Scaling small units up is not an issue. Just use multiple of those units. Much like a car battery can consist of thousands of individual cells.

Scaling large units down, however, can be a challenge with limits. So I would say finding a thing which works well at small scales is gold. If you want more, you're free to either house multiple units in one building, or distribute them along the shore. Although it may well be possible that another design is more beneficial at other scales.

It's also interesting for mobile use cases like naval vessels. I could even imagine some road train truckers having one of these in their emergency gear when crossing deserts, just in case.