The survey results are;

 The responses were :

1. all the house
2. I hope
3. trying to find something good and cheap
4. maybe
5. yes
6. I think I have to  
7. I would like to install it for TV and AC
8. Why not it's an important thing nowadays because we are affecting the environment badly
9. For the heaters

 The responses were :

1. need cleaning
2. unreliable in cold places
3. high cost
4. it's low efficiency.
5. only works when it is daytime and sunny
6. They look ugly
7. expensive
8. The cost. Also it depends what country you live in
9. It's expensive and it needs large places to set it up and it need experts to install it
10. Not as efficient  
11. the large area that they take
12. expensive

 The responses were :

1. phone chargers
2. lamps
3. lights
4. air conditioner
5. garden lights
6. I have used lights to reduce the amount of using the electricity