Solar power for a shed

[shilparamam]

Your plan is great, but use your GOVT subsidy plan for saving some cost in Green Energy. Their is nothing new or like a different system, as we need the panels with solar charge controller that provides electricity to the connected devices.
This all depends upon the wattage and usage also number of hours your requirement. I would suggest use a DC Fan than an AC fan this could be much better for Solar Panels.