Optimized PV-coupled battery systems for combining applications: Impact of battery technology and geography
journal contributionposted on 08.07.2019 by A. Pena-Bello, Edward Barbour, Marta Gonzalez, M.K. Patel, David Parra
Any type of content formally published in an academic journal, usually following a peer-review process.
Interest in residential batteries to supply photovoltaic (PV) electricity on demand is increasing, however they are not profitable yet. Combining applications has been suggested as a way to increase their attractiveness, but the extent to which this can be achieved, as well as how the different value propositions may affect the optimal battery technology, remain unclear. In this study, we develop an open-source optimization framework to determine the best-suited battery technology depending on the size and the applications combined, including PV self-consumption, demand load-shifting, demand peak shaving and avoidance of PV curtailment. Moreover, we evaluate the impact of the annual demand and electricity prices by applying our method to representative dwellings in Geneva (Switzerland) and Austin (United States). Our results indicate that the combination of applications help batteries to become close to break-even by improving the net present value by up to 66% when compared with batteries performing PV self-consumption only. Interestingly, we find that the best-suited battery technology in Austin is lithium nickel cobalt aluminum oxide (NCA) as for Geneva lithium nickel manganese cobalt oxide (NMC) batteries reach in average a higher net present value than NCA-based batteries. However, NCA-based batteries could be a more promising alternative when applications are combined.
This research project was financially supported by the Swiss Innovation Agency Innosuisse and is part of the Swiss Competence Center for Heat and Electricity Storage (SCCER-HaE) with the following grant number: 1157002526.
- Mechanical, Electrical and Manufacturing Engineering