Solar Routine
The headline advantage is simple: sunlight keeps the skimmer working, and the backup DC charge extends runtime when the weather turns. That matters because a pool skimmer only earns its place when it reduces daily effort, not when it becomes another thing to plug in and manage.
The practical upside is a cleaner surface with less manual intervention. The downside is that the whole routine depends on the pool being a good match for a solar surface robot, so the more your pool fights that setup, the less compelling the convenience becomes.