Hello everyone,
I am in the process of designing an energy concept for a residential building housing seven units. The system is designed to operate independently of the grid as much as possible.
Under normal conditions, three Multiplus 5kVA units, in conjunction with a 20kVA solar array, are adequate to meet the power needs of all units. However, during cloudy mornings, the power required may surpass what the Multiplus systems can handle. In such instances, either the GCB (Generator Circuit Breaker) or the MCB (Mains Circuit Breaker) may be engaged to supply power. Once AC-In and AC-out are synchronized, the bypass switch is activated, allowing the option to draw supplementary power from either the grid or a generator. Utilizing a generator, we have the flexibility to either continue battery charging with excess capacity or support the grid with battery power if the generator's output is insufficient.
Additionally, when the batteries are fully charged and the photovoltaic system continues to generate surplus energy, this excess can be fed back into the grid without engaging the bypass switch.
I would appreciate your insights on this energy management proposal. A Codesys PLC will oversee the communication with all devices, ensuring efficient energy distribution and control.
Thanks in advance for your advice and ideas.
Best regards,
Kevin
