The KS line of solar pump stations serve as the circulation system for transferring the heat drawn from the collectors via heat transfer fluid to the storage tank, working in conjunction with the control to maintain consistent high-efficiency. These compact units are completely integrated packages and come with all the operational and safety devices required for a reliable solar thermal system.

The Bosch KS pump station is designed for one solar storage tank. For two tanks, two solar stations can be combined in one system. This arrangement provides two separate return connections with separate pumps and flow limiters. This enables the hydraulic balancing of two storage tanks with different pressure drop values. Another application of two pump stations in one system is the implementation of a solar system with two collector arrays in different orientation (east/west control). Here too it is important to have two separate return connections with separate pumps and flow limiters.