Functional Overview of the Energy Maximizer on a Summer Day (example)

Visualization of the energy balance on a summer day with Energy Maximizer activated in Sunny Portal powered by ennexOS (Monitoring > Energy balance).

On the summer day depicted, the Energy Maximizer controlled the energy flows based on PV generation, battery state of charge and consumption. No PV power was generated during the night. The power consumption was predominantly covered by the battery, which can be seen in the diagram by the orange consumption area above the zero line and the continuously decreasing battery state of charge (blue dashed line). The level of grid-supplied power remained low.

PV generation started to increase from the morning hours onwards. The Energy Maximizer initially used the solar power to supply the loads directly. At the same time, it started to charge the battery, which is shown by the increasing state of charge.

PV generation reached its maximum around midday. During this phase, the Energy Maximizer prioritized battery charging. On days with very low or even negative electricity prices, not only is PV generation used, but additional energy is also drawn from the utility grid specifically for charging the battery.

As soon as the battery reached its maximum state of charge in the afternoon (around 4:00 pm in the example shown), the feed-in of PV power into the utility grid was temporarily stopped to avoid economic disadvantages due to negative electricity prices. Grid feed-in was only permitted again once this price phase ended (around 6:00 pm). In total, the battery state of charge increased to almost 100% during the day.

The amount of PV power generated decreased throughout the afternoon and into the evening. At this point, the Energy Maximizer resumed covering consumption with power from the battery. This reduced grid-supplied power and maximized self-consumption until the battery state of charge dropped again towards the end of the day.