Single phase online UPS systems for offices, IT environments, hospitals, retail and commercial applications. APC Smart-UPS, Eaton 9SX, Numeric iTON, Emerson Liebert — expert supply and installation across India.
A single phase UPS operates on 230V single-phase power supply (the standard household and office supply in India). The vast majority of Indian offices, clinics, retail shops, small server rooms and commercial facilities run on single-phase supply — making single phase UPS the most common UPS type in India.
Single phase UPS is available in three topologies: offline (standby), line-interactive and online double-conversion. For IT and commercial applications, we always recommend online double-conversion — it provides zero transfer time, continuous voltage regulation and complete isolation from mains power quality issues. For large loads above 40kVA, or factory/data centre applications, see our three-phase UPS page.
Single Phase Online UPS Products
APC Smart-UPS (1–20kVA)
The industry standard for IT power protection. Online double-conversion, rack-mount or tower, PowerChute network shutdown software and optional SNMP card.
750VA to 20kVA single-phase
SMT, SMX, SRT, SRTL series
Rack-mount and tower options
Extended battery modules available
Eaton 9SX / 9PX (700VA–11kVA)
High-efficiency online UPS with 1.0 output power factor. The Eaton 9PX delivers full kW rating at all loads, avoiding the 20% derating of 0.8 PF competitors.
700VA to 11kVA online
Output PF = 1.0 (9PX series)
Hot-swappable batteries
Eaton IPM monitoring software
Numeric iTON / Poweron (1–40kVA)
Numeric is a Legrand brand offering reliable single-phase online UPS for the Indian market. Good value with strong service support across India.
1kVA to 40kVA single-phase
Online double-conversion
Wide input voltage range
Compatible with Indian DG sets
Emerson Liebert / Vertiv (1–20kVA)
Vertiv Liebert single-phase UPS for mission-critical IT applications. PSI5 and GXT series for small data rooms and edge computing environments.
1kVA to 20kVA single-phase
Liebert PSI5, GXT5, SPA series
High input power factor (>0.99)
SNMP, ModBus monitoring
Frequently Asked Questions
A single phase UPS operates on single-phase power (230V AC in India) on both input and output. It's suitable for offices, small server rooms, hospitals, clinics, retail shops and any application where the load equipment runs on standard single-phase supply. Single phase UPS is available from 600VA (offline) to 40kVA (online). Beyond 40kVA, three-phase UPS is required.
For a server room running on single-phase power, the APC Smart-UPS SRT series (1–10kVA) or APC Smart-UPS Ultra are excellent choices. Eaton 9SX (700VA–11kVA) is an alternative with true online protection and 1.0 power factor. For rooms with a critical single server, APC Smart-UPS 3000VA with a battery extension module (SMX120BP) provides 2–4 hours of backup.
Yes. Most hospital and clinic equipment in India operates on single-phase supply. We supply online UPS with isolation transformers for sensitive equipment like ICU monitors, dialysis machines and operation theatre instruments. For medical-grade requirements, IEC 60601-compliant UPS with galvanic isolation is mandatory — contact us with your specific equipment list for a compliant recommendation.
List all equipment to be protected and note their wattage (from nameplates or data sheets). Add total watts, multiply by 1.25 (25% safety margin), then divide by the UPS output power factor (0.8 for standard UPS or 1.0 for Eaton 9PX). Result is required kVA. Example: 3000W load × 1.25 ÷ 0.8 PF = 4.7kVA → choose 5kVA UPS. See our UPS kVA calculation blog post for a detailed worked example.
Standard internal batteries provide 5–20 minutes of backup on most single-phase UPS. External battery modules (EBM) can extend this to 1–8 hours depending on load and battery capacity. For very long backup requirements (4+ hours), we recommend a DG set with UPS bridging rather than a large battery bank, as the battery cost becomes prohibitive. Contact us to design the right backup duration for your needs.
Single Phase UPS — Expert Supply & Installation
APC Smart-UPS, Eaton 9SX, Numeric iTON and more. Load survey, sizing and pan-India installation. Quote in 2 hours.