There is a big market of small inverters in India and over 4 million inverters are sold every year, so there is big group of prospective customer having inverters/HUPS in their homes and would like to take benefit of renewable energy such as solar energy. The regular solutions available in the market provide a saperate charge controller the existing inverter battery, the
inverter also charges the battery simultaneously when mains supply is present. This kind of solution does not provide optimum performance for charging the battery. When mains is present it would charge the battery at a constant current and the solar energy would not be utilized fully when mains supply has already charged the battery to full state.