To adopt nZEB some changes will be needed in traditional requirements such as energy flexibility including energy storage. Flexibility is desirable due to the variable output of renewable sources. Buildings and its technical systems should ideally be designed to allow this flexibility. Energy storage is the easiest way to address the issue of building energy flexibility but other options can be considered:
- Allow for a broader range of accepted indoor environment requirements in limited time periods;
- Create monetary benefits for those who allow the grid manager to temporarily unload specific electrical loads in the building;
- Allow for flexible work time.