Modular static transfer switches

A method of operating a modular static transfer switch including a plurality of solid-state switch modules installed therein, each of the solid-state switch modules including at least one solid-state switch, the method comprising:

• operating a first plurality of the solid-state switch modules coupled in parallel between a first power source for the modular static transfer switch and a load, wherein the at least one solid-state switch for each of the first plurality of the solid-state switch modules selectively connects the first power source to the load;
• operating a second plurality of the solid-state switch modules coupled in parallel between a second power source for the modular static transfer switch and the load, wherein the at least one solid-state switch for each of the second plurality of the solid-state switch modules selectively connects the second power source to the load;
• and
• collaboratively transferring the load between the first power source and the second power source by coordinating operation of the first plurality of the solid-state switch modules with operation of the second plurality of the solid-state switch modules.

A modular static transfer switch comprising:

• an output configured to couple to a load;
• a first input configured to couple to a first power source;
• a second input configured to couple to a second power source;
• and
• a plurality of solid-state switch modules each comprising at least one solid-state switch and a controller configured to operate the at least one solid-state switch,
• wherein a first plurality of the solid-state switch modules are coupled in parallel between the first input and the output, each solid-state switch module of the first plurality configured to selectively couple the first power source to the output using the at least one solid-state switch,
• wherein a second plurality of the solid-state switch modules are coupled in parallel between the second input and the output, each solid-state switch module of the second plurality configured to selectively couple the second power source to the output using the at least one solid-state switch, and
• wherein controllers of the first plurality of the solid-state switch modules communicate with controllers of the second plurality of solid-state switch modules to collaboratively transfer the load between the first power source and the second power source.