a Hub-4 installation, the PV Inverters are connected in parallel to the inverter/charger. Because of this, the size of the PV array and the PV inverter is not limited by the maximum nominal power of the inverter/charger. This is in contrast to other AC-Coupled installations, such as Hub-2, where the Factor 1.0 rule applies.
Note that even in an Hub-4 installation, it is possible to connect AC-Coupled PV power on the output of the inverter/charger. In that case, make sure add the PV Inverter Assistant to the list of installed Assistants in VEConfigure.
Phase compensation, for a single phase inverter/charger installation, part of a multi phase system.
Phase compensation, which is common practice in Germany, is used to have a storage hub connected to only one phase, and compensate on that phase for the other two phases, thereby effectively regulating the total power of all three phases combined.
See the following example, where the Hub is connected to L1, and by compensating for phase L2 and L3 as well, it regulates the total power at the distribution panel to 0 W.
|Load||100 W||400 W||200 W||700 W|
|Inverter/charger||-700 W||0 W||0 W||-700 W|
|Distribution box||-600 W||400 W||200 W||0 W|
Enabling or disabling phase compensation is done in the Hub-4 settings on the Color Control GX. See the screenshot further down below in this manual.
In a three-phase Hub-4 system, there is at least one Multi installed on each phase. We recommend leaving phase-compensation setting to its default: enabled. The system will regulate the total power of the three phases to zero. When phase-compensation is disabled, each separate phase is regulated to 0.
With phase-compensation enabled, all the inverter/chargers will either be charging or discharging: the system prevents to charge the battery on one phase, and discharge it on the other phase.
When the system as a whole produces power (PV power exceeds consumption), the Multis on the phases with a net power production will be set to charge the battery. Multis on phases with a net power usage, Ppv < Pload, will be on idle.
When the system as a whole consumes power (Consumption exceeds PV production), the Multis on the phases with a net power usage will discharge the battery to compensate for the shortage. Multis on phases with a net power production will be on idle.
In a hub-4 system it is still possible to balance the grid power of each phase to 0W. Disable phase compensation. This would however cause significant losses, because power will flow from one phase to another through the DC connections. Causing losses when converting from AC to DC on one phase and then from DC to AC and the other phase.
Phase compensation, balancing the total grid power to 0 is therefore more efficient. It avoids the AC-DC roundtrip losses.
In a multi-phase system, the charge current is configured per phase. There is not a total charge current which the system adheres too. This means that, for example when there is a relatively small battery bank, and a huge over production of PV on L1, and not on the other phases, only part of that over production on L1 will be used to charge the battery.
A Hub-4 setup requires an AC sensor connected in the main distribution panel: between the grid and installation. This AC sensor has been designed for 3 phase measurement, but can be configured for single phase support as well.
Note the jumper between terminals 1 and 4. You do not need this connection if you have the version AV2 of the sensor.
Change the front selector of the AC sensor so it is not in the locked state. This will allow the CCGX to automatically configure the meter. The front selector is located next to the display as indicated in the image below.
1. Connect the Zigbee to USB converter to the CCGX using the supplied USB cable. A few seconds after connecting, the active LED should be on and the TX/RX LED should be blinking (the converter takes its power from the CCGX, so the CCGX needs to be switched on as well).
2. Connect the Zigbee to RS485 converter to the EM24 energy meter:
3. Make sure only one Zigbee device is powered up right now: the Zigbee to USB converter connected to the CCGX. Power down all others. If you don't do this, the Zigbee to RS485 converter may be connected permanently to another Zigbee device.
4. Connect the 12V DC power supply to the Zigbee to RS485 converter. When the power is switched on, check the LEDs again.
Connect the meter to the CCGX using the USB to RS485 converter cable:
|RS485 Converter||Grid meter|
The Red, Green and Brown wire are not used
Follow the instructions as per the standard installation manual that comes with the inverter/charger.
Notes with regards to the Input current limit and PowerAssist:
(Note: All absolute voltages mentioned in the text below are for a 12V system and should be multiplied by 2 or 4 for a 24V or 48V system.)
When there is less PV power available than needed by the loads (a PV shortage, at night for example), energy stored in the battery will be used to power the loads. This continues until the battery is considered empty. There are three parameters that check if the battery is empty:
What about the Sustain mode?
The Sustain voltages do not effect when the system stops discharging the battery: Sustain is activated only after the battery has been flagged as empty. See Sustain section below for more information.
What happens during a mains outage?
Configuring minimum state of charge in the Assistant or on the CCGX?
