37 Installation, construction, maintenance and repair of energy storage systems and energy generating systems for others; installation, construction, maintenance and repair of components of energy systems, namely, photovoltaic solar modules, solar module mounting devices, battery energy storage systems, namely, battery cells, battery modules, battery management systems, battery mounting systems, and battery enclosures, inverters, voltage step-up transformers, electric cables, control instrumentation, metering instrumentation, and parts and accessories therefor; consulting in the fields of installation, construction, maintenance and repair of energy systems