Microtek MAX+ 3KVA/72V Online UPS with Inbuilt Battery 2Yr (Model: NM72MX3KK11-IB)

The Microtek MAX+ NM72MX3KK11-IB is a premium 3KVA / 2700W online double-conversion UPS system with factory-installed internal batteries – a complete, ready-to-use power backup solution for mission-critical applications. Designed for computer networks, servers, cyber cafes, ATM machines, laboratories, and industrial control systems, this high-frequency IGBT-PWM based UPS delivers pure sinewave output with zero transfer time and complete galvanic isolation through its inbuilt isolation transformer. With six 12V / 7.0AH SMF-VRLA batteries pre-installed inside the rugged tower chassis, this all-in-one unit eliminates the need for external battery banks while providing reliable backup for your most sensitive equipment.

Explore the complete range of Microtek MAX+ Series professional power solutions at our dedicated Microtek MAX+ UPS collection. Every unit is sourced from authorised channels and carries manufacturer-verified specifications.

Official Warranty – 2 Years Comprehensive Coverage

The Microtek NM72MX3KK11-IB carries official 2 Years comprehensive onsite warranty, verified through Government e-Marketplace (GeM) and multiple authorised resellers. The warranty covers manufacturing defects, component failures, and workmanship issues with Microtek’s authorised service network ensuring rapid onsite support across India. Thencix provides complete in-house warranty assistance — you never need to contact Microtek directly. We handle diagnostics, service appointment scheduling, and replacement processing on your behalf. Valid GST invoice is required for warranty service.

True Online Double-Conversion with Inbuilt Isolation Transformer

The NM72MX3KK11-IB employs genuine online double-conversion topology using high-frequency IGBT-PWM technology with micro-controller based design. The rectifier converts incoming AC mains to regulated DC power, simultaneously charging the internal 72V battery bank, while the inverter continuously converts DC back to clean, stable pure sinewave AC power for connected equipment. Unlike the 1KVA IB model, this 3KVA version features an INBUILT ISOLATION TRANSFORMER providing complete galvanic isolation – eliminating ground loops, attenuating common-mode noise, and offering superior protection for sensitive medical, laboratory, and audio-visual equipment. Transfer time is zero from AC mode to battery mode and less than 4ms from inverter to bypass mode – your critical loads remain operational through every voltage sag, spike, surge, or complete blackout without interruption.

Integrated Battery Bank – 72V / 7.0AH x 6

This UPS ships with six 12V / 7.0AH SMF-VRLA (Sealed Maintenance-Free – Valve Regulated Lead Acid) batteries pre-installed and factory-connected in series to form a 72V DC bank with total capacity of approximately 420VAH. The batteries conform to JISC:8702 standards and are specifically designed for UPS duty cycle applications. The integrated 1.5 Amp intelligent charger maintains battery health through an advanced three-stage charging algorithm (bulk, absorption, float), with automatic battery charging function even when the UPS is in off mode. Backup time with standard internal batteries is approximately 10-20 minutes at 50% load (1350W). For extended runtime requirements, this model supports external battery cabinets.

Inbuilt Over Voltage Cut-Off Device (OVCD) and Comprehensive Protection

The NM72MX3KK11-IB incorporates an inbuilt Over Voltage Cut-Off Device with integrated surge protection. This critical safety feature continuously monitors incoming mains voltage and instantly disconnects the UPS if unsafe voltage levels are detected, safeguarding both the UPS unit and your sensitive connected equipment from damage. Comprehensive protection suite includes:

• Short Circuit Protection: 5 cycles turn off inverter, no transfer to bypass, audible alarm (AC mode); 5 cycles turn off inverter, audible alarm (battery mode); input fuse blown or breaker action
• Overload Protection: >110%: 30 seconds transfer to bypass mode; >150%: instant transfer to bypass mode
• 20% Overload for 10 minutes minimum
• 50% Overload for 1 minute minimum
• Over Temperature Protection
• DC Fan Failure Protection
• EMI/RFI Noise Filter
• Low Battery Cut-Off
• Static Bypass (Enable/Disable)

View our complete range of Microtek UPS systems, stabilizers, and power protection solutions for all your critical power needs.

