From an energy balancing perspective it is possible. if the battery storage is empty and should be charged during the day when also other types of user are extracting power from the micro-grid, then the load can increase exceeding the normal capacity. But this will depend on how the BESS is configured and how big your battery is. Normally in the BESS there is a charging duration time that you can define. The charging duration time is having an impact o now much energy you are using from the grid to charge your battery. As shorter the duration time is set up, as more energy you will extract from the grid.