The customer wants to develop a 4G IOT logger, specifically for solar rooftops, which will be cost-effective and customizable. Some Industries operate the solar plant along with diesel generators (DG), in that case, the solar plant generation has to be adjusted according to the load demand. Reverse flow to the DG should be avoided. Apart from this, there are some customers, who are yet to obtain grid export permission. For such customers, the solar plants will be operated, but, will produce only that much required for the load, and don’t allow any grid export. Apart from this, the logger should need to post the data to the cloud and should have an array of digital and analog inputs, USB expansion ports, Ethernet communication ports, isolated RS485 ports, etc. The device should also have the facility of talking multiple protocols to communicate with field inverters and other solar devices.