Validation of the electrical configuration of a bank of reconditioned nickel-metal hydride (NiMH) batteries in an off-grid photovoltaic system for powering an automotive repair shop
Keywords:
SFV; prototype, electrical configuration, series-parallel connections, voltage drop, electrical conductors, autonomous energyAbstract
This study validates the implementation of a battery bank consisting of reconditioned NiMH batteries from hybrid vehicles, powered by an off-grid photovoltaic system, for an automotive repair shop. In compliance with CPE INEN-NEC 2018, IEC 60617, and ARCONEL 001/21 standards, thereby ensuring operational safety and mitigating thermal failures through interconnection protocols. Meeting the identified critical energy demand of 3.64 kWh/day, the designed system uses four 550 Wp panels and a 3.8 kVA inverter, successfully covering 14% of the workshop’s total consumption. Despite limitations such as self-discharge, the technical feasibility confirms a two-year payback period. The study concludes that the reuse of recycled NiMH batteries promotes the circular economy and reduces operating costs through a properly designed electrical installation. Furthermore, it establishes a replicable educational model that strengthens technical training in renewable energy and promotes environmental sustainability.
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Copyright (c) 2026 Karla Patricia Vera Calderón
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