The present solar energy storage and harvesting system primarily aims to optimize the stringent energy supply requirements for IoT equipment through a meticulous and integral measurement-control system, regardless of recurring factors, and to substantially adjust the storage charge for an adequate solar energy supply. After reviewing Energy Harvesting articles, the following research question arises: How to create a compact, economical device that can solve our problem? Given this situation, the objective of our work is not to create a new prototype but rather to develop one that is economical and solves the problem proposed in this article, addressing the research question. We have directly included surface-mount components (SMD) to reduce size, costs, and achieve optimal response rates. Together with our own programming board based on the ATMEGA328P-AU microcontroller and a power control using IRFZ44N MOSFETs, we aim to create a compact and open-source system. Finally, based on system measurements with both incorporated sensors and measurement instruments, we have obtained a device capable of multitasking for both storage and discharge as required by the 5G equipment connected for its operation. Additionally, the data will be monitored in real-time using Node-RED. The final prototype is a promising solution for the implementation of future 5G Nano Networks.