Technical Specifications

Advanced PFC Technology and Generator Compatibility

The NM72MX3KK11-IB incorporates Advanced Power Factor Correction (PFC) technology, maintaining input power factor above 0.99 at full load for reduced harmonic pollution and improved energy efficiency. The UPS is fully generator-compatible, with wide input voltage and frequency windows that accept power from standard sinewave generators even when output voltage and frequency fluctuate. This makes the MAX+ 3KVA an ideal choice for sites with frequent, prolonged power cuts where generator backup is essential, as well as for industrial applications, data centers, and critical infrastructure installations.

Advanced Battery Management and Smart Communication

The Microtek Advanced Battery Management system continuously monitors battery voltage, temperature, and charge current, automatically adjusting charging parameters to suit the connected battery type and condition. This intelligent management extends battery service life and optimises performance. The Smart RS232 communication interface, complete with included monitoring software, provides real-time status, event logging, and graceful shutdown capabilities for connected servers and workstations. An optional SNMP card slot enables advanced network management integration for enterprise environments.

For complete installation requirements including power cables, communication cables, and accessories, browse our comprehensive selection of UPS peripherals.

Inbuilt Isolation Transformer – Superior Noise Immunity

A key differentiator of this 3KVA model from smaller Microtek IB units is the INBUILT ISOLATION TRANSFORMER. This provides complete galvanic isolation between input and output, eliminating ground loops, attenuating common-mode and transverse-mode noise, and offering superior protection for sensitive medical, laboratory, research, and audio-visual equipment. The isolation transformer also provides enhanced surge suppression and common-mode noise rejection that standard online UPS systems cannot match.

Package Contents

• Microtek NM72MX3KK11-IB 3KVA 72V Online UPS – MAX+ Series (Internal Battery Version)
• 6 x 12V / 7.0AH SMF-VRLA batteries – factory-installed inside UPS unit
• Input power cable (Indian standard 15A plug)
• Output socket strip / terminal block (configuration may vary by SKU)
• RS232 communication cable
• Monitoring software CD
• User manual and quick installation guide
• Movable trolley for batteries
• Warranty card (2 Years Warranty registration)

Important – Complete System: This UPS ships with all internal batteries factory-fitted and ready for immediate use. No external batteries are required for standard operation. For extended runtime requirements, external battery cabinets are available separately.

Why Buy from Thencix?

Thencix is India’s trusted source for professional power backup solutions. Every UPS, inverter, and accessory is specification-verified, securely packaged, and backed by dedicated after-sales support.

• Authentic products with manufacturer-verified specifications
• Professional, damage-safe packaging
• Fast delivery across India
• GST invoice with every order
• Cash on Delivery available
• Guided installation support via WhatsApp
• In-house warranty assistance — no need to contact the brand directly
• Warranty appointments arranged for you

Support:
Email: [email protected]
WhatsApp: +91 98911 50949

Complete Your Power Protection Ecosystem

Browse our complete range of Microtek UPS systems, online UPS, offline UPS, and power inverters to find the perfect solution for your application. For establishments requiring comprehensive power protection across multiple locations or for data center deployments, contact our enterprise sales team for customized solutions and volume pricing.

Ideal Applications

• Data Centers & Server Rooms: 3KVA capacity with zero transfer time protects critical IT infrastructure from data corruption and hardware damage. Inbuilt isolation transformer provides superior noise immunity
• Telecommunications: Network racks, exchanges, edge servers, and communication equipment requiring clean, regulated sinewave power
• Healthcare Facilities: Diagnostic devices, patient monitors, pathology equipment, laboratory instruments, and medical imaging systems requiring isolation transformer protection
• Industrial Automation: PLCs, sensors, control systems, CNC machines, and process equipment
• Cyber Cafes & Gaming Centers: Multiple workstations requiring reliable backup protection
• Educational Institutions: Computer labs, library servers, research equipment, and administrative systems
• ATM Machines & Banking: Reliable backup power for financial transaction equipment with stringent power quality requirements
• Commercial Establishments: POS systems, security control rooms, building management systems, and critical office infrastructure