it could have a supercapacitor to collect the sun's energy and then we could use that to power the earth (or a country's) energy needs?
how big would it have to be?
Also, the mass of biggest satellite we can launch now is only about a hundred tonnes (less than a boing 747), if it goes to a low orbit and it is much smaller if it has to go higher. With a back of the envelope calculation, you can store about 6 million batteries there. For comparison, the population of New York is 8 millions, so you can give them less than a battery to each one of them.
And increasing the mass of the satellite or the fuel amount, makes the fuel in the launching rocket much much much bigger. https://en.wikipedia.org/wiki/Tsiolkovsky_rocket_equation
Perhaps you can try to gain some intuitive idea about satellites playing the Kerbal Space Program game: https://kerbalspaceprogram.com/ The simulation is not totally accurate, but it's good enough and there are some mods to increase realism later.
(It's also not easy to store the energy for 6 months. Try storing a charged rechargeable battery for 6 month and using it.)
Note: This look like a nice question for https://what-if.xkcd.com/ You can try submitting it there.
You could put a solar collector into earth's orbit so it would always be in the sunshine and <transfer the energy in some way>. However no one has a way of making this seem economic.