Green Energy

I guess they built it there so it can make use of existing infrastructure without too many major changes .

That drives up maintenance significantly. You suddenly need your technicians driving around everywhere servicing small units rather than at one central location making sure the main unit is online.

Both is better. Centralised is more efficient for maintenance and cost. Distributed allows less transport cost for the power and less chance of total failure, ut more chance of individual failure.

One of the issues with transitioning is the grid is designed with large plants in mind. Using existing infrastructure more efficiently makes renewables more attractive for investment, which hastens the transition.

Large scale batteries tend to need to be connected to the grid to function, they need to sync with the grid frequency, and can't run by themselves.

Home battery banks are a thing. EVs also work. We are moving towards virtual power plants and micro grids just that most power grids were not designed for power consumers to also be power generators. They are working through the technical standards like OCPP. ...

The large-scale electrification of vehicles, fleets, and marine ports presents a threat to the grid, and as such it is crucial to bring chargers into the equation of energy demand and response systems. The combination of the OCPP with the Open Automated Demand Response (OpenADR) protocol or the Open Smart Charging Protocol (OSCP) turns a charger into a flexibility provider that can react to changes in demand response (DR) within a distributed energy resource (DER) energy ecosystem. Accordingly, an uninformed charging process can be converted into a smart technique, which is able to throttle or postpone a charging process based on currently and locally available grid capacity.