Aryavart Grameen Bank operates in six districts of Uttar Pradesh. AGP decided to install PV systems at five of its branches to provide back up power during mains power cuts. The PV modules generate DC electricity in sunlight, which is stored in rechargeable lead-acid batteries. When the mains fail, the batteries are used to run an inverter, which converts the DC to AC at mains voltage and frequency to power essential loads like computers.