Power island with the power station KS 5200PS

Do you have no access to the public power grid, or have you considered becoming independent of the public power grid?

This is possible with the KS 5200PS solar power station!

The KS 5200PS solar power station can operate with just 4-6 solar modules (depending on the output voltage) and supply up to 5200W of power to your devices. The output voltage of the solar array under load should not fall below 150V. The maximum voltage of the solar array is 450V at idle and 430V under load. The built-in MPPT charge controller can convert up to 5kW. The solar energy is stored in the solar power station's LiFePo4 battery and used to power your 230V devices.

The KS 5200PS is designed for stationary use as a TN system. The output neutral conductor is connected to PE in off-grid mode to ensure that the house's power supply is in the TN system with the grounded neutral conductor and that the protection (RCD and CB) in the distribution system functions properly.

Operation without grounding is prohibited.

Recommended wiring diagram without the utility grid connection:

In periods of low sunlight or if the solar power station needs to be shut down for any reason, an additional power source such as a backup generator and a transfer switch is required.

KS 8100iEG:

KS 5500iEG S:

Only inverter generators that deliver a "pure" 230V 50Hz sine wave and are suitable for sensitive power consumers may be used as emergency power generators.

Most emergency power generators are built as IT systems with insulated active wires. The generator neutral conductor must be grounded behind the power inlet (see the wiring diagram).

Internal relays of the KS 5200PS connect the external AC power source on both wires (L and N) while it is being used as a power source. Internal relays disconnect the external AC power source on both wires (L and N) while the power station switches to off-grid mode.

The service switch transfers power consumers directly to the generator if the KS 5200PS needs to be shut down for service purposes.

The emergency power generator should have enough power to simultaneously supply the power consumers connected to the KS 5200PS output and charge the power station's battery. The KS 5200PS battery charging current from the external AC power source is factory set to 30A, which corresponds to a charging power of approximately 1700W, but can be adjusted if necessary:

Recommended wiring diagram with inverter generators that have extra contacts for external start/stop control:

The circuit diagram applies to inverter generators that are started by closing the control contacts and stopped by opening them. The control cable is connected to the potential-free C and NO contacts on the power station.

Batteries in generators with contacts for external control usually require maintenance voltage, and the socket shown in the wiring diagram is used to connect an external charger, which is usually included with such a generator. Without maintenance voltage, the battery will slowly discharge and can even fail. This is especially important for inverter generators, which have smaller batteries that must power the generator's electronics in standby mode.

When using generators that do not require maintenance voltage, we still recommend recharging the battery every 1-3 months if the generator is only used infrequently.

It is also recommended, depending on the generator design, to run the generator for a test run every 1-3 months to flush the fuel system. The expiration date of the fuel must be strictly observed.

When using generators with ATSs, which monitor the 230V power supply and start it when it fails, you can use the NC and C control contacts, which only close when the "Battery Stop Charging Voltage" is reached and only open when the battery voltage drops to the "Battery Stop Discharging Voltage" level.

Recommended wiring diagram with the KS 6000iES ATS Version 2 inverter generator:

The generator's ATS module monitors the 230V voltage at its MAINS INPUT in automatic mode, starts the generator as soon as this voltage fails, and stops it within approximately 1 minute as soon as the 230V is restored to the MAINS INPUT.

The KS 6000iES ATS Version 2 is designed to only monitor the 230V voltage at its MAINS INPUT and not to pass it through, so that the current from the power station's output does not run in a circuit to the AC input.

Internal circuit diagram of the KS 6000iES ATS version 2 inverter generator:

The CEE 230V 32A socket is connected to the output of the inverter module and is only active when the generator is running.

The side multifunction rotary switch (fuel tap, ignition, control power supply) is used to manually turn the generator on (RUN position) or off (OFF position). The red button on the multifunction switch starts the generator in manual mode.

The ATS switch turns automatic mode on (ATS SWITCH ON) or off (ATS SWITCH OFF).

The 230 V voltage from the KS 5200PS output is routed to the generator's MAINS INPUT via an RCBO (overload and residual current device) and NC and C contacts. These close when the battery voltage reaches the "Battery stop charging voltage" value and open when the battery voltage drops to the "Battery stop discharging voltage." Thus, the generator begins charging the battery immediately after the KS 5200PS is switched on and shuts down one minute later, when the battery voltage reaches the "Battery stop charging voltage."

The cable to the control contacts and to the Schuko socket is protected by an overload and contact protection (RCBO). The phase conductor from the AC output of the KS 5200PS goes to the Schuko socket and from there to the generator's MAINS INPUT. The neutral wire goes to the control contact C and from the control contact NC comes back to the Schuko socket and from there to the MAINS INPUT of the generator.

