Need to connect 2x SolaX gen.2 chargers to your SolaX inverter?

The new SolaX gen.2 chargers support data interconnection between each other to share information about the transfer point.

A prerequisite for this parallel mode is to have the same power variants as well as FW version 1.12 and above.

Wiring diagram:

1. Connection variant directly to the inverter

The data chargers are connected via the green terminal strip located on the bottom of the charger near the power contacts as follows: from the primary charger (which is connected to the inverter) port RS 485-2 A + RS485-2 B to the secondary charger port RS 485-1 A + RS485-1 B. The primary charger is connected to the inverter either via RJ45 port or via RS 485-1 A + RS 485-1 B. The wiring diagram looks like this:

2. Connection variant with CT

Také lze připojit k nabíječce její vlastní měření a řídit dle primární nabíječky i tu sekundární. Na primární nabíječku se připojí vlastní měření buď do RJ 45 (pro CT nebo elektroměr) případně na RS485-1 elektroměr.  Nabíječky mezi sebou se propojí následovně: z primární RS 485-2 A + RS485-2 B na sekundární nabíječku na port RS 485-1 A + RS485-1 B. The wiring diagram looks like this:

Setup:

The setup is done only on the primary charger as follows:

Parallel function – ENABLE

Power ratio: 1:1 (Note: This is used to divide the power if both chargers are running at the same time and the mains capacity is exhausted.)

"The functionality of the two chargers in parallel mode is as follows: The secondary charger copies the set mode of the primary charger."

SolaX_X1-X3-EVC-system-matching-instructions (EN)

Equipment:

• Diesel generator set with the same or higher output as the installation (KRAFTWELE KW9800 3F ATS)
• ATS control
• CT
• Smart meter (Chint DTSU666/CT)
• WARNING! ULTRA inverters require a right-hand phase sequence, Hybrid G4 does not require this

Control Methods:

1. Using ATS only - currently only for Hybrid G4!!

In this case the inverter does not communicate directly with the genset, but the ATS of the genset monitors the voltage on the GRID side. The moment there is a voltage failure on the selected phase of the AC grid, the ATS starts the aggregate.

• On the grid side, a smart meter (direct metering/direct metering) is required The communication address of this meter must be "2".
• CT coils are required to protect the generator against backflow. (CTs use an analog signal which is faster than the digital signal used in the smart meter.

ATS wiring only:

The wiring procedure in the manual must be followed. Here is an example for our tested KRAFTWELE KW9800 3F ATS.

The inverter is connected from the Grid terminals to the ATS to the OUTPUT terminals. The distribution grid is connected to the House Net terminals and the output of the diesel generator set is connected to the Generator terminals. The SMART METER is connected between the distribution network and the ATS.

Between the ATS and the GRID terminals of the inverter, the CT coils are connected towards the GENERATOR! These coils are typically placed just after the ATS so that the coils sense the consumption at the point of installation that is connected after these coils, it is very important that the arrows of the coils point towards the distribution network, failure to do so can lead to the destruction of the diesel-generator.

On the ATS box there is a button with the AUTO / MANUAL option

• When using the ATS function, the button is in the AUTO position
• When using the DRY CONTACT function, the button is in the MANUAL position

ATS setting only:

• MaxChargePower - Maximum battery charging power (0~30000, 5000W default)

• Char&Disc Period - Same function as in inverter charging time setting

• Charge from Gen → Charge battery to - How much SOC battery to be charged from generator (10~100, 10% default)
• Charge from Gen → Charge battery to

2. Using Dry Contact Hybrid G4/Ultra

The inverter is directly connected via DO contact (COM port pin: 7,8 for Hybrid G4 or DIO port pin 1+2 for Ultra) to the ATS and gives a signal when the ATS should start the generator.

• On the network side a smart meter (direct/indirect measurement) is required and the communication address must be "2".
• CT coils are required to protect the generator against backflow. (CTs use an analog signal that is faster than the digital signal used in the smart meter.
• From the COM port on the inverter (pin 7,8) or the DIO port (pin 1+2) for the Ultra, route the signal to the ATS switch (Auto/manual button) where a connection needs to be made so that the ATS can be controlled by the inverter.

DRY CONTACT wiring (Hybrid G4):

DRY CONTACT (Ultra) wiring:

Uses Pin 1+2 from the DIO terminal block.

Connecting DRY CONTACT to the logic of a diesel generator e.g. KRAFTWELE KW9800 3F ATS

DRY CONTACT setting (Hybrid G4/Ultra):

• MaxChargePower - Maximum battery charging power (0~30000, 5000W default)
• Char&Disc Period - Same function as in inverter charging time setting
• Charge from Gen → Charge battery to - How much SOC battery to be charged from generator (10~100, 10% default)
• Charge from Gen → Charge battery to
• External Gen = Immediately - Immediate start of generator when mains voltage changes
• Charge from Gen→Charge battery to - How much SOC battery to be charged from generator (10~100, 10% default)
• MinRestTime - Minimum time between generator starts
• HoldGenMinPower (hybrid G4 only) - Minimum generator power

CT/Meter setting (Hybrid G4/Ultra): (applies to both ATS and Dry Contact)

NAV_SOLAX_Remote_shutdown_solution (EN)

Newly added to the SolaX hybrid G4 inverter is a function for modifying the logic of emergency disconnection of the inverter from the grid known as the SHUT DOWN function or 0/100% regulation. There are now 3 modes to choose from:

1. Battery and inverter power disconnect function

When the potential free connection of pin 1+2 on the COM port is made, the battery / BMS master contactor will be disconnected, thus disconnecting the battery system from the inverter and also forcefully disconnecting the inverter from the distribution network.

