- Original article
- Open Access
Prosumption and the distribution and supply of electricity
© The Author(s). 2016
- Received: 10 February 2016
- Accepted: 4 August 2016
- Published: 24 August 2016
Increasing numbers of households install renewable energy production systems like photovoltaic panels thereby contributing to a more sustainable energy system. Other developments, like in-home storage or peer-to-peer exchange within a neighbourhood, also contribute to the transition. This paper explores the emerging rise of these prosumers of electricity and its implications, in particular for grid management and electricity supply in the Netherlands.
With the help of an agent-based model, we illustrate the evolution of prosumption in a small Dutch-oriented residential community in five scenarios. The second part of the paper discusses the implications of the modelled rise in prosumption.
Depending on the number of prosumers, combined with storage and peer-to-peer supply, we found a share of prosumption in this local community of about 28–30 %. The community will require less electricity from the central power plants. These model results also indicate that the management of the local network will become more important if more households become prosumers in combination with storage and peer-to-peer supply.
These trends affect current business models of DSOs and electricity production and supply companies. The latter are facing a loss of turnover which needs to be compensated by developing alternative business models. And, DSOs have to deal with the new needs on the local grid which also require an adaptation of their business models. Developing business models in cooperation with local energy communities could be an attractive alternative to explore.
- Residential storage
- Business models
- Electricity supply companies
- Electricity production companies
The organisation and functioning of electricity supply have changed dramatically since the liberalisation agreements among the Member States and the European Union’s (EU) enactment of the liberalisation directives in the 1990s. The electricity consumers experienced the changes in basically two different ways. First, consumers became able to freely choose an electricity supplier and to choose from a more diverse offering of products and services. For example, consumers can choose the most cost-effective supplier or choose a ‘green’ supplier that sells renewable energy, if desired locally produced. Second, consumers gradually moved into the position of themselves becoming an electricity producer as well as a consumer. The most prominent example being households installing solar panels to (partly) produce their own sustainable energy. Both, choosing your electricity supplier and producing your own electricity, can contribute to the transition towards a more sustainable energy system. Prosumption, as it is called when consumers also become part of the production side of a product like electricity, was powerfully facilitated by a decline in the cost of photovoltaic (PV) technology , p9. According to the report of the International Energy Agency (IEA) , PV systems have initiated a prosumption trend enabling ‘… individual homes and businesses to invest in rooftop systems directly, based on economics but also on other possible motivations’ , p5. The report continues: ‘As a result of these trends, PV has been characterised as a “disruptive” technology which could revolutionise the utility sector just as personal computers and cell phones changed their respective industries’ , p5. According to assessments by the International Energy Agency , about 25–35 % of the global PV capacity is installed at the residential level. In the Netherlands the total amount of electricity generated by decentralised PV systems has increased tenfold between 2000 and 2014 . It is predicted that power produced with residential PV systems will soon be or is already equally or less expensive than power produced centrally. According to some, this grid parity has already been reached for the Netherlands [3–6] but others think it might take another decade or more . The growth of the number of PV systems in the Netherlands has been subject to variation due to changing subsidies . However, we should not only focus on financial motives, also environmental reasons motivate households to choose renewable energy . Other factors also influence the choice of households for PV panels, for example, the awareness and knowledge of the technology .
While the number of roof-top solar panels is increasing, the local exchange of electricity is still under development. Currently such an exchange is not supported in the Netherlands but (virtual) exchange is currently pilot tested in several projects, for example, in the well-known Powermatching City project .
