Kolkatta based Epoch Electronica Ltd established in 1981 has grown into one of the leading manufacturer of online UPS systems in the country. The company is the SD's No. 10 Power Electronic Company of the year. Epoch is the new entrant in the SD’s top 10 club. The company netted a turnover of 50.10 crores up from 23.11 crore it had in 2010-11.

EPOCH is the largest UPS manufacturer in Eastern India having a well equiped modern works with design and development facility at Howrah (West Bengal) and have been awarded ISO 9001-2000 quality certification from DNV Netherlands, Initially EPOCH hit the market with the house hold inverter and later Servo Controlled Voltage Stabiliser, The product started making a niche in the market and then ventured upon into the highly competitive market of Un-interruptible Power Supply (UPS) system in the year 1988. EPOCH'S primary strength comes from its field proven reliability, design and development skill, and after sales service network to support more than 8000 installation base throughout India. In addition, EPOCH has its own computer aided design facility. Epitomizing, EPOCH is a group of professionals having enthusiasm, consistency and above all are firmly resolved to meet the demands of the consumers. Today EPOCH is a rapidly growing multi-crore power electronics company enjoys the reputation as a leading manufacturer of quality product and innovative engineering. EPOCH UPS is manufactured in an environmentally controlled 7500 sq.ft. workshop having latest computerised testing facilities and own design and development centre. The company to its credit has won major orders from WEBEL, DOT, BSNL, Railways, Coal India, Steel Authority of India(SAIL), Ordance Factory, Berger Paints, Asian Paints, Pantaloons, Peerless Hospital, Woodland Hospital, ITC, HCL, PCS, WIPRO, Apeejay, Goodricke Williamson,

Magor-Tea Gardens, State Bank of India, Allahabad Bank, UCO Bank, Central Bank of India, UBI, LIC, Peerless etc.