9 Apparatus and instruments for accumulating electricity; batteries, especially rechargeable batteries; battery cells, especially rechargeable battery cells; battery management systems (electronic controls); battery boxes; battery packs; battery leads; battery chargers; photovoltaic apparatus and installations for generating solar electricity; photovoltaic cells (solar cells for electricity generation) and photovoltaic modules; solar cells for power generation, especially electric solar cells; inverters, especially photovoltaic inverters