Viessmann Energy Management reduces energy costs and at the same time fulfills the wish of many customers for the intelligent use of self-generated photovoltaic electricity to reduce climate-damaging emissions. The system optimizes the electricity consumption of the heat pump, the charging of electricity storage systems and electric vehicles and guarantees the highest possible level of self-consumption while simultaneously reducing the amount of electricity drawn from the public grid. Energy suppliers have been offering dynamic electricity tariffs since January 1, 2025. Every electricity customer can benefit from low or even negative electricity prices. To do this, electricity must be consumed when it is cheapest. Viessmann Energy Management takes over the control and makes optimum use of the electricity tariffs available at the time.