MARUSON 1000VA Online UPS Battery Backup, Double-Conversion Uninterruptible Power Supply, TAC-TW1KB
€394
Price: $393.70
(as of Oct 02, 2025 07:23:01 UTC – Details)
Product description
TAC-TW1KB Double-Conversion Online UPS
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Safeguard your critical equipment with the Tacoma TW Series UPS. This top-tier system offers clean, reliable power and seamless battery backup during outages. Smart battery management ensures longevity and timely replacements. Experience peak UPS innovation for uninterrupted business continuity.
Overview 1000VA / 900W capacity Online double-conversion topology with pure sine wave output 4 x NEMA 5-15R outlets NEMA 5-15P straight plug Zero transfer time from Line to Battery Mode 1% output voltage regulation for precision Emergency Power Off (EPO) / Remote On / Off (ROO) communication Active Power Factor Correction (PFC)
Online Double-Conversion Topology
The mains supply is fed directly into the UPS and charges batteries within the UPS. The battery power is then converted back to mains 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 to battery in case of a power disturbance prevents malfunction for mission-critical equipment.
Pure Sine Wave Output
Best waveform for sensitive electronics. Benefits include:
Smoother waveformBest for sensitive equipmentHigher quality than modified sine waveMaintains voltage at a safe levelMotors run at their intended speed and with less heatEquipment runs with less noiseIT equipment lasts longerLow harmonic distortion
Communication & Software
USB & RS232 Communication Ports
Power management with included software to schedule shutdowns, monitor UPS and connected equipment, send email/SMS alerts, and more.
Intelligent Slot
Add on a network card to remotely monitor & control the UPS via ethernet.
Safety
Emergency Power Off (EPO) / Remote On/Off Communication
Instantly shut off the UPS and prevent the UPS from supplying power in the event of an emergency.
cTUVus Certified
TUV-certified under UL1778 standards. This model has been tested by a third-party lab and passed safety standards for use in the USA and Canada.
TUV Rheinland of North America is an accredited third-party Nationally Recognized Testing Laboratory (NRTL) that certifies electrical devices used or sold in the USA and Canada.
Optional (Not Included) Add-Ons & Accessories
Purchase these separate add-ons as needed for your setup needs:
Network Management Card – Remote power management option with an add-on NMC card.
Typical Use Applications
Networking: Servers, NAS, routers, switches, etc.
Corporate Offices & Retail: High-performing computers, security systems, VoIP / PBX systems, office equipment, ATMs, workstations
Entertainment & Laboratory: Slot machines, entertainment devices, lab equipment
Additional Features
DSP Controlled Technology & Active PFCDigital Signal Processor (DSP) controlled technology for high reliability, accuracy, and efficiency.Active Power Factor Correction (PFC) improves the power factor and power quality of the UPS by reducing harmonic distortion on the electrical system to improve energy efficiency and reduce energy loss. Additional benefits include active wave shaping of input current, low voltage drop, filtering high-frequency switching, waveform control through feedback sensing from the power source, and regulation of output voltage based on feedback control.Wide Input Voltage Range & Frequency Tolerances – Minimizes the need to switch over to battery power and frequency of battery charge and recharge cycles by correcting extreme voltage distortion for higher system reliability.Output Voltage Regulation – The output voltage maintains a fixed 1% output voltage regulation even when parameters such as ambient temperature change. A precise output voltage is most important for sensitive electronic equipment such as ones that require calibration.Optional Add-Ons & AccessoriesOptional Network Management Card (not included) – Remote power management option with an add-on NMC card. See ASIN # B096WC4ZYB for the network card for this series.
