If you haven’t heard, the California Public Utilities Commission (CPUC) is pushing for all new residences to consume zero net energy (ZNE, aka net zero) by 2020. ZNE homes produce at least as much energy as they consume, on average, over the course of a year. The push is just a goal for now, but is very close to becoming a mandate in the 2019 building code cycle, according to a CPUC consultant.
Solar is usually the power source of choice for NZE, but that still leaves many California homeowners with questions. How does this push affect the size of the system you’ll need? How about for ZNE retrofits? Let’s look at how this building trend might affect your choices when it comes to solar.