This guide explains how to set up a NUT (Network UPS Tools) server to integrate a Green Cell UPS with a Synology NAS. To ensure smooth communication between the Synology and the NUT server, it's crucial that the server is named "ups" in the configuration.
- A Synology NAS
- A compatible Green Cell UPS
- A server (physical or virtual) on which NUT can be installed and configured
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NUT Installation: Ensure NUT is installed on your server. The installation process varies depending on the operating system. 
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Configure the NUT Server: Open the main configuration file of NUT (often named ups.conf) in your preferred text editor.
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Add the following configuration for your Green Cell UPS: [ups] driver = blazer_usb port = auto desc = "PROXONE UPS" default.battery.voltage.low = 10 default.battery.voltage.high = 14 langid_fix = 0x409 - [ups]: It’s critical to name this section- ups, as that’s the name Synology will look for when attempting to connect.
- driver: Use- blazer_usbfor Green Cell UPS.
- port: Set to- autofor automatic USB port detection.
- desc: A description to identify the UPS. This can be customized.
- default.battery.voltage.lowand- high: Voltage thresholds for the battery. Adjust according to your UPS model.
- langid_fix: A fix for language issues, if necessary.
 
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Save and close the file. 
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Log in to DSM (DiskStation Manager) on your Synology. 
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Navigate to Control Panel > Hardware & Power > UPS. 
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Check the Enable UPS support option. 
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Select Network UPS as the connection type. 
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In the Network UPS network server field, ensure to enter upsserver IP.
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Click Apply to save changes. 
To verify that your Synology is properly connected to the UPS via the NUT server:
- Check the logs on your NUT server for incoming connections.
- On the Synology, you should see the UPS status in Control Panel > Hardware & Power > UPS.