There are various brands of Inverter and online UPS available in many variants like APC UPS 500VA, MicroteK UPS, Intex UPS, Numeric UPS digital 600 plus and many more in my stores...
Output Waveform On UPS Mode Battery Charging Current : TPZi Waveform (TRAPE ZODAL WAVEFORH) Constant charging approx 10% of the rated battery current in AH
Output Waveform On Mains Mode : (INV) 90V-300V, (UPS) 180V-260V
Efficiency : >84%
UPS Overload/UPS Short Circuit : 110% / 300%
Output Frequency On UPS Mode : 50 Hz ±0.1 Hz
Output Voltage On Mains Mode : (INV) 90V-300V, (UPS) 180V-260V