Finally, also local storage is getting more attention recently. Two examples: ‘Large scale lithium-ion batteries for energy storage are expected to become much more prevalent in 2012 as a result of technology advances and dropping prices’ . ‘To date, the industry has focused a lot of attention on grid-scale storage, but it is the massive opportunity behind the metre that will truly move the industry from fledgling to mainstream’ . Sharma and Galipeau  studied the cost effectiveness of both load management and battery storage systems for individual households with PV systems. Castillo-Cagigal et al.  included load management (they call it active demand side management, ADSM) in their simulations and experiments with a combination of PV, storage and ADSM to maximise self-consumption. Based on data of seven Belgian households with PV panels, Mulder and his colleagues  calculated the optimal size of a hypothetical storage considering houses connected to the central grid. They did not strive for autonomy of the households but optimised the size of the battery to cover most of the electricity demand or to cover the peak power. Besides academically interesting, using battery systems to increase self-consumption of a household is also taken up by commercial parties. For example the German firm E3/DC recently introduced such a system [17–20]. All three developments could be part of local energy community. Several such communities are emerging in the Netherlands and abroad. They want to be more sustainable and/or become independent of large energy companies . Residential photo-voltaic systems, storage facilities and peer-to-peer exchange can be part of a so called ‘smart grid’. An example smart grid definition is provided by the European Energy Regulators : ‘A smart grid is an electricity network that can cost-efficiently integrate the behaviour and actions of all users connected to it – generators, consumers and those that do both— in order to ensure economically efficient, sustainable power systems with low losses and high levels of quality and security of supply and safety’. In general, the term smart grid is used to cover a large range of characteristics but all consider the electricity grid and the application of information technology see for example . The development of smart grids is part of our transition to a more sustainable energy system . Self-consumption can assist that transition. Although they support the energy transformation, liberalisation and the emergence of prosumers pose new challenges to the business model of the energy supply companies and the distribution system operators (DSOs). Distributed generation is becoming increasingly precarious for the electricity production companies due to their favoured position in the merit order in many countries and the need to retain conventional fossil-based capacity as a back-up. This undermines the dominant business case in electricity generation. Companies are forced to reconsider business models . RWE, for example, responds with new models in ‘innovation hubs’ . Gsodam et at  found that Austrian energy companies are still focussing on large-scale renewable production. They also acknowledge the importance of small-scale local production and the need for utilities to develop new business models to deal with that.
For the DSOs, increasing prosumption requires a refocus of their position and function in the electricity system. In all European countries, however, DSOs are regulated due to their function as the grid manager, in a monopoly position. Therefore, anticipating dynamics such as prosumption is not only a matter of business strategy, but also of politics and regulation. Initiatives and publications by international organisations and forums show that prosumption and its implications for electricity supply and grid management are currently hot topics in both research and discussion. The implications of prosumption are far from clear yet, as is the response of the DSOs and the energy companies.
Previous research studying the impact of prosumption merely focused on more technical and financial issues. Aspects that are studied are for example the grid tariff in systems similar to ours: local generation with PV systems and in-home storage . Local generation reduces the amount of electricity obtained from the central grid and peak demand is not necessarily reduced because of local storage. Combined with a grid tariff that is largely based on the amount of electricity delivered centrally, this development does not reduce grid costs, but it does reduce the income of the grid company. This interesting article gives some possibilities for other grid tariff schemes. It differs from our approach in that we focus on a situation that includes peer-to-peer exchange and we further elaborate on business strategies for the energy companies involved. However, the model Jargstorf et al  presented could be useful to grid companies to study possible alternative grid tariff strategies. Our article on the other hand incentives them to study the impact of PV, in-home storage and peer-to-peer exchange on the demand of electricity itself.
A UK-based article by  compares local generation with PV and/or wind, at different locations. They do not include storage in their models; excess of locally generated power is directly fed back into the grid. Using this technology their model calculates a 47–73 % self-consumption. Pooling groups of consumers, like enabling peer-to-peer exchange, increases this number even further. Our model applies an extra technology, storage, but does not (yet) include different sources of local production which would be an interesting extension.
Other articles focus on residential or local storage systems. For example Wang et al.  focused on optimising the use of an in-home storage system combined with PV panels. Their goal was demand peak shaving which could reduce the household’s electricity costs assuming a time of use energy tariff. Also Kahrobaee et al.  studied the optimal combination of local storage and production. Their work included wind turbines instead of PV panels. Others not only include the household’s electricity bill but at the same time try to minimise investments required for the distribution grid .