It is possible to set the minimum state of charge in the Hub-4 Assistant itself, but this is not recommended and we'll remove that option in the near future. Use the same setting in the Color Control GX instead.
The Hub-4 Assistant includes Dynamic Cut-off. This feature makes the DC-input low shut-down level a function of the battery current drawn from the battery. When a high current is being drawn from the battery, a lower shut-down voltage threshold is being used. For example 10 V. And similarly, when the battery is only being discharged slowly, a high DC cut-off voltage is used, for example 11.5 V.
This way, voltage drop caused by the internal resistance in the battery is compensated. Making battery voltage a much more reliable parameter to stop discharging when a battery is empty.
The picture below shows the default 'Discharge' vs. 'DC input low shut-down voltage' curves for the different battery types. The curve can be adjusted in the assistant.
The purpose of the Sustain Mode is to prevent battery damage caused by leaving batteries in a deeply discharged state. The Sustain Mode is entered after the battery has been discharged, see above.
During Sustain Mode, the batteries will slowly be charged from the grid; maximum charge current is 5 Ampére. The Sustain level is 12.5V for lithium batteries. For non-lithium batteries, the sustain level is 11.5 V for the first 24 hours, and after that it is raised to 12.5 V.
Excess solar power will also be used to charge the batteries. Sustain stops as soon as there has been sufficient excess solar power available to raise the battery voltage 0.1 V above the sustain level. Normal operation will then continue: solar deficits are complemented with power from the battery again.
The battery life feature prevents low battery state of charge over a long period. For example in winter, when there is insufficient PV power available to recharge the battery every day.
BatteryLife ensures that, on average, the battery will be recharged to 100% SOC, every day.
It has several advantages:
To do this we introduce a dynamic lower limit on the state of charge. Discharging is allowed only if the state of charge exceeds the limit. The limit is adjusted every day. On days with little or no surplus PV power the limit will be raised. And on 'good' days the limit is lowered again.
The limit indicates how much surplus PV power we expect during the day; a low limit means we expect a lot of PV power available to charge the battery. Ensuring that the system will not discharge more energy at night than it is expected to charge the next day.
This graphs shows a system in the spring, battery state of charge graphed over time. During the week progressing, more solar energy is becoming available, and you see the depth of discharge being increased. The red line shows how this system would operate without BatteryLife.
For further configuration of the Color Control GX, see its manual.
Instead of used for the Hub-4 regulation, the same three phase meter can be configured to measure output of a PV Inverter. Make sure to check Paragraph 1.3 in the Color Control GX Manual for other options of measuring PV Inverter output.
Installation is similar to the AC sensor on the grid. Terminals 1, 4 and 7 should face the PV inverter. On the CCGX change the 'Role' of the meter to 'PV inverter'. You can now also chose its 'Position'. In the case of a Hub4 setup, this must be 'Input 1'. If you want to connect a single phase PV inverter to a 3-phase system connect all 3 phases to the grid phasing terminals (3, 6 and 9). Now you can chose on which phase you want the PV inverter by connecting the L1 line of the PV inverter to terminal 1, 4 or 7.
There are 3 options to connect the extra AC sensor:
Changing the modbus address:
On a single phase setup, you can use a single AC sensor to measure both grid and PV inverter. For wiring see the diagram below.
On the CCGX go to the grid meter in the Wired AC sensor settings. Make sure 'Phase type' is set to 'Single phase' and 'PV inverter on phase 2' is enabled.
Check the connection between the AC Sensor and the CCGX.
It will switch to Bypass, and Sustain mode is still active and will prevent the battery from being discharged below, approximately, 50%. See Paragraph 6 for the details on Sustain and the Sustain Voltages.
No, but there is BatteryLife.
This message is a bug. There is no need to reset the device. This erroneous indication is solved in firmware version xxyy403.
Solved by updating to xxyy403 or higher.
Yes, Hub-4 works for systems where multiple Multis or Quattros are installed on the same phase and configured to operate in parallel.
Yes that is possible. There are two limitations:
These limitations will be eliminated by means of a software update. When this will be is unfortunately not yet clear.
Yes. Make sure to add the PV Inverter Assistant, and note that the factor 1:1 rule still applies.
Yes. It is possible to combine PV Inverters with MPPT Charge Controllers. And also making a system without PV Inverters, thus only MPPT Charge Controllers is perfectly possible.
Settings → System Setup → Battery Monitor. Note that, in an Hub-4 system, it is not necessary to enable
Synchronize VE.Bus SOC with battery.