Plug-in solar systems are very small PV energy systems, usually two or three modules and less than 1 kW in total per installation, which are connected to a micro-inverter and plugged directly into a normal household socket. This then feeds the house’s internal electricity system. These low-cost panels can be put on balconies or outdoor spaces.
The use of plug in mini solar technology has grown in some EU countries in recent years as consumers search for ways to save on high energy bills. It has seen particular growth in Germany.
Officials from my Department engaged with stakeholders on the optional provisions in the 2024 Electricity Market Design Directive, including the provision relating to plug-in mini solar systems, through a consultation that ran from September to October 2024. Overall, 22 responses were received from groups including suppliers, civil society organisations, industry, system operators, business and supplier advocacy groups and a university. With specific regard to plug-in mini solar systems, five respondents commented on the introduction of this technology including ESB Networks, Electric Ireland, Bord Gáis Eireann, Energia and the Electricity Association of Ireland.
A number of respondents to the consultation raised potential safety issues with the introduction of plug-in mini solar. As a result, it is important that the introduction of the technology is given appropriate consideration and some form of regulation may be needed were plug-in mini solar to be promoted. The results of this consultation along with the submissions will be published shortly.
My officials are currently engaging with the relevant agencies and regulators, including with ESB Networks in its role as the system operator. My officials are also in contact with officials from the Department for Energy Security and Net Zero in the UK, relating to the recently announced intention by the UK Government to regulate for the sale and use of plug-in mini solar systems. EU Guidance on the matter is also being considered.
