Today I Learned

Maybe. The point of vertical biracial panels is less need for batteries, or counterbalance generation. When you look at the system as a whole, it may be simpler and cheaper over everyone installing panels with a strong peak in the afternoon when no one is using it

I missed that azolla could fix nitrogen, knew that about duckweed but azolla is not my strength to be honest. However the question still remains, where would you get the potassium and phosphorus required to grow the azolla? All 3 of your examples involve continually harvesting azolla and not getting the nutrients back in. You could add chemical fertilizer to grow azolla into organic fertilizer but that would be kinda dumb wouldn't it? Not to say that hasn't been done multiple times before, looking at you alfalfa fertilizer pellets.

In a way wood is a great way to produce biochar because nearly all the nutrients in the tree are in the leaves and the branches. When harvesting wood we only take the trunk. This means we can grow wood generation after generation and we don't have to use fertilizer. The same is not true for something like azolla. A good setup to make it cyclical would be to put the azolla right next to the animal farm whose animals are fed the azolla. And use the manure to grow azolla. However then I wonder if the hygienic quality is acceptable.

Duckweed works better for animal feed since it produces far more biomass and protein per day although azola is still pretty good. Thx problem with both is dewatering and getting high enough consumption. It works as an additive but certain animals don't like to eat pure azola or duckweed. Processing it into protein concentrate helps out though so you can feed far more to animals that would otherwise start refusing rations made with too much of either.

One thing worth thinking of would be a cooling jacket on the back of the solar panels that also heats the pond water. That makes the panel's more efficient, only needs a small electric pump to circulate it, and makes the pond plants grow faster when it's cold or even allowing them to be productive in the winter in certain places?

You can feed the azolla waste water from a fish farm for sure. But then what do you feed the fish? The nutrients always have to come from somewhere and they have to end up somewhere. If you're simply dumping azolla in a mine somewhere as carbon storage that then turns into a huge waste of nitrogen, phosphorus and potassium. It's a very nutrient dense plant.

Happy cake day, and yes, both. Carbon sequestration and animal feed.

While there power per panel surface is lower, the timing of peak outputs is an excellent complement to standard solar. It has maximum output in the morning and evenings, when people want to run home appliances etc, rather than at midday when they are all at work.

yeah i'm well aware of that. the problem is more that you can more effectively shift power around from midday to evening and morning with batteries.