* connect your solar to the grid, sell off the excess (default for larger installations)
* connect your solar to the grid, donate the excess to the grid (easier from the paperwork perspective, doable for very small installations)
* have an "island" installation that's not connected to the main grid, move some devices to that island (you need two separate circuits, need to manage which device to put on which circuit)
* go fully island / off-grid (you only need one circuit, but need battery and enough power generation to go through the winter all by yourself)
The first two are definitively easier, the latter two only for real tinkerers / enthusiasts. So unless you count the latter two, the alternative to selling to the grid is donating the excess to the grid.