Emergence of prosumption and impact on distribution and supply companies
The model we apply in this paper has three components: rooftop PV panels, peer-to-peer exchange of electricity and in-home storage. The model analyses the dynamic relation between these three components with the idea to see how it affects centralised grid based electricity production and consumption. This paper, therefore, adds to the debate on prosumption and its implications for grid management and energy supply by addressing and answering the following question: How could prosumption develop under liberalised market conditions and how would it affect the activities of DSOs and energy supply companies? The paper in particular addresses the impact of consumers producing, storing and supplying electricity peer-to-peer. We answer the central question in the following way. We first analyse the evolution of local electricity production and consumption with the help of an agent-based model (ABM), showing how prosumption at the local level might develop if the number of roof-top PV panels continues to rise, in combination with storage and peer-to-peer supply of electricity. Then, we reflect on possible implications of prosumption for grid management and electricity supply. The paper ends with some conclusions.
Simulating evolution of prosumption in five scenarios
This study considers a neighbourhood in which a number of households have rooftop solar panels and some of them also installed a storage system. Electricity produced by PV systems (the solar panels) cannot always be used real time by the household itself. This excess electricity can be delivered to the central grid, which is mainstream practice in the Netherlands at the moment. However, excess electricity could also be saved in a storage system, like a battery, and used at a later moment, for example during the night when the sun does not shine and the solar panels produce no electricity. With such storage systems, individual households become less dependent on the central grid.
We do not consider individual households or the distribution grid level but we focus on the community level. Besides residential PV and storage systems, our study also includes exchange of electricity within the neighbourhood. Electricity produced by the solar panels of one community member can be delivered to other members in demand for electricity.
Five prosumption scenarios
Preferred application of excess electricity
The first scenario represents current electricity supply where households can have PV panels for self-consumption in combination with central grid exchange but without storage capacity and peer-to-peer exchange with community members. In this scenario, all surplus electricity is fed into the central grid.
In the second scenario, households combine PV-based electricity production with storage. Electricity surpluses produced by the PV panels feed into a battery to a maximum charge, and then to the grid. Electricity consumption is first satisfied by real-time PV production, then the battery, and lastly, the grid. Households are still operating individually; no community exchange is included in this scenario.
The third scenario allows peer-to-peer supply of electricity among community members, but now, storage is excluded. This scenario allows us to explore the implications of prosumption at the community level. Peer-to-peer supply here means that surplus electricity, produced by PV panels, is delivered to neighbours demanding electricity. All users prefer peer-to-peer supply over supply by the central grid.
Scenarios 4 and 5 combine storage and peer-to-peer supply, allowing studying the interaction between household and community level. We first simulate a scenario in which prosumers prefer peer-to-peer supply over storage. In this fourth scenario, prosumers have a community orientation.
In scenario 5, households prefer storage over peer-to-peer supply, indicating a greater focus on individual independence from the grid compared to the community’s independence.
We developed an agent based model (ABM) which calculates the community’s electricity demand from the central grid or the community’s self-consumpion (= reduction in demand from the grid). Within this ABM, individual households are ‘agents’. Each household has its own characteristics like yearly electricity demand or capacity of their PV system. They follow simple rules in deciding how to fulfill their electricity demand. Electricity produced by PV systems is preferably used by the same household, excess production can be stored or shared with neighbours, depending on the scenario. From the behaviour of individual households emerges a behaviour of the community as a whole. This emergence is what we study. In the Netherlands, the number of residentially installed PV systems is growing rapidly . Also internationally, PV systems show a strong progression .
Our agent-based model simulates the evolution of prosumption in a community by analysing the degree of self-consumption under different conditions. The model assumes a varied number and capacity of PV and storage systems in the community. We define self-consumption by the community as electricity that is both produced and used within the neighbourhood, without interference from the central grid. The self-consumption of the community can be seen as a reduction in the neighbourhood’s power demand from the central grid. Our model shows that prosumption combined with storage and peer-to-peer supply increases a community’s off-grid electricity consumption.
All agents are community members and users of electricity, but some combine consumption with production (prosumers), storage or supply of electricity. Agents can therefore play different roles: Consuming electricity provided by the grid or by community peers (consumers with access to electricity) or consuming electricity by own production and storage. The model simulates the 24-h cycle of electricity production and consumption within the community. The Appendix provides detailed information on the model’s features, default values, assumptions and model runs.
