Microtek Online UPS MAX+ 3KVA 72V Pure Sinewave Without Batteries

The Microtek Online UPS MAX+ 3KVA 72V is a high-frequency double-conversion online UPS rated at 3 KVA / 2700 watts with pure sinewave output, zero transfer time from AC to battery mode, IGBT-based topology, advanced PFC with 0.99 power factor, wide input voltage range (110–300V), static bypass, generator compatibility, RS232/SNMP communication, and LCD/LED display. This is the “without batteries” variant — the UPS unit ships without internal batteries, allowing you to connect an external 72V battery bank (6 × 12V batteries) sized to your exact runtime requirement. If you are looking for the Microtek MAX 3KVA 72V online UPS price in India with a 2-year warranty and valid GST invoice, Thencix stocks genuine Microtek products at our Nehru Place, Delhi store. Browse our full range of power backup and hardware accessories at Thencix.

Microtek MAX+ 3KVA — True Double-Conversion Online UPS

The MAX+ 3KVA uses true double-conversion online topology — the most reliable UPS architecture for mission-critical equipment. The rectifier continuously converts incoming AC power to regulated DC, charging the external battery bank while simultaneously feeding the inverter. The inverter converts DC back to clean, regulated 230V AC pure sinewave output for your connected equipment. Your servers, networking gear, and sensitive electronics never run on raw mains power — they always receive filtered, voltage-regulated, frequency-stabilised output from the inverter.

This architecture delivers zero transfer time from AC to battery mode — there is no switching gap because the inverter is always running. Line-interactive and offline UPS systems exhibit 4–10 ms transfer gaps that can crash sensitive equipment. The MAX+ eliminates this completely. If mains power fails, fluctuates, or produces noise, the connected equipment sees no change whatsoever — the inverter continues outputting clean power from the battery bank without interruption.

Wide Input Range and Generator Compatibility

Indian mains power is notoriously unstable — voltage dips below 160V during peak summer load, spikes above 260V during off-peak hours, and generator power is often distorted and frequency-unstable. The MAX+ handles all of this with a wide input voltage range of 110–300V at loads under 50% and 160–300V at loads above 50%. The advanced Power Factor Correction (PFC) circuit achieves 0.99 input power factor at full load, meaning the UPS draws clean current from the mains without injecting harmonic distortion back into your building’s electrical system.

Generator compatibility is built in — the UPS accepts generator power as long as the generator produces sinewave voltage. The wide frequency acceptance range of 40–70 Hz handles the frequency instability common in diesel generators during load changes. For Indian offices, shops, and server rooms that switch between mains and generator during power cuts, the MAX+ provides seamless transition without any interruption to connected equipment.

External 72V Battery Bank — Size Your Own Runtime

This is the “without batteries” variant — the UPS unit does not include internal batteries. You connect an external 72V DC battery bank consisting of 6 × 12V batteries in series. This design gives you complete freedom to choose battery capacity based on your runtime needs. For short-runtime server protection (10–15 minutes), use 6 × 12V 7AH SMF batteries. For extended runtime during long power cuts (2–4 hours), use 6 × 12V 150AH or 200AH tubular batteries. The inbuilt charger delivers 9.5A charging current for reliable recharge of your battery bank.

The advanced battery management system monitors battery health, prevents deep discharge, and supports charging even when the UPS is switched off — ensuring your batteries are always ready. The external battery configuration also means battery replacement is simple and inexpensive — swap individual batteries without replacing the entire UPS or sending the unit for service. For a complete power backup solution, pair this UPS with compatible batteries and a battery rack — WhatsApp +91 9891150949 for sizing guidance.

Protection Features and Communication

The MAX+ includes comprehensive protection: inbuilt OVCD (Over Voltage Cut-Off Device) with surge protection, static bypass (automatic transfer to mains if the inverter fails), overload protection (bypass at 130% for 5 minutes, immediate bypass at 140%), short circuit protection, over-temperature protection with automatic shutdown, and DC fan failure detection. The static bypass can be enabled or disabled based on your preference — disable it for critical medical or industrial equipment that should never receive raw mains power even if the inverter fails.

RS232 serial communication with included monitoring software allows real-time UPS status monitoring from a connected PC — input voltage, output voltage, battery level, load percentage, and alarm history. An optional SNMP card slot enables network-based monitoring for data centre environments where the UPS is managed remotely via SNMP management software. The LCD and LED displays on the front panel show real-time status simultaneously — visible even in a dark server room during a power cut. For network switches and routers that this UPS can protect, browse our networking equipment at Thencix.

