!! oh wow, they actually support the full open-circuit voltage that my panels can be series linked* to reach! the only thing i saw many years ago was like... the power wall!
Not only that, it can run every panel i currently own all by itself. that is a leap forward, compared to the last time i checked (a decade ago or so, it was depressing to want a separate solar grid, you need the grid tie stuff so you can run your house if the power goes out, but i mostly wanted the solar to manage water and lights and if possible, the small window/wall aircons that i use to keep servers cool.
https://eg4electronics.com/wp-content/uploads/2024/04/EG4-18...
Max output is 50A, so it should be plenty for your pump and mine. You can also chain them together if you want huge battery capacity.