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On-line double conversion UPS from 4 to 20 kVA

Enhanced protection for mid-range systems with single-phase power supply

SALICRU’s SLC TWIN PRO2 series UPS systems feature on-line double conversion technology, currently the most advanced for the protection of critical systems as it provides a fully stabilised and filtered sinusoidal supply voltage. The systems come in a tower format and are available in power ratings of 4, 5, 6, 8, 10, 15 and 20 kVA.


The SALICRU SLC TWIN PRO2’s output voltage is always single-phase, featuring a single-phase input of 4 to 20 kVA and a three-phase input of 8 to 20 kVA. All devices with single-phase input provide a unitary output power factor (1), the most optimum for systems and environments with high energy needs. Adaptability is another important feature thanks to the numerous operating modes available: On-line, Batteries, Eco-mode, Bypass, Frequency converter and Parallel redundant.


The possibilities of control and monitoring are varied: on the one hand, an LCD display + keypad for local operation of the device, and, on the other, various communication options (USB HID and RS-232 interfaces, and slot for SNMP, RS-485 and AS-400 cards) that enable the UPS to be integrated into standard or virtualised platforms for management, incident notification and remote maintenance.

(1) Except 15 and 20 kVA I / I models

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SALICRU’s SLC TWIN PRO2 series is the best option for providing a secure power supply to ERP systems, Business Intelligence, CRM solutions, intranets/extranets and corporate networks in the event of a wide range of possible disturbances (micro power outages, voltage fluctuations, frequency variations, harmonics, transients, etc.), which can cause irreparable damage or incur high costs in all of these critical systems.

SLC TWIN PRO2 4-20K - SALICRU Application


  • On-line double conversion and DSP control technology.
  • Output power factor PF=1.(1)
  • Compact tower format for space saving.
  • Active power factor corrector for all input phases.
  • Multiple operating modes for better adaptability.
  • Equipped for parallel operation as standard, up to 3 devices.
  • USB and RS-232 interface for all models as standard.
  • Monitoring software for Windows, Linux, Unix and Mac (downloadable).
  • Intelligent slot for SNMP/RS-485/optocoupler cards.
  • Eco-mode operation for increased efficiency.
  • Backup extensions available for all power ratings.
  • Frequency conversion function.
  • EPO – emergency power off.
  • Manual and/or automatic programmable battery test.
  • SLC Greenergy solution.

(1) PF=0.9 for devices with (mono-phase input 15 and 20 kVA I/I, three-phase input SLC TWIN/3 PRO2 models)


On-line double-conversion

Double voltage conversion (AC/DC + DC/AC), providing the best degree of safety to loads.

On-line double-conversion


In the event of power failure, the loads continue to be powered by means of batteries.



In the event of any eventuality (incident, overload, etc.), the loads continue to be powered by the input voltage.


Frequency converter

Adaptation of the output frequency to the needs of the load (50/60 Hz or 60/50 Hz).

Frequency converter


Increased efficiency up to 99%, with immediate availability of full power.


Parallel redundant

Increased safety (N+1) or capacity, with configurations of up to 3 devices.

Parallel redundant

Techinical Specifications

Technical Specifications SLC TWIN PRO2 4-20 K



Software Viewpower HTML

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UNMS II Software


For those networks which have more than one UPS to feed it and it requires a concentration monitoring from a single command post, UNMS II software (UPS Network Managament System) is the ideal solution. UNMS II allows managing multiple installations of all those units that have an Ethernet adapter SNMP / Web Adapter and / or sensors. UNMS II packages are available in 9, 25, 50 or 150 licenses.

RCCMD Software


UPS managing and monitoring in a heterogeneous IT networks, where different platforms coexist, becomes almos impossible, because the less common operating systems on the market do not have that such software.The RCCMD is an application that allows the simultaneous and secure shutdown of the 95% of existing platforms. Like the most comprehensive monitoring software, the RCCMD can send messages or commands to different clients of the network.



Monitoring, managing and alarm system for lead-acid batteries. Ensures the full operation of the battery system, preventing unexpected or unnoticed failures caused by defective batteries. System Components: WebManager, battery modules, associated bus

Ethernet/SNMP Web Adapter

Ethernet/SNMP Web Adapter - SALICRU

SNMP adapter to integrate the equipment in a IT network by using an IP address. It includes adapter, CD with programming software, configuration cable, MIB (Management Information Base) and user manual. Available in card or box formats.

Temperature and humudity sensor

Temperature and humudity sensor - SALICRU

Probe to measure the magnitude of the battery ambient temperature and humidity of the equipment

AS-400 card

AS-400 card - SALICRU

AS-400 card allows obtaining the following alarms: UPS fault, general fault low battery, UPS ON and mains failure in a dry contact way.  In the big units  AS-400 card allows a remote shutdown of the equipment and getting dry contacts of the following alarms: UPS fault, general alarm (it includes: UPS fault, mains failure, low battery, bypass active), UPS on bypass, low battery, UPS on inverter and mains failure. td> 

MODBUS Protocol


Public and industrial communication protocol that allows controlling and monitoring of the device. Communication over an RS-232 port.

RS485 Port

RS485 Port - SALICRU

It allows extending the communication functions of an equipment through a RS-485 or Ethernet connection. Format card.

Potential-free contacts

Potential-free contacts

These are potential-free relays that are used to receive an on/off signal for the automatic operation of a device.

Battery modules

Battery modules

For backup requirements greater than standard, one or several battery modules connected to the UPS can be installed.

External manual bypass

External manual bypass - SALICRU

External Manual Bypass to make maintenance tasks, by isolating the equipment electrically. Bypass type make Before break

Autotranformer for other voltages

Autotranformer for other voltages - SALICRU

It used to adapt the equipment to other different nominal voltages 3x380 / 400/415 + N V.

Isolation transformer

Isolation transformer - SALICRU

Electrical device that provides galvanic isolation between input and output, and adjust tension.

ATS - Automatic transfer system (up to 6 kVA)

ATS - Automatic transfer system (up to 6 kVA)

Automatic switch between two single-phase AC power lines which, starting from two sine-wave current power lines, supplies output voltage to the load(s). The switching can be automatic or manual.

  • SLC-4000-TWIN PRO2
    4000 VA
  • SLC-5000-TWIN PRO2
    5000 VA
  • SLC-6000-TWIN PRO2
    6000 VA
  • SLC-8000-TWIN PRO2
    8000 VA
  • SLC-8000-TWIN/3 PRO2
    8000 VA
  • SLC-10000-TWIN PRO2
    10000 VA
  • SLC-10000-TWIN/3 PRO2
    10000 VA
  • SLC-15000-TWIN PRO2
    15000 VA
  • SLC-15000-TWIN/3 PRO2
    15000 VA
  • SLC-20000-TWIN PRO2
    20000 VA
  • SLC-20000-TWIN/3 PRO2
    20000 VA