Power Management Software
The included software offers a user-friendly interface to monitor and control the UPS, and monitor other UPS on the same LAN. Additional features include:
Real-time monitoring of the UPS and other ones on the same LANScheduled system shutdown, restart, or UPS testWarning notificationsAnd more
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Customer Reviews
3.6 out of 5 stars 4
3.6 out of 5 stars 4
4.0 out of 5 stars 22
5.0 out of 5 stars 1
3.6 out of 5 stars 4
5.0 out of 5 stars 1
Price
$393.70$393.70 $440.62$440.62
— no data
$454.91$454.91 $705.23$705.23 $828.69$828.69
Capacity
1000VA / 900W 1000VA / 900W 1000VA / 900W 1500VA / 1350W 2000VA / 1800W 2000VA / 1930W
Topology
Double-Conversion Online Double-Conversion Online Double-Conversion Online Line-Interactive Double-Conversion Online Double-Conversion Online
Waveform (on Battery Mode)
Pure Sine Wave Pure Sine Wave Pure Sine Wave Pure Sine Wave Pure Sine Wave Pure Sine Wave
Transfer Time (Line <> Battery)
Zero Zero Zero 2 – 6ms (typical); 10ms (max) Zero Zero
Approx. Runtime (450W)
10 Minutes 14.5 Minutes 14.5 Minutes 16 Minutes 29 Minutes 21 Minutes
Input Voltage Range
65 – 145 Vac 65 – 145 Vac 55 – 140 Vac 102 – 132 Vac 65 – 145 Vac 55 – 150Vac
Battery Backed Outlets w/Surge Protection
4 4 4 8 6 + terminal 8
Output Voltage Regulation
≤1% ≤1% ≤1% ≤1% ≤1% ± 1%
Status Indicator
LCD & LED LCD & LED LCD LCD LCD LCD
Form Factor
Tower Tower Tower 2U Rack / Tower Tower 2U Rack / Tower
Technical Specifications
Capacity 1000VA / 900W Topology / Phase Double-conversion online / single phase Input Voltage Range 65 – 45 Vac at half load / 100 – 145 Vac at full load Input Frequency Range 56 – 64Hz (at 60Hz) Input Type NEMA 5-15P Output Voltage 100 / 110 / 120 / 125Vac (Customtizable in Settings) Output Frequency Regulation 50/60 Hz (synced to mains input at Line Mode) Voltage Regulation ≤1% Outlets NEMA 5-15R x 4 Total Harmonic Distortion 2% for linear load / 8% for non-linear load Crest Factor 3:1 Efficiency – Line Mode >88% Efficiency – Battery Mode >85% Efficiency – ECO Mode >95% at full load with batteries fully charged Recharge Time <5 hours to 90% capacity Battery 12V/7Ah x 2 (rated 24 Vdc, sealed lead-acid type)
1000VA/900W online double-conversion uninterruptible power supply (UPS) battery backup system with true sine wave output to protect network devices, workstations, and other mission-critical electronics
OUTLETS: 4 x NEMA 5-15R provides battery backup and surge protection. INPUT: NEMA 5-15P with 5-foot power cord. BATTERY: 2 x 12V/7Ah SLA.
Digital signal processor (DSP) technology, active power factor correction (PFC), wide input voltage range, output voltage regulation within 1% threshold, EMI/RFI filter, and user-selectable settings for superior performance
Multifunction LCD and LED status indicators show real-time information of power conditions, battery capacity, early battery replacement notification, and more
WARRANTY: 2-year UPS, Battery, and $25,000 Connected Equipment Warranties. OPTIONAL ADD-ONS: Network card for remote monitoring.
4 reviews for MARUSON 1000VA Online UPS Battery Backup, Double-Conversion Uninterruptible Power Supply, TAC-TW1KB
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€394
JL –
Inexpensive online UPS, but a bit noisy, and you’ll need to do some work to get it working with PC!!
This double-coversion/online UPS is a “sleeper”… the most inexpensive online UPS that actually works, including having power management software. The worst part is there is no/very little support and it is a bit noisy, but what you get is a UPS that will work with generators for a very good price.It comes with a USB-to-DB9 cable but that didn’t work. My tower PC never detected it when plugged in. So I found that I needed 2 additional cables:https://www.amazon.com/dp/B00A6GIUZAhttps://www.amazon.com/dp/B00AHYJWWGThe 2nd one is the main electronic conversion cable but for some reason it has screw blocks that prevent from plugging into the back of the UPS, so I had to buy the 1st one to adapt it so it could connect to the DB9 at the back of the UPS.Then I got the Winpower G2 software working on Windows 10 (for some reason Maruson buries the link, so you have to View source on their web page and find the download link).It took me a while to get the G2 software to find the UPS (the documentation is bad), but I think what made it work is there is a button that allows you to download a license and then you have to import the license file. After that the G2 software was able to find the UPS (in my case on COM7 port), and it is actually pretty nice.So it takes a bit of work to get everything working, but this is a helluva deal. I’ve already had one “event” where we lost main power, and it takes about a minute for the generator to kick in, but this UPS kept my tower running fine.Highly recommended – A++++!
TED F HOUBEN –
User Manual Obsolete
Included directions are obsolete. None of it much works. You may have to contact Maruson about updating their instruction manual.
Beach lover –
Loud fan
They are very loud.
Doug Anderson –
Works
Seems to work just fine. Providing clean power. I did not attempt to set up the interface to the PC. I just use it for dealing with generator power when we have a power outage.