Key Features — Microtek Online UPS MAX+ 3KVA 72V

• 3 KVA / 2700W Double-Conversion Online UPS: IGBT-based high-frequency topology. Pure sinewave output. Zero transfer time from AC to battery — connected equipment sees no interruption
• Wide Input: 110–300V, PF 0.99, Generator Compatible: Handles Indian voltage fluctuations and generator power. 40–70 Hz frequency range. Advanced PFC draws clean current from mains
• External 72V Battery Bank — Custom Runtime: Without internal batteries — connect 6 × 12V batteries sized to your needs (7AH to 200AH). 9.5A inbuilt charger. Battery charging in UPS off mode
• Static Bypass, OVCD, Overload and Short Circuit Protection: Auto bypass at 130%/5min or 140%/1.5sec. Over-temperature shutdown. DC fan failure detection. Surge protection
• RS232 + SNMP (Optional), LCD/LED Display: Real-time monitoring via PC software. Network management via SNMP card. Programmable and non-programmable outlets. Made in India

Technical Specifications — Microtek Online UPS MAX+ 3KVA 72V

Package Contents

• 1x Microtek Online UPS MAX+ 3KVA 72V (main unit)
• 1x Power cable
• 1x RS232 communication cable
• 1x Monitoring software CD
• 1x User manual
• Note: BATTERIES NOT INCLUDED. This is the “without batteries” variant. You need 6 × 12V batteries connected in series to form a 72V bank. Choose capacity based on your runtime needs — 7AH for short backup, 100AH–200AH for extended runtime. WhatsApp +91 9891150949 for battery sizing help.
• Note: Battery interconnect cables, battery rack, and SNMP card are NOT included and must be ordered separately if needed.

Ideal Use Cases — Microtek MAX+ 3KVA in India

Server Rooms and Networking Equipment: The zero transfer time protects file servers, NAS devices, managed switches, firewalls, and VoIP PBX systems from power interruptions that cause data corruption and service downtime. The pure sinewave output is essential for switch-mode power supplies in server hardware — modified sinewave from cheaper inverters can damage server PSUs. The RS232/SNMP monitoring lets your IT team track UPS status remotely. With an external 200AH battery bank, a typical 1.5 KW server room runs for 3–4 hours during extended power cuts.

CCTV Control Rooms and Security Systems: NVRs, DVRs, PoE switches, and monitoring displays in CCTV control rooms need uninterrupted power to maintain continuous recording during power cuts. The 3 KVA capacity comfortably handles a 16-channel NVR, a 24-port PoE switch, and 2 monitors. The static bypass ensures continued power even in the rare event of an inverter failure. For the CCTV equipment this UPS protects, browse our complete CCTV range at Thencix.

Shops, Billing Counters, and POS Systems: A retail shop running billing software, a thermal printer, a computer, a router, and a CCTV DVR draws roughly 800–1200W — well within the 2700W capacity of this UPS. The wide input voltage range handles the voltage fluctuations common in Indian market areas and commercial complexes. Generator compatibility means seamless switching between mains and DG set. GST invoice from Thencix for full input tax credit on business purchases.

Medical and Diagnostic Equipment: Dental chairs, diagnostic monitors, lab analysers, and medical imaging workstations require clean, uninterrupted power. The ≤2% THD output and zero transfer time protect sensitive medical electronics. The static bypass can be disabled for equipment that must never receive raw mains power. The external battery configuration allows hospitals and clinics to size battery banks for extended runtime during long power outages in semi-urban and rural areas.

Why Buy the Microtek MAX+ 3KVA from Thencix

Thencix stocks genuine Microtek products at our Nehru Place, Delhi store — every unit is specification-verified and backed by our in-house support team.

• 100% genuine Microtek product — authorised channel, sealed box
• 2-year Microtek manufacturer warranty — Thencix handles everything: diagnostics, pickup, replacement, return. You don’t lift a finger
• Valid GST invoice with every order — claim full input tax credit
• Battery sizing guidance — WhatsApp for runtime calculation based on your load
• Compatible batteries, battery racks, and SNMP cards available
• Express delivery across Delhi, Noida, Gurgaon, and Faridabad
• Pan-India delivery available (insured shipping for heavy items)
• Cash on Delivery available
• Walk-in: 109B Osian Building, 12 Nehru Place, Delhi 110019
• WhatsApp: +91 9891150949