In this task, you are given a paragraph, and your task is to construct a question from the given passage. Construct question in such a way that (i) it is well explained in the paragraph, (ii) the words may/may not be present in the paragraph, (iii) it should start with what/how/describe. Avoid creating a question that (i) is just relevant to one or two sentences, and (ii) not relevant to passage. 

Solar panels are made up of two types of silicon. Sun shines on solar panels. Sunlight goes into the top half of the solar panel. Sunlight travels into the bottom half of the solar panel. The "jump" between the two halves can be used to make direct current. A solar "inverter" changes the direct current to alternating current. Alternating current can be used to power things in your house. 
How do solar panels generate electricity?