December 2025

December 2025: less sun, little wind, limited upside

In December, solar production continued to decline. This is entirely normal for this time of year.

• Solar output was average for December, but naturally low overall.

• The dynamic energy contract still showed only a limited advantage compared to a variable contract.

• Due to the continued lack of price volatility, the added value of battery optimisation remained limited.

• rPOWR and ePOWR revenues were therefore also modest.

In short: the technology worked as intended, but the market offered little room to optimise. Once again, this is normal for this time of year.

Tips for users with the ePOWR energy contract

To get the most out of your system during stable market conditions:

Avoid overly aggressive control of heavy loads (such as heat pumps or EV charging) based purely on day-ahead prices. We see that day-ahead and imbalance prices often move in opposite directions.

Prioritise comfort and stability , this delivers better long-term results. This also helps FlexiO better predict your consumption behaviour, improving future optimisation.

Behind the scenes: We are actively developing target Mode, which will allow for more accurate estimation of EV charging profiles, increasing overall benefits. If you own a compatible charging station, we currently recommend using Smart Mode and Peak Mode for the best results.

Adjust power settings according to your comfort needs, not short-term price noise.