---
name: "riello_ser"
section: "8"
platform: "linux"
package: "nut"
version: "2.8.5-2"
release: "Arch Linux 2026-11-01"
platforms: ["linux"]
url: "https://new.carta.tech/riello_ser"
---

# riello\_ser(8)

Driver for Riello UPS Protocol UPS equipment via serial port connections

## NAME

riello\_ser - Driver for Riello UPS Protocol UPS equipment via serial port connections

## SYNOPSIS

**riello\_ser** -h

**riello\_ser** -a *UPS\_NAME* \[*OPTIONS*\]

**Note**\

This man page only documents the hardware-specific features of the riello\_ser driver. For information about the core driver, see [**nutupsdrv**(8)](/nutupsdrv/8.md).

## SUPPORTED HARDWARE

riello\_ser supports all recent Riello UPS, Aros UPS models which use the Riello UPS GPSER and SENTR protocols.

Older Riello UPS products are not supported.

## EXTRA ARGUMENTS

You may need to tweak some settings, depending on the make and model of your UPS (see [**ups.conf**(5)](/ups.conf/5.md)):

**localcalculation**

When enabled, driver will calculate values of battery.runtime and battery.charge "locally" in the driver. This is for some Riello models which provide incorrect values in hardware readings, or none at all. This "local calculation" is done according to nominal battery capacity, nominal battery voltage, actual battery charge, maximum and actual UPS load.

You may want to also configure *default.battery.voltage.low* and *default.battery.voltage.high* in case the built-in default range (from 10.7V to 12.9V) does not match your hardware, or give a shot to *default.battery.voltage.nominal* (e.g. *24*) if your device does not serve that either.

**Note**\
 Lead (PbAc) battery charge graph is not linear, so guesstimated charge value may not be perfectly accurate. However it should be good enough to determine battery actual status and roughly estimate the time it can still power the system.

**Warning**\
 This keyword may be deprecated in future releases of the driver, in favor of runtimecal and other settings which it requires (as seen in [**nutdrv\_qx**(8)](/nutdrv_qx/8.md), [**blazer\_ser**(8)](/blazer_ser/8.md) and [**blazer\_usb**(8)](/blazer_usb/8.md) drivers).

## AUTHOR

Massimo Zampieri

## SEE ALSO

### Related drivers

[**riello\_usb**(8)](/riello_usb/8.md)

### The core driver

[**nutupsdrv**(8)](/nutupsdrv/8.md)

### Internet resources

The NUT (Network UPS Tools) home page: https://www.networkupstools.org/historic/v2.8.5/