What is the main conflict in The Boy Who Harnessed the Wind: Creating Currents of Electricity and Hope by William Kamkwamba?

This book is the inspiring autobiography of a Malawian teenager who, in spite of the challenges posed by drought, famine and poverty, designed and built a functioning electrical system in his family home and, as a result, became internationally recognized for his innovative work. As the narrative details the determination with which young William Kamkwamba struggled to make his dreams a reality, it also explores themes related to the value of friendship and the tension between magic and science.