Microtransat attempt

Myself and a small team are currently working on a microtransat entry for next year. The hull design is almost complete and we are looking to pair a high capacity LiPo pack with around 200W of solar capacity. We are in the process of finalising the drive for the vessel. It’s currently between a custom made magnetic coupling or a T200 thruster. For simplicity the T200 would be great but we have concerns on longevity of the T200 on what could be an 80 day voyage.

Is there any history of long duration missions using the T200 or bench test data in seawater? Any thoughts or advice would be much appreciated, our expertise is in naval architecture and software development so we have a bit of a gap on mechanical drive knowledge!