After the presentation of the scenarios we discuss the implications of presumption for DSOs. This part of the analysis is based on observations in the market, literature and media coverage, with The Netherlands as focal point. So, here, the article basically reflects what is or might happen in the Netherlands if prosumption develops as simulated by the scenarios.
Five scenarios of community prosumption development
Modelled parameters with default value and simulated range
Average yearly demand
Number of users/community members
Share of users with PV system
Average capacity of PV system
3000 Wp (=3 kWp)
Share of PV systems with storage system
Average capacity of storage system
Storage level at start (= amount of energy in the battery at the beginning of the simulation)
0 % of capacity
The number of community members and the average capacity of storage systems turned out to be factors that hardly influence the self-consumption. Therefore, no graphs of these variables are included. Although both summer and winter conditions were simulated we focus in our results on the self-consumption during summer months.
Share of users with a PV system
While changing the share of community members with rooftop PV systems, the other parameters were kept at default values. An increasing number of PV systems increases the community’s self-consumption linearly in the first 2 scenario’s where no peer-to-peer exchange is allowed. In these scenario’s the community’s self-consumption is just a summation of the individual self-consumptions of the community members. The linear increase indicates that the electricity produced by the PV systems is consumed by the households in real time or stored in the household’s battery. Scenario 1 shows a slightly lower self-consumption compared to scenario 2, indicating the increased self-consumption when storage facilities are applied. In the other scenarios, the increase in the number of PV panels in the community increases the community’s self-consumption, but the effect is levelled off at higher PV system penetration. When almost all households in the community have installed PV systems, exchanging energy within community is no longer possible, since households produce enough for themselves. Scenario 3 results in a lower self-consumption than scenarios 4 and 5 since no storage of excess electricity is possible. The figure also shows that in scenario 2 the levelling off is more pronounced, which is a result of the lack of storage.
Average capacity of PV system
Comparing Figs. 1 and 2 reveals that increasing the number of solar panels in a neighbourhood increases the self-consumption more severely than increasing the capacity of these panels to 20 % (default value for share of users with PV systems) of roofs.
Share of PV systems with storage system
Storage level at start
(= amount of energy in the battery at the beginning of the simulation).
Comparison of the five scenarios
Numerical results of the simulations showing the community’s self-consumption during a summer’s day
40 % users with PV systems
6-kWp average PV capacity
600 community members
50 % of PV systems also has storage
8-kWh average storage capacity
Half-filled battery at start of the day
Although we did not previously include simulation results for changing the number of community members or increasing the capacity of the battery, these results are included in this table. Doubling the size of the community, from 300 to 600 members, does not change the self-consumption values of the default situation. The same holds for the average storage capacity of the batteries.
When considering a doubling of simulated global parameters, a maximum community self-consumption of 28 % has been found. This maximum was reached in scenarios 4 or 5 when 40 % of the households implement a residential PV system (Table 3, third column, last two rows, grey shaded cells). We believe this situation might become a reality in the near future since rapidly increasing numbers of households are installing PV systems, inspired by environmental and/or financial motives. If this trend continues, central energy companies might be faced with a decline in sales of almost 30 %. This brings us to the second topic of the paper, the implications of self-consumption for grid management and electricity supply from the grid.
Implications of prosumption for grid management and electricity supply
The rise of prosumption as simulated in the previous section confirms IEA’s expectation that prosumption will develop a share of 25 to 30 % in the coming decades. This is already indicated by a simplified simulation model, as we used in the previous section. Under the condition of peer-to-peer consumption combined with local storage, a community might develop a prosumption share of about 28 %. One of the implications of this is that the management of the medium and low voltage distribution network becomes more important in the overall management of the electricity grid. This trend is visible in the five scenarios explored above.
