You're right about nuclear (though, if we can get hydrogen fusion to be profitable, that won't even be stellar in the way that fission is). Tidal energy isn't

You're right about nuclear (though, if we can get hydrogen fusion to be profitable, that won't even be stellar in the way that fission is). Tidal energy isn't solar in any sense. It's harvesting momentum which in turn is generated by some combination of gravity and the Big Bang. Geothermal energy isn't solar. It's harvesting heat, which apparently comes from three sources: heat from the planet's formation, caused by gravity, heat from friction from deep-interior motion, and heat from radioactive decay. Only the last of these is even stellar, and none are solar.