3000VA Online Rack Mount UPS 9 Outlets, ULT-P3KRT

In stock



Capacity: 3000VA / 2880W
Topology: Online double-conversion
Waveform: Sine wave
Outlets: 9

• 0.96 power factor
• Zero transfer time from Line to Battery
• Adjustable charging current up to 8A
• Expandable runtime
• Load segment control
• 50/60Hz Frequency Converter Mode
• Emergency Power Off (EPO)
• ECO and Advanced ECO Modes

TUV logo

The UltimaPro RT series delivers reliable double-conversion online design with 0.96 power factor for energy efficiency to mission-critical loads. Zero transfer time and true sine wave offers an extraordinary battery backup system in rack mount form factor. With option to add-on external battery modules, this UPS battery runtime can be expanded as needed to meet your equipment needs with up to four add-on external battery banks.


Typical Applications
Mid-size servers
Lab equipment

Networking devices
Surveillance systems
VoIP / PBX systems

Security systems
Gaming computers
Slot machines


Main Features
(9) Battery-Backed Outlets with Surge Suppression
These outlets keep critical electronics online during a temporary blackout, adjust minor voltage fluctuations, and offer protection from power surges and voltage spikes.

If a blackout occurs or a power disruption beyond the tolerance range is detected, the UPS will switch over to battery power and supply these outlets with power. Connect mission-critical electronics to these outlets.

True Double-Conversion Online Topology
The main supply is fed directly into the UPS and charges batteries within the UPS. The battery power is then converted back to the main power to feed the protected equipment. Due to these two conversions, this UPS type is often known as a Double-Conversion UPS.

Zero Transfer Time
True online double-conversion topology for zero transfer time from Line Mode to Battery Mode in case of a power disturbance prevents malfunction of mission-critical equipment.

Pure Sine Wave Output
Best waveform for sensitive electronics. Benefits include:
• Smoother waveform
• Best for sensitive equipment
• Higher quality than a modified sine wave
• Maintains voltage at a safe level
• Motors run at their intended speed and with less heat
• Equipment runs with less noise
• IT equipment lasts longer
• Low harmonic distortion

Overload Protection
Protects the UPS from an overload. If the circuit breaker trips, unplug a few electronics before resetting the circuit breaker and turning your unit back on.

0.96 Power Factor
A high power factor rating offers efficient loading of the power supply. It maximizes energy efficiency to cut down on energy cost and energy loss by reducing the load on transformers and distribution equipment.

Emergency Power Off (EPO) Tab
Instantly shut off the UPS and prevent the UPS from supplying power in the event of an emergency.

Load Segment Control
Control grouped outlets allows better management of battery power by prioritizing mission-critical devices by manual or pre-setting. This allows mission-critical devices to have longer backup time than non-mission-critical devices.

Expandable Battery Runtime
Add up to 3 external battery banks to extend the battery runtime of your UPS.

2A to 8A Adjustable Battery Charger
Select between 2A to 8A battery charging current for faster battery recharge time depending on the number of external battery modules connected to the UPS. This is especially useful if located in an area with frequent power disturbances that would cause the UPS to run on Battery Mode frequently.

Hot Swappable Batteries
Replace batteries without shutting off the UPS to avoid downtime.

Power Management Software
Monitor and control the UPS from your computer with the included user-friendly software to automate computer shutdown, monitor battery levels, set UPS parameters, receive alerts of abnormalities, and more.

50/60Hz Frequency Converter Mode
Select 50Hz or 60Hz output frequency best suited for connected equipment. It is especially helpful when used to help regulate the speed of motorized equipment to match the frequency.

NOTE: If input frequency is 60Hz, setting the UPS output frequency to 50Hz will derate the UPS capacity by 40%.

Rack / Tower Convertible
Install the UPS in vertically or horizontally.

EMI / RFI Filter
EMI / RFI filter suppresses electromagnetic noise and radio frequency interference transmitted from AC power.

ECO and Advanced ECO Modes
Efficiency Corrective Optimizer (ECO) improves energy consumption by changing how power flows through the UPS.

ECO Mode: Improves energy efficiency of the UPS by setting the UPS to "standby." Input power will bypass voltage to output when the input voltage is within the acceptable range. Power factor correction and the inverter are still active in this mode.

Advanced ECO Mode: Improves energy efficiency of the UPS by setting the UPS to "standby." Input power will bypass voltage to output when the input voltage is within the acceptable range. Power factor correction and the inverter are not active in this mode.

Cold Start Capable
Turn on the UPS even without utility power as long as there is sufficient battery power.

Auto-Restart During AC Recovery
Once power returns to normal and the battery levels are sufficient, the UPS will automatically restart.

Off-Mode Charging
The UPS continues charging the internal batteries when powered off as long as the unit is plugged into an AC mains wall socket.

LCD Screen
See real-time status information of your UPS power conditions including the voltages, battery level, fault detected, and more.

Enable / Disable Audible Alarm
Enable or disable the audible alert for your unit.

To enable or disable the audible alarm, turn the LCD screen on first then press the button twice quickly. The UPS will beep once the alarm is enabled. The default setting for the audible alarm is enabled. If the alarm is disabled, no audible alert will be made when the UPS reaches a low battery state.