The five prosumption scenarios explored in the previous section have consequences for the prosuming individual household (PV owner), the community, the energy supply company, and the DSO. In all five scenarios, the DSO needs to pay more attention to managing the local (community) grid. The scenarios show that the local focus of the management depends on the prosumption options chosen at the local level. In the first and second scenarios, the local-central interface is a central focus of grid management, due to the production and storage of individual prosuming households. In the other three scenarios, the local grid management itself becomes important due to the involvement of the community. Balancing the local grid, due to peer-to-peer supply combined with individual local storage, becomes the first focal point of the DSO with the central grid as exchange and back-up option. This could mean that prosumption will affect the dominant centralised design and functionality of the grid and the associated cost-of-service DSO business case. The cost-of-service business case, which is still dominant, charges for the usage and services provided by the grid. This model erodes if the number of prosumers increases, because fewer households use the grid, or else they use the grid only incidentally as back-up. Hence the transportation costs need to be shared by fewer users and this might initiate a death spiral. The more prosumers there are, the fewer grid consumers and the higher the transportation costs for the remaining group of consumers, if the ‘cost of service paradigm’ in transportation persists. In the Netherlands the transportation costs are socialised, meaning that every consumer in a certain area pays the same tariff for electricity transport and transmission. However, the costs of transport will increase for those who continue to be served by the grid when the number of prosumers increases. If this happens, the central grid might become over-sized, which raises the question for grid companies of how they are going to deal with this challenge in the longer term and how it will affect their longer-term investments in order to avoid disinvestment. In other words, prosumption might lead to what is called the ‘utility death spiral’, referring to the mechanism that fewer and fewer consumers will face ever-increasing transportation costs, motivating more consumers to become prosumers . Dutch grid operators have recognised this risk and reconsidered their role and function in the future energy system. Currently, they are grid operators and in this role they anticipate prosumption by providing additional services to neighbourhoods, such as storage and demand flexibility. Given the signals from the market, grid operators feel they could play a more active role in facilitating the Dutch energy transition, but here they face legal restrictions with respect to their function and authority.
There are, however, indications that the functionality of the grid might get a new impulse from E-mobility . This report estimates that the increase of E-mobility and electrical vehicles will only be possible with a strong, effective but also smart, centralised grid. The smartness is needed to coordinate the charging of the vehicles. At the same time, the report questions the storage capacity of E-vehicle batteries, because this is financially less attractive than back-up capacity from the grid. Veldman and Verzijlbergh  argue for the use of electric vehicles (EV) as a balancing medium for the network with new tariff structures. She uses the example of an EV owner who pays more for rapidly charging his car any time he wants compared to an EV owner leaving the timing and speed of charging to the DSO or supply company. Electric vehicles as well as our modelled parameters: local production, residential storage and peer-to-peer exchange can be part of a so called ‘smart grid’.
New developments, leading to a smart grid, require that all parties change their behaviour, including consumers and prosumers. Scholars suggest further research into behavioural change, looking for instance at the context and contingencies that keep electricity consumers in existing routines or getting them out of their routines . Financial incentives from new tariff structures might challenge consumers to change their behaviour. This, though, requires consumers to adapt to differentiated price signals. Prosumers therefore not only need to open up to the communication technology of the smart grid, but also to the incentives of dynamic electricity pricing . This means that it is necessary to integrate flexible demand and supply, in particular at the local level. This opens the way for DSOs to develop new products and services, in particular in facilitating an effective balance between local production and local demand. For instance, storage provides opportunities to manage grids more flexibly and efficiently. Area-based storage capacity could be a new future service of a DSO, a service that is currently being explored and tested in pilot schemes in the Netherlands .
Apart from developing and offering area-based grid balancing at the local level, the grid manager could also offer expertise to local actors developing a position as prosumer, or develop new modes to organise production and supply in local communities. Research in the Netherlands, initiated by the distribution grid operators, shows that local energy communities challenge the grid company to develop services such as interfaces, web portals, accounts, and administrative procedures, which could facilitate a sustainable local energy supply, rooted in the local community . DSOs can and should play a more dominant role here, in particular also by encouraging and facilitating electricity saving and efficiency improvements. There are several examples of this in the Netherlands, such as the Buurkracht initiative of Enexis, supporting and facilitating neighbourhood energy savings. This service portfolio could also include collective facilities for storing electricity by, for instance, power-to-gas storage and ‘the neighbourhood battery’. But, here, the challenge is not only technological but also social. More members of the community should be encouraged to join the community energy system and adjust their energy behaviour to help optimise the community’s energy balance. But, changing electricity consumption to match real-time local solar electricity production requires motivation to change consumer behaviour . However, in the Netherlands, only a minority changes its behaviour motivated by ecological considerations [42, 43].
