We digitalise transformers and bring them online and connected for a safer energy transition. Oktogrid's technology allows electricity providers to add a digital interface to any transformer in less than ten minutes with no tooling needed. Our method gives non-invasive access to critical transformer and grid performance data in realtime making it possible to monitor, forecast, and react to local congestions and reduce cost of asset management. We effectively turn an energy challenge into a data science opportunity for electricity transmission and distribution companies to build data-driven organisations; enabling them to make new decisions in a new energy scenario for a cleaner future.