Why choose 'Transformer-based' or 'Transformer-less' UPS?

T ransformer based Traditional technology, typically available from 10 kVA, suitable for industrial applications, galvanic isolation with inverter output transformer, typically standard technology from 100 kVA upwards Transformer-less Typical technology from the smallest ratings up to 120 kVA, more compact footprints, lower weights, more suited to IT applications and environments, high efficiency across the load range, generally more cost effective.