Very cool Mouch and I agree if you can use 12V or 24V directly the system can remain much simpler (we have the travel trailers on our property entirely powered by a PV system but we do use an inverter for some 110V applications).

The only downside of using a load controller that a pond's dissolved oxygen is lowest in the early morning hours in the summer and, accordingly, many folks run their aeration systems at night during the summer.

My post is in no way meant to discourage you though, please take photos and create a thread when you design and implement your PV aeration system - we all learn from projects such as this.

JHAP
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"My mind is a raging torrent, flooded with rivulets of thought cascading into a waterfall of creative alternatives."
...Hedley Lamarr (that's Hedley not Hedy)