The shore to ship power connection is a technology that has been recommended as one of the ways that will help reduce emissions from marine vessels which have increased in number as a result of rapid growth in international trade. The interconnection of marine vessels at berth to an existing shore power grid has raised concerns to system operators and regulators regarding the system’s stability because the on and off addition of loads to the network leads to fluctuations on the voltage stability of the system. This paper analyzes the dynamic voltage stability response of the Kenyan coastal power system interconnected to an off-shore load before and after the connection of automatic voltage regulators (AVR) under a three-phase fault. A static synchronous compensator (STATCOM) was introduced to assess its effectiveness before and after the ship load increase. The results showed that before the off-shore load increase, the AVRs are able to provide enough compensation to the ship motor loads. However, after increasing the load, the system experiences voltage collapse but the application of STATCOM in the system will help prevent voltage collapse.