> would be easier to build on Mars given the significantly lower gravity.

In one sense yes, but in another sense no. Consider erosion. It is the bane of existence for any system near the ocean. Mars has a similar problem with dust, which is smaller than what we see on Earth. This shreds electronics and other instruments on Mars. Sealing becomes far more important, but also more difficult. The other thing we need to recognize is that on Mars there's no electric ground.

So yeah, on surface things look easier but there's a reason why including domain experts in the conversation is necessary. This is a classic example of napkin modeling being representative of how things will work in reality.

So look to the domain experts. They've used solar and nuclear for a reason. Maybe dig into why those were the choices made.