Prosumption opens up the need to reconsider the current consumer segmentation in electricity supply. Prosumption and its development potential require differentiation and flexibility in the grid connections and grid tariffs. DSOs in the Netherlands are now developing financial market models to connect to the changing electricity market to maintain the grid as a reliable and affordable backbone, and to offer flexibility in price and connection to the grid, etc. The development of telecommunication tariffs may serve as an example for electricity supply. In telecommunication the tariff basis developed from hardware to service-based tariffs. Consumers buy capacity rather than paying for a connection to a copper line or a network. Electricity tariffs could develop similarly, by charging for transport capacity instead of grid connection . Capacity tariffs will probably provide a far better match between the load profile and the flexible needs of prosumers. The grid also requires capacity tariffs as an incentive to deal with the poor flexibility of the physical grid. Flexibility in the electricity supply market—for example to deal with extreme weather conditions, sunny days and high winds, which provide extreme peaks in energy supply—requires maximum storage capacity in the grid to accompany the volatility in electricity supply (and demand): an expensive technology for which the customer connected to the grid will have to pay. An intermediate step could be to differentiate and regulate grid usage for peak and non-peak periods on the grid. Prosumption could, for instance, only be allowed to deliver back to the grid outside peak periods. However, here the divergent interests as between the electricity supply company and the DSO might result in suboptimal shifts in electricity demands .
Prosumption also affects the business model of the incumbent electricity production/supply company. If the assessment of 25–30 % of the household consumers moving to prosumption is correct, then the company might face a revenue erosion of the same magnitude if it should fail to find alternative load, for instance in the industrial segment of the market. A second problem the electricity production/supply company is already facing in Europe is the merit-order effect of renewable-based distributed generation, which seriously affects the business model of incumbent providers. Renewables, including the excess production of residential/community PV panels, are seriously challenging the conventional cost calculation methodology in electricity production, the energy-only market model based on clear price signals. The effect is that incumbents shut down power plants because they are unable to cover the costs of running the plant and earning a return on their investment. The merit-order effect also disturbs investments in new, large-scale production capacity.
All the implications of prosumption sketched out above seriously challenge the regulation of electricity supply. Responding this challenge is no longer a matter of revising current regulatory approaches by improving the price signals in the market  or educating the consumer and the prosumer in market participation . Both are needed, but that will probably not be enough to really deal with the challenges of future electricity supply when prosumption has matured. In fact, prosumption challenges the existing conception of electricity. Under a monopoly system, electricity was considered a collective good and regulation was organised accordingly. The public interest was the optimisation criterion under monopoly regulation. In the market, electricity is considered a private good with individual profitability and efficiency as the optimisation orientation of regulation. Prosumption adds a new optimisation orientation, which is community interest. This is not all, however. The increasing diversity of energy resources used for electricity generation, as well as the increasing need for storage capacity due to the intermittency of renewables, brings new dilemmas for regulation. This has been clearly shown in recent research [46, 47]. Nykamp clearly revealed the regulatory dilemmas of storage capacity and investments in distribution grids. In storage, balancing the grid (collective good) is in conflict with the private interest of earning money from storage capacity. The same goes for investments in the distribution grid. The private interest is not to invest in more copper lines to handle peaks, whereas the public interest is investment in smarter energy systems . The regulatory dilemma here is what should be the regulatory orientation for optimisation? Which products and services should be provided by the market and which by the regulated transmission and distribution? Facing these questions only in theory becomes harder and harder in today’s highly dynamic electricity market. For that reason the Netherlands offers opportunities to explore and test the challenges under controlled real-life conditions in experimental settings. These examples show that prosumption and its implications present us with a challenging new research agenda since the phenomenon of prosumption itself as well as its implications have been subject to hardly any scientific research. In the science direct database ‘self-consumption’ appears much more often in the title, keywords or abstract. While until 2012 the number of such articles remains low (less than five a year), the last 3 years show an increase up to 30. The research agenda on this subject is clearly rising but still rather low.
