Using solar energy is the optimal thing to save energy usage,as it converts light energy into eclectic subsequent energies.Humanity is indeed intellectual to conceive of this,in blueprint,and then it is invented to suit all families.
One demerit is that you could not use solar energy in the night,and what would transpire if each family must buy this mandatory solar panels?Isn't the future night un-befitting?
Humanity should perceive twice of whether solar energy is needed for all families.It's needless to invent it,in retrospection,as why wouldn't humanity terminate pollution first?Human living in the world should help to save the Earth,each of us.
When humanity invent these solar panel,solar cars,and the like,some chemicals is a dearth,and reputedly it would be prohibitive,like a million for a big and productive engine.
If the family has unsufficient money,then what are they for?