Commercial Solar PV & Battery Storage Project

Full Case Study Description

Project Overview Design and implementation of a 450 kWp commercial photovoltaic system combined with a 500 kWh battery energy storage system (BESS) for an industrial facility. The main objectives were to reduce grid electricity consumption, increase self-consumption of renewable energy, and reduce peak electricity demand. Engineering & Design The project started with a detailed assessment of the facility's electricity consumption, roof areas, existing electrical infrastructure, and grid connection. Based on the site's load profile and available installation areas, the PV system was designed using high-efficiency monocrystalline modules distributed across multiple roof sections. The electrical design covered both DC and AC systems, including string configuration, cable sizing, voltage-drop calculations, DC/AC protection, surge protection, grounding, and integration with the facility's main distribution board. Several three-phase string inverters were selected according to the PV generator configuration and expected operating conditions. The system was designed to ensure efficient MPPT operation across different roof orientations and minimize potential production losses. Battery Energy Storage A 500 kWh lithium-ion BESS was integrated to improve solar self-consumption. Excess PV generation during periods of high solar production was stored and later discharged when the facility's electricity demand increased. An Energy Management System (EMS) controlled the charging and discharging strategy according to PV production, battery state of charge, and facility demand. The BESS was also configured for peak-load management, helping reduce high grid-import periods. Installation & Commissioning The construction phase included installation of the mounting structures, PV modules, DC cabling, inverters, AC distribution equipment, battery system, protection devices, and communication infrastructure. Installation quality was verified through inspections of cable routing, mechanical fixation, labeling, grounding, and electrical connections. Before commissioning, PV strings were tested for polarity, voltage, and insulation resistance. AC protection and switching equipment were verified, while communication between the PV inverters, BESS, EMS, and monitoring platform was tested. The battery system was commissioned and tested under different charging and discharging conditions to confirm correct operation and safety functions. Monitoring & Results A centralized monitoring platform was implemented to continuously track PV production, grid import/export, battery state of charge, charging and discharging power, inverter status, and system performance. After commissioning, the system achieved the expected operational performance and significantly increased the facility's renewable-energy self-consumption. The combination of PV generation and battery storage reduced grid dependency, improved peak-load management, and provided the customer with a scalable and reliable renewable-energy solution. Key Technologies: PV • BESS • Energy Management System • String Inverters • LV Distribution • DC/AC Protection • Energy Monitoring • Grid Integration