One of the most difficult solar energy design problems to solve is:
Ahow to collect the sunlight
Bhow to transform sunlight into heat
Cstoring the heat energy
Ddifficulty in using the energy
One of the most difficult solar energy design problems to solve is:
Ahow to collect the sunlight
Bhow to transform sunlight into heat
Cstoring the heat energy
Ddifficulty in using the energy