First of all, it is necessary to make clear the premise that charging piles are the basic service facilities that follow electric vehicles on the road.  

Secondly, the charging pile is the charging application terminal attached to the parking space and the power grid.  

With these two backgrounds, we can basically answer your question.  

1. The capacity of charging piles increases with the growth of the number of electric vehicles, the number of parking Spaces and the capacity of the grid. If any of these three aspects are stagnant, the capacity of charging piles will be stagnant, just like the bucket principle, which is always determined by the shortest board.  We all know that the number of parking Spaces and the capacity of the grid are expanding every year, and the growth rate is also very stable. If we consider whether the charging pile will be saturated, we mainly depend on whether the growth of electric vehicles will be planned.  

2. The technical threshold for the production of charging piles is not high, and the main difficulty lies in the combination of equipment and operation. The measurement of charging piles should not only see whether a single device can be charged, even if it is high-speed charging, but also whether the device can form a basic service based charging network after being connected into a cluster.  Such a technical threshold is very low, most electrical, power manufacturers can do.  Therefore, the charging pile market will not be in short supply. However, in order to build a charging network with clear planning and clear goals, the equipment and system that can support the network are scarce. Intelligent charging enterprises that do well in this aspect can pay attention to them.  

3. Regarding the question of profit margin, this cannot be answered simply. Charging pile is still oriented to B-end products, and B-end products are characterized by customization and non-uniform pricing, which is the biggest difference from C-end consumer goods.  For B end products, different customers will have different prices and profits. This is not the so-called profiteer's meeting people and ordering dishes. It is mainly calculated according to the detailed needs of Party A.