Setup as follows: advanced menu - shut down - function control - use COM

Wiring:

2. The function of forcefully disconnecting the inverter from the grid, keeping the battery charged

This function is located on the SHUT port of the inverter and pin 4+6, when these pins are connected potential-free, the inverter is forcefully disconnected from the distribution network, but the battery charging function is maintained.

Settings: advanced menu - shut down - wait charge mode - Enable

Wiring:

3. Inverter power disconnect function from the mains, no battery usage

This function does not need to be set in any way in the inverter, and is active by default on the SHUT port and pin 4+6 in a potential-free connection. When this function is activated, the inverter is forcefully disconnected from the distribution network and also does not charge the battery.

Wiring:

This operating mode optimizes the operation of your PV plant based on your predefined scenarios at defined time periods.

TOU allows users to set the behaviour of the PV plant according to different scenarios in defined time periods such as weekends, weekdays, holidays, thus making the operation of your inverter more efficient.

Currently, the following inverters are supported to set the TOU operating mode:

• X1-Hybrid G4
• X3-Hybrid G4
• X3-Ultra

The above inverters must contain the latest FW of both the inverter and the communication module.

Mode settings

SolaX cloud:

We have two ways to find out the currently installed version in a SolaX 4th generation hybrid inverter:

• Directly from the display in the inverter menu and the About section , then select Internal code:

The first double digit (27) shows us the DSP version in our case 1.27 and the last double digit (26) the ARM version in this case 1.26.

• By locally connecting the SolaX cloud application on the mobile device:

Procedure:

1. On the mobile device, connect to the inverter's broadcast wifi network, which has the form "wifi_Sxxxxxxx".

2. Open the SolaX Cloud app and connect locally.

3. Scan/fill in the registration code of your wi-fi dongle:

4. Select the "Data" icon on the bottom right and then about, then you will see the DSP and ARM versions:

Newly implemented in the Solax Hybrid G4 inverter is the Pgrid Bias function, which was specially developed for the Czech market depending on the type of PP contract and the preferences of the PV owner.

• Pgrid Bias = DISABLE – the inverter regulates to the precisely set value.

Example: Export Control = 0 W and Pgrid Bias = DISABLE. In this combination of settings, the inverter will regulate to 0 W, but it may happen that in the event of a sudden request to cover a large amount of energy - for example, switching on the heating spiral, the inverter will take energy from the grid for a few moments before fully covering this load. Analogously, it also applies in the opposite case, when switching on this high load, the inverter can send a small amount of energy to DS before it downregulates to 0 W.

Conclusion: This setting is suitable for customers who are allowed to flow into the grid and are willing to accept occasional consumption from the grid due to fast switching of heavy loads if they have set Export Control = 0 W. In other cases where Export Control = any positive value should Pgrid Bias also be set to DISABLE.

• Pgrid Bias = INV – the inverter still draws approx. 40 W from the grid

Example: Export Control = 0 W and Pgrid Bias = INV. In this combination of settings, the inverter will still draw (consume) energy from the network of approx. 40 W so that in the event of a sudden disconnection of a high load, it eliminates the sending of energy to the DS, as the inverter creates a so-called reserve for this possible overflow with this drawing.

Conclusion: This setting is suitable for customers who do not have any network overflow allowed. This setting works more efficiently using original measuring current transformers.

• Pgrid Bias = GRID – the inverter still sends approx. 40 W to the grid

Example: Export Control = 0 W and Pgrid Bias = GRID. In this combination of settings, the inverter will still send approx. 40 W to the network, so that in the event of a sudden switch-on of a high load, e.g. a heating spiral, there will be no short energy withdrawal from the DS before the inverter fully covers this load.

Conclusion: This setting is suitable for customers who, although supply to the grid is allowed, but want to set Export Control = 0 W and at the same time do not want the inverter to take energy from the DS for a short time in the event of a sudden switching on of a high load.

Download >>  NAV_MODBUS_SOLAX_G4 (EN)

Download >>  NAV_CHINT_SOLAX_G4

After connecting your black 3.0 wifi dongle, does the message "Aging mode" appear on the inverter and the inverter does not work? We know the solution!
Please restart the whole system so that the inverter goes to normal mode. (disconnecting the inverter from the distribution network, switching the DC switch to the OFF position, turning off the main circuit breaker on the batteries)
After rebooting the entire system, upload the latest FW to your chosen black 3.0 wifi module.

You can find the procedure below:

1. Download latest firmware for black wifi dongle here >>
2. Unzip the downloaded file
3. Connect your laptop to the broadcast wifi signal with a dongle ("wifi_Sxxxxxxxxx")
4. Open the browser and enter the IP address 5.8.8.8 if the wifi dongle does not respond then 192.168.10.10
5. Enter login information: username: admin, Password: dongle registration number (Sxxxxxxxxx), for older models admin
6. In the System tab, press the "choose file" button and select the downloaded and unzipped file from step 2

7. Press the start button

After uploading the latest wifi dongle firmware, the inverter will go into normal working mode.

External ATS function

If you want to have the EPS output of the inverter always under voltage, please set the External ATS function to Disable in the Advanced menu.

Do you own a SolaX inverter and are unsure which Dongle for communication is compatible with it? We have a solution for you!

Remove the protective cap from the Dongle connector and check the shape.

1) If you find a recess with a USB port, then the type of WHITE Dongle Pocket WiFi 2.0 - order code (B-210-1000) is suitable for you.

2) If you find a black plastic extension with a USB port, the BLACK type Donglu Pocket WiFi 3.0 is suitable for you - order code (B-210-1014)

Determination by product code for X3-Hybrid G4