Kohler 36VDC, 6VSG, 24VDC, 48VDC Genset System Menu, System Parameters for Battery Bank Charging

3.14 Genset System Menu

The genset system menu displays the system information shown in Figure 3-19.Generator sets are factory-set and should not require changes to the system settings in the field.

A Kohler-authorized distributor or dealer can adjust these settings, if necessary. If the generator set is reconnected to a different voltage or the system settings require adjustment for some other reason, see Section 3.5 for instructions to enable editing and change the system settings.

Note: Use caution when navigating the controller menus. In some menus, pressing the Select button can enable editing of the controller settings. Changing the settings to incorrect values can adversely affect generator set operation or render the unit inoperable.

3.14.1System Parameters for Battery Bank Charging

The following system parameters can be viewed in the Genset System menu on the user interface on the generator set’s VSC controller.

•System Voltage

•Auto Start Voltage

•Auto Stop Load (%)

•Load Limit

Note: Changing these settings can damage your generator set and batteries. Always refer to the information provided by the battery bank manufacturer for the correct voltage and charge current limits for your batteries. Contact an authorized Kohler distributor or dealer for assistance if the default settings are not appropriate for the battery bank.

System Voltage: The system voltage is the output voltage of the generator set. Default values are shown in Figure 3-15.The system voltage is set to the required output voltage to properly support the load and charge the battery. Do not confuse this value with the voltage designation of the battery stack. For example, four 12V batteries in series results in a 48V battery stack, but the output voltage needed to charge the battery stack is 54V.

Nominal Voltage	24V	36V	48V
Default System Voltage, VDC	27	40.5	54

Figure 3-15System Voltage Default Settings

Refer to the battery manufacturer’s documentation for the recommended charging voltage. If the system voltage needs to be changed, contact an authorized Kohler distributor or dealer.

Note: Setting the system voltage to a higher value than the factory default setting will decrease the power output of the generator set.

A 6VSG set at the system voltage shown in Figure 3-15will have an output of 6 kW. If the system voltage is set to a higher value, the output current decreases. The available power output also decreases below 6 kW due to the limits on the engine speed. The graphs in Figure 3-17illustrate the effect of changing the system voltage.

Auto Start Volt: The 6VSG will automatically start when the battery bank voltage has reached or fallen below this value for 180 seconds (3 minutes). Default settings are shown in Figure 3-16.

Nominal Voltage	24V	36V	48V
Default Auto Start Voltage, VDC	25	37.5	50

Figure 3-16Auto Start Voltage

Note: The 3-minute (180-second) time delay can be changed using a personal computer (laptop) and Kohler® SiteTech™ software. Contact a Kohler authorized distributor or dealer to adjust the delay setting, if necessary.

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