Our energy usage monitoring system is a modular micro-grid system that monitors the consumption of electricity in a cluster of customers that are not immediately considered viable for grid connectivity. We setup and designed a wireless network of smart electricity meters. The main controller uploads data measured by connected smart meters to a server where it can be managed and viewed. This will help to support a PAYG payment model that enables access to electricity for low income customers. Also this project has a possibility of real implementation in the field.