Optional Accessories (Not Included)
• Network Management Card - For remote power monitoring. See model number #SNMP-2 for compatibility with this UPS series.
• Rail Kit - For installation to rack cabinets. See model # ULT-RMKIT123 for the compatible rail kit to this UPS.
• Add-On External Battery Banks - Extend the battery runtime in the event of an extended power outage. See model # ULT-P3KRTKBB for compatibility with this UPS.

Warranty (US & Canada)
2-year equipment warranty, 2-year battery warranty, and 2-year $25,000 connected equipment warranty with product registration. See the Warranty page for additional information.

WARNING: The batteries, battery posts, terminals, and related accessories can expose you to chemicals including lead and lead compounds, which are known to the State of California to cause cancer and birth defects, or other reproductive harm. Wash hands after handling. For more information, go to www.p65warnings.ca.gov.
Capacity 3000VA / 2880W
Topology Online double-conversion
Voltage 100 / 110 / 115 / 120 / 127Vac
Voltage Range 55 - 150Vac +/- 5% at 50% load
80 - 150Vac +/- 5% at 100% load
Frequency 40 - 70Hz
Inlet NEMA L5-30P; 30A locking plug (see product image for reference)
Output Voltage 100 / 110 / 115 / 120 / 127Vac
Frequency Range (on Battery) 50 / 60 Hz +/- 1%
Output Voltage 100 / 110 / 115 / 120 / 127Vac
Current Crest Ratio 3:1 (max)
Harmonic Distortion <2% THD (linear load)
<4% THD (non-linear load)
Wave Form (on Battery) Sine wave
Outlet 8 x NEMA 5-15/20R, 1 x L5-30R
Line to Battery 0ms
Inverter to Bypass 4ms (typical)
AC Mode 91%
Battery Mode 90%
ECO Mode 96%
Chemistry Sealed lead-acid
Quantity & Size 6 x 12V / 9Ah (optional 6 x 12V / 7Ah for custom orders)
Charging Voltage 82.1 Vdc +/- 1%
Charging Current 2A - 8A (adjustable)
Recharge Time 3 hours to 95% capacity for internal batteries at 2A charging current
Emergency Power Off (EPO) Yes
Overload Protection Yes
Overcharge Protection Yes
Network / Phone / Fax Surge Suppression Yes, RJ-11/45 combo ports (1-in, 1-out)
Surge Suppression Yes
EMI / RFI Filter Yes, full time
Add-On External Battery Banks Yes, up to three battery banks (model # ULT-P3KRTBB) may be used with this model
Programmable Outlets Yes
ECO Mode Yes
Advanced ECO Mode Yes
Frequency Converter Mode Yes, however using will derate UPS capacity by 40%
USB Port Yes, for power management software to control and monitor the UPS conditions
RS232 Port Yes, for power management software to control and monitor the UPS conditions
Software Compatible with Windows 10/8/7/ Server 2012 R2 / 2008 R2 / Linux 32-Bit / 64-Bit / mac 10.6 to 10.11
Intelligent Slot Yes, for use with add-on remote power management network card (model #SNMP-2)
LCD Screen Yes, for Input/Output Voltages, Battery Level, Fault, status codes, and more
Audible Alert Yes
Warranty 2-Year: Equipment and $25,000 Connected Equipment Warranties. 2-Year: Battery Warranty. See Terms of Use and Warranty pages for additional information.
Color Black
Form Factor Rack / tower convertible
Product Dimensions (DWH) 24.8 x 17.2 x 3.5 in / 630 x 438 x 88 mm
Product Weight 60.6 lb / 27.5 kg


Product specifications are subject to change without further notice. Maruson assumes no responsibility, and disclaims all liability, for any damages that may result from the use of this information or for any errors or omissions. Battery backup time varies with equipment, configuration, battery age, temperature, etc.
ULT-P3KRT Runtime
285W 75 minutes   1780W 7.8 minutes
710W 26 minutes   2135W 5.2 minutes
1065W 18 minutes   2500W 4 minutes
1425W 10.5 minutes   2850W 3 minutes


TIME (Minutes)

LV version download here.
HV version download here.

User Manual
Download here.

Download here.

You must connect the USB from your UPS to your computer to use the software.

Compatible Operating Systems
Windows OS: Windows 10/ Windows 8/ Windows 7/ Windows Server 2016/ Windows Server 2012/ Windows Server 2012 R2/ Windows Server 2008/ Windows Server 2008 R2
mac OS: Mac OS 10.6/ 10.7/ 10.8/ 10.9/ 10.10/ 10.11
Linux 32-Bit and 64-Bit: Fedora 7/Redhat Enterprise 7.5/Centos 7/Open SUSE 11.4/Debian 7/Ubuntu 18.10
Virtual Machines (Agent and Client): VMware ESX/ESXi 6.5


Not sure which model to purchase? Or, need help with a purchased item? Let us know how we can help.


Register your product for warranty coverage and expediated service requests.


Find additional information on our warranty policy.