Online UPS Systems Dealers in Mumbai

Double-conversion online UPS with zero transfer time. Protecting servers, medical equipment and critical loads from 1kVA to 6,000kVA.

Call +91 80080 06503

About Online UPS

What is a Double-Conversion Online UPS?

An online UPS — also known as a double-conversion UPS — operates by continuously converting incoming AC power to DC and then back to AC. Because your equipment always runs off the UPS inverter output, there is literally zero transfer time when mains power fails. The battery is continuously connected to the DC bus, so the switchover is instantaneous and completely seamless.

This topology also filters out all power quality problems — voltage fluctuations, frequency variations, harmonic distortion, sags, swells and spikes — delivering a perfectly clean, regulated sine wave to your equipment regardless of input power quality. This makes online UPS the preferred choice for server rooms, medical equipment, CNC machines, telecommunications, CCTV systems and any other application where momentary power interruptions or dirty power could cause damage or data loss.

Key Benefits of Online UPS

Zero transfer time — no switchover gap when mains fail
Pure sine wave output regardless of input quality
Complete isolation from mains — eliminates surges, spikes and harmonics
Wide input voltage range (typically 110V–300V) without battery drain
Stable output frequency even if input frequency drifts
Suitable for generator input — synchronises cleanly
Scalable battery runtime with external battery packs (EBM)
Remote monitoring via SNMP / USB / RS-232 on advanced models
High power factor (0.9–1.0 on modern units) means better efficiency

Available Online UPS Brands

APC by Schneider Eaton Emerson / Vertiv Numeric

Microtek

Online UPS Capacity Range & Typical Applications

Capacity	Typical Application	Est. Runtime (at full load)	Phase
1 kVA	1–2 workstations, CCTV DVR	15–20 min	Single Phase
2 kVA	Small server, 3–5 PCs	15–20 min	Single Phase
3 kVA	Small server room, network rack	15–25 min	Single Phase
5 kVA	Mid-size server room, clinic equipment	10–20 min	Single Phase
10 kVA	Server room, imaging machines, SME	10–15 min	Single Phase / 3-Phase
20 kVA	Medium data centre row, hospital ICU	10–15 min	3-Phase
40 kVA	Large data centre, manufacturing line	10–15 min	3-Phase
80 kVA	Large enterprise data centre	10–15 min	3-Phase
100–200 kVA	Tier 2/3 data centres, hospitals	10–15 min (extendable)	3-Phase
200–6,000 kVA	Mega data centres, industrial plants	As designed	3-Phase

* Runtime can be extended to 1, 2, 4 or 8 hours with external battery banks. We design custom battery systems for specific runtime requirements.

Frequently Asked Questions

Yes and no. In a double-conversion online UPS, the load always runs from the inverter output (which is powered by the DC bus). However, the rectifier is continuously charging the DC bus from mains power. The battery only supplies energy when mains power is lost. The battery is always connected and ready, but it is not fully discharging during normal operation — it is simultaneously being kept at full charge.

Yes. Online UPS systems have wide input voltage and frequency acceptance ranges, making them well-suited for generator input. The double-conversion topology isolates the load from any frequency or voltage instability produced by the generator during startup or under variable load. This is one of the key advantages of online UPS in locations with frequent power cuts and generator backup.

Most online UPS models support external battery packs or can be connected to a dedicated battery bank for extended runtime. With custom battery design, runtimes of 1, 2, 4 or even 8+ hours are achievable. Our engineers will calculate the exact number of batteries and battery bank size required to meet your specific runtime target.

Yes, installation and commissioning is part of our service. Our certified engineers handle everything from site survey and cable sizing to physical installation, battery connection, load testing and handover training. For large projects (10kVA and above), we also provide as-built documentation and commissioning certificates.