The simple model applied in this paper is meant to illustrate possible effects of the combination of increasing application of residential PV systems, in-home storage possibilities and peer-to-peer electricity exchange in a small neighbourhood. We realise the limitations of our simple model. Several developments not yet included in our model can increase or decrease the community’s self-consumption. For example, real-life battery characteristics will reduce the overall effect and the introduction of load-flexibility can increase the amount of power produced and consumed within the community without interference from the energy company. This last development is getting more attention in smart grid pilots in the Netherlands. Time of use tariffs for electricity try to persuade households to change the timing of their electricity consumption.
Other physical aspects might influence the actual self-consumption of a community. The layout of the grid can prevent direct peer-to-peer energy exchange. Currently all houses in a neighbourhood are connected to a distribution station which has a limited capacity. Future alternative layouts are possible.
Although the current paper focusses on electricity, it is important to mention the exchange of different forms of energy as well. At the moment, most houses in the Netherlands use natural gas for heating and fossil fuels for transportation (car). The clear distinction between the different forms of energy used for different purposes is fading. For example electric vehicles are rising and μCHP (combined heat power) systems are being introduced. These developments will influence the self-consumption of electricity, or energy, within a community.
Besides all these, more technical aspects also behavioural aspects should be included. Research points out the importance of household’s behaviour on their energy consumption. Several studies try to find factors that influence this consumption. Poznaka et al.  analysed how and why the installation of smart metres changed households’ electricity use. Frederiks et al.  stress the importance of psychology and behavioural economics aspects and Bell et al.  point out that households should be studied individually, that their practices result, among others, from social relations. Since agent based modelling is a technique that is used in these disciplines as well, it would be interesting technique in realising interdisciplinary research in this field.
In this paper we have explored the emerging rise of prosumers in electricity and its implications for grid based electricity supply. With the help of an agent-based model, we have illustrated the evolution of prosumption in a residential community in five scenarios. Depending on the number of prosumers, combined with storage and peer-to-peer supply, we arrived at a share of prosumption in a local community of about 28–30 %. This is what can be expected in the short term, provided the emerging trend of prosumption continues as expected by the International Energy Agency. Our analysis of the development of prosumption could only be preliminary, given our rather straightforward model with simple assumptions and changing parameters one at the time per scenario. In reality, the changes will take place simultaneously, amplifying the effects. Moreover, the model did not visualise details of a 24-h electricity cycle, which is of course highly relevant in case of prosumption. These and other limitations of the model should be improved in next versions, to facilitate a more detailed and sophisticated analysis. Self-consumption is not yet studied that often with the help of agent-based models. A wide range of interdisciplinary issues related to the rising self-consumption need to be considered. Further research on these issues can enlarge the knowledge on self-consumption within a community. Studies that include aspects from different disciplines are complicated, but we think they are needed in this field.
The second part of the paper discussed some implications of a rising share of prosumption. It showed that the management of the local network will become more important if more households become prosumer in combination with storage and peer-to-peer supply. This trend also affects the grid operators’ current business models. The energy company is faced with a loss of turnover, which also needs to be compensated by developing alternative business models. We see that both, DSOs and energy companies, are exploring new ways to do business However, they are challenged by the fast pace of new developments and their unfamiliarity with the emerging situation. This paper can increase their awareness of the emerging self-consumption (wishes) of local communities. Developing business models in cooperation with local energy communities could be an attractive alternative to explore, as is currently being explored in the Netherlands. Here also develops an agenda for future research, in particular on the question on the next steps in the development of the electricity grid. Currently the technological side of the development is explored more intensively than the organisational and business side. Our article shows the necessity to focus on the organisational dynamics and its consequences for the business models of incumbents. Elsewhere (Arentsen and Bellekom ), we have reflected on the future of the electricity system from an innovation perspective and pointed to an increasing hybridisation in electricity supply, with respect to technology (localised versus centralised), organisation (integrated versus autonomous) and performance (private versus community oriented). Our simple simulation showed a significant bottom-up dynamic by community based presumption with implications for central production and supply. Interesting question here is how this bottom up dynamic will affect the dominant centralised featuring of the electricity system and whether the community is or should be considered as a new and independent agent in the electricity system. Interesting questions for further research on the dynamics in electricity supply.
The authors wish to thank the editors and three anonymous referees of this journal for their useful suggestions. Their views have enriched the paper.
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