A low-cost solar generation monitoring system suitable for internet of things

This work presents an internet of things low cost instrument specially developed to measure and quantify the energy generation of photovoltaic panels. A hub was developed, capable of managing networks with hundreds of nodes, storing the data locally and being able to transmit relevant information to cloud services, besides that, hosts a HTML page for local and internet access to data. The sensor nodes can measure solar panel DC outputs up to 60 V and 30 A. Besides the system was designed to have low-power consumption. A display interface to manage data from many sensors allows view and generate period reports in XLS, CSV and PDF formats.