I want to make a power supply system. Below is a block diagram of part of it. Batteries A and B form a battery pack, one is charged and one is discharged, K1 and K2 control which one discharges. The output 24V can be directly output to the outside. K3 responds to the 220VAC demand that may arise, and K4 makes a switch to control the on-off and protect the inverter. The switches are all preliminarily set as solid state relays, and the input terminal is controlled by a single-chip microcomputer. But now there is a problem: Can the three solid state relays K1 or K2, K3 and K4 be connected in series like this? The solid state relay I bought requires 5-220VDC at its output. Worried that some relays will not work? For example, there may be no voltage on both sides of K4. . The two output pins of the solid state relay are the drain-source end of the MOS tube, so will there be any influence on the series connection of the front and rear drain-source ends?