Lower-costs technologies will make zero net energy buildings more feasible in the near future.
Remember December 4, 2013, in terms of your commercial building and its potential to achieve zero net energy (ZNE). This is the date that Solar City began offering a 10-year lease for its Tesla-based battery technology to commercial businesses. The leases financial attractiveness is its guarantee of a 20 percent reduction in a commercial buildings kilowatt (kW) demand.
In many electric utility rate designs for commercial buildings, the demand charge can account for up to half of the total monthly bill. Solar Citys lease, which guarantees a performance result, allows a business to avoid a significant upfront cash investment while still realizing positive cash flows when the monthly lease payment is lower than the electric bill savings achieved by reducing kW charges.
Offerings like Solar Citys that supply both advanced technologies and guaranteed financial results are the first wave of a ZNE-technology revolution that will reshape your hotel, store, office building or warehouse into a smart building. Previous articles in this three-part series reviewed the technologies that enable ZNE buildings and the financial impacts ZNE technologies will have on commercial real-estate valuations and cash flows. This article outlines the three steps for turning your commercial building into a ZNE building.
What Is a ZNE Building?
A ZNE building produces onsite renewable energy equal to the buildings annual energy consumption. Achieving this result is more than putting solar panels on a buildings roof. ZNE buildings are designed using a pyramid approach of progressively investing in least-cost technology options that combine to achieve ZNE results.
The ZNE technology revolution is being driven by market-disrupting price declines in these technologies as they grow their economics of scale. Californias 2014 launch of revised building codes will accelerate this economies-of-scale path toward price competitiveness by creating demand for ZNE technologies similar to how California drove down rooftop solar panel costs through the states Million Solar Roof initiative. Californias efforts hold the potential for ZNE building technologies to achieve economies of scale that will make them affordable to commercial businesses across the U.S.
Electric Utilities and ZNE Buildings
Your ability to design a ZNE building will be influenced by your electric utility. Some utilities will align with this technological wave and serve their customers in a manner similar to how Amazon and Google provide Internet cloud services. Customers served by these utilities will be able to buy and sell energy through their utility and view the grid and their utility as a valued resource.
Other utilities will create or maintain barriers to their customers adoption of ZNE buildings. These utilities do so at the risk of generating a future customer rebellion when the price and operational ability of ZNE buildings are competitive with the grid. Until this crossroads is reached, customers served by these utilities will be limited to investing in energy efficiency and intelligent building technologies that form two of the legs of the ZNE technology stool.