The energy crisis of the past couple of years has put power efficiency at the top of operators’ agendas, especially if they are building high-performance 5G RANs with Massive MIMO. These solutions are power-efficient compared to 4G on a like-for-like basis, but as 5G RANs involve rapidly increasing numbers of base stations and antenna elements, their overall consumption is rising. There are, depending on definitions, around 10 million cell sites globally – with various levels of complexity and equipment requirements. As such, there are both significant risks and opportunities, when it comes to efficiency and generation at a global scale. Operators are turning not just to technology but to new ways of procuring and generating power, in order to reduce…