The latest version of the KS 5200PS solar power station has DC connections where you can connect the KS 48V-DC DC generator (50-55V version) as an additional power source:

The KS 48V-DC works like a charger or a charging module with an IU characteristic:

The KS 48V-DC DC generator offers significant advantages in that it can monitor the battery voltage of the KS 5200PS in AUTO mode, starts as soon as the battery voltage drops below 50V, and is capable of charging the battery with up to 60A, which corresponds to a solar array of approximately 3.3 kWp. The KS 48V-DC stops within approximately 30 seconds after the voltage at its DC output reaches 54.5-55V and the current drops below 20A.

Additional batteries with the same parameters as the internally installed LiFePo4 with a nominal voltage of 51.2V from Könner & Söhnen can also be connected to the DC input. Parallel connection of the external battery with the internal battery is only possible if the charge level of the two batteries does not differ by more than 20%. If the charge level differs by more than 20%, only one battery should be used (just switch on the corresponding DC safety switch). If both batteries are to be charged, the battery with the lower charge level must be activated first. If the load is to be supplied, the battery with the higher charge level must be activated. This is necessary to avoid excessive overflow currents between the two batteries. Excessive current can trigger the battery BMS's overcurrent protection. Built-in DC circuit breakers are less sensitive than the BMS's electronic protection.

No DC power consumers or external power supplies may be connected to the DC input! We assume no liability for defects or consequential damage resulting from connecting batteries, charging controllers, or other devices from third-party manufacturers.

To connect additional solar fields to the solar power station (e.g., you want to install a pair of solar panels on another side of the roof and connect them to the KS 5200PS), you must use an external charge controller, which can be connected directly to the DC connections for external DC power sources. These connections supply power to the 48V power rail (KS 5200PS) with a permissible voltage range of 48-56.8V. The DC connections of the KS 5200PS are protected by DC circuit breakers.

Einstellungen der Solar-Powerstation KS 5200PS

Der Zugriff zu den Einstellungen der Powerstation KS 5200PS  ist mit Hilfe der Software SolarPowerMonitor über den externen Computer möglich.

Laden Sie die Software Solar Power Monitor unter dem vom Hersteller zur Verfügung gestellten Link herunter. Nach dem Entpacken sind 4 Dateien zu finden:

First you have to install the first 2 files so that the drivers necessary for communication via USB are installed. The SolarPowerMonitor program is installed in the second step.

The power station is connected to the computer's USB port using the cable provided. The USB Type A end of the cable goes into the computer and the USB Type B end goes into the USB port of the power station.

After starting, SolarPowerMonitor searches for connected power stations.

As soon as the connected power station is found, a window with the current status of the power station appears. To get full access to the settings, you have to log in with the password "admin":

Access to the inverter settings is now available:

KS 5200PS default settings:

The default operating mode is SUB. In this mode, the power station's internal battery is only charged from the external AC power source up to the "Battery Stop Charging Voltage," which is approximately 60-70%. In this mode, the battery can be charged up to 100% using the PV input only.

Settings for the KS 5200PS in a power island:

An emergency generator is used as the external power source in a power island.

Since the KS 5200PS is intended to be charged by the external AC generator, we recommend switching the operating mode to UTI, in which the battery can be charged up to 100% from the external AC power source.

Since the power station can be charged to 100% in UTI mode, a warning with a beep can occur while the BMS is closing. However, this rarely happens and if you set a high charging current “Grid max charger current set”. To deactivate the beep, please activate the option “BuzzForbide(only use by PV1800)” (check the box) and confirm. To reactivate the beep, you must activate the option “GridBuzzEnable (only use by PV1800)” (check the box) and confirm.

When using the generator in automatic mode, we recommend setting the "Battery stop charging voltage" parameter to 54V so that the generator can charge the battery up to 80%. To ensure the battery is charged within 3-4 hours (which corresponds to the recommended runtime of most emergency generators) and a 5 kW inverter generator, for example, still has enough power for household electrical consumers, we recommend setting the battery charging current from the external power source to 30A. We recommend setting the "Battery stop discharging voltage" value to 50V so that the generator does not start too early, but only when the battery's SOC reaches approximately 15-20%.

When using the DC generator, all of these settings are irrelevant, as the KS 48V-DC supplies power directly to the power station's 48V power rail, which supplies the inverter module and also charges internal and external batteries, which are also connected to the 48V power rail via circuit breakers on the rear of the power station.

If the KS 48V-DC is not used in AUTO mode but in EXTERNAL CONTROL mode, the desired "Battery stop charging voltage" and "Battery stop discharging voltage" values must be set, and the EXTERNAL CONTROL contacts must be connected to the corresponding C and NO contacts on the power station.

If you have any further questions or concerns, please contact Könner&Söhnen technical support by email at support@dimaxgroup.de

Disclaimer:

These instructions can only be perceived as a recommendation, are descriptive and must be adapted to the exact circumstances and conditions on site during installation. The installation itself should be carried out in compliance with all standards and regulations. We assume no responsibility for incorrect installations and their consequences.