Final answer:
Solar energy is more common in households because it is becoming less expensive. Decreased upfront costs and the ability to connect to the electrical grid make it a viable option, and advancements are expanding accessibility.
Step-by-step explanation:
Solar energy is becoming more common for household electricity use primarily because it is becoming less expensive. The significant decline in the price of solar technology, which includes solar panels and the systems that support their use, has made it more attainable for homeowners. As the upfront costs decrease, the long-term benefits become increasingly appealing given the potential savings on electricity bills and the shift towards renewable energy sources.
While other renewable energy solutions have faced challenges like intermittency and higher upfront costs, solar energy advancements have continued to make it a competitive and viable option. The ability to tie solar systems to the regional electrical grid also alleviates concerns about energy use when the sun isn't shining, diminishing the need for expensive battery storage systems. In addition, research into thinner, more mobile materials for solar cells is expanding the accessibility of solar technology, especially in remote locations.