In a study exploring the effects of a particular drug, the hypothesis might be that researchers expect the drug to have some type of effect on the symptoms of a specific illness. 1  In psychology, the hypothesis might focus on how a certain aspect of the environment might influence a particular behavior.
A 4 kW solar panel system will cost you between $10,000 and $11,500 to install. If you want to up the juice a little bit, a 5 kW system will cost between $12,500 and $14,000 to install.
Solar Panels Cost â $109,376. Solar panels are the most expensive part of a solar system, making up: 1  44% to 52% of the total cost. 2  Priced by $/Watt, but depends on the efficiency of the solar cells.3  Generally come with a 20+ year warranty.olar panels are the most expensive part of a solar system, making up: 1  44% to 52% of the total cost. 2  Priced by $/Watt, but depends on the efficiency of the solar cells.