A surface aerator to me means something like this:
But I don't know of any of those that are solar.
Those are typically used for shallow ponds, less than 6 feet deep or so.
If you are talking about a solar bottom diffusion aeration system, you will need to find one with batteries that will also run at night. Night time aeration is more important than daytime aeration.
If there is grid based electric available anywhere within 1/2 mile or so, you could trench in a plastic poly line that was 1"-1 1/4" dia from the compressor to the pond, then split off to different areas of the pond from there.