For existing homes, energy efficiency often has a better return on investment than solar. Looking for an investment with a high, secure return on investment? A light energy efficiency retrofit of a typical existing home can deliver a whopping 18.5% return annually, nearly double that of long-term stocks. It’s also a much higher return than that of residential rooftop solar, though they both deliver complementary cuts in carbon emissions that are necessary to address the climate challenge. Ideally, homeowners will combine energy efficiency and solar, using the former to reduce energy demand and improve comfort, and then adding the latter to serve the now-smaller power load. If their budget is limited, though, homeowners will often get a bigger bang for their buck by prioritizing efficiency. We documented this finding in a recent blog post and paper by ACEEE’s Chris Perry about new home construction.
ACEEE 21st May 2019 read more »