In the current implementation of EPC-s, the assessment focus is purely on the energy consumption data. For the next generation of EPC-s, new performance indicators are proposed to address relevant building performance aspects, such as sustainability, productivity and market value. These indicators would enable evidence-based decision-making processes and facilitate the delivery of renovation triggers. Within the EPC framework, the problem is not the availability of such performance indicators, but the assessment effort required. Only easily available data can justifiably be introduced to bulk EPC-s, either as direct complementary input or as a performance indicator. Availability of such data was analysed from case studies that included EPC-s from 11 EU member states, mainly non-residential buildings. Analysed data included relevant HVAC information such as ventilation air flows, heating and cooling set-points and installed power, but also output data, such as EPC classes, net and primary energy need and GHG emissions. Based on our findings, we outlined two different development paths - one for existing buildings and one for new buildings and major renovations. Two categories of complementary indicators to energy are proposed – IEQ and power indicators.

Renewable energy sources such as PV solar or wind power are intermittent and non-dispatchable. Massive integration of these resources into the electric mix poses some challenges to meeting power generation with demand. Hence, improving power generation forecasting has raised much interest. This work assesses the market value of enhanced PV solar power generation forecasting. Then, we analyse the different agents present in the electricity system. We link the studied agents to the proposed market values based on both analyses. Improving the accuracy of RES forecasting has massive potential as the sector grows and new agents arise. It can have reactive values like reducing imbalances or proactive values such as participating in intraday markets or exercising energy arbitrage. However, accurate forecasting can also lead to opportunistic values that can be exploited by malicious agents if they are not adequately regulated.

The effects of climate change are already impacting people’s quality of life worldwide. Evidence highlights the urgency in action to counteract this on-going process. Europe aims at fostering the green transition becoming climate neutral by 2050. The envisioned pathway encompasses an overhaul of the energy system including an increase in renewable energy production and end-user energy efficiency. The EU further recognizes the fundamental role of citizens and communities in addressing an effective transition. Within this framework, energy communities (EC) and peer-to-peer (P2P) energy trading are emerging as new opportunities for boosting green technologies in renewable energy and the smart grid sector, and for rising citizens’ awareness of the theme. However, the implementation of P2P ECs in Europe entails complex legal challenges that cannot be solved only through sector-specific regulation. This open letter critically presents the experience gained in the H2020 NRG2peers project about the knowledge advancement in the regulatory context of the project pilot sites. These are located in four EU ecosystems (from innovators to laggards) that are: the Netherlands, Spain, Slovenia, and Italy. Each EC involved in the NRG2peers project is thus facing different challenges related to its specific socio-economic condition and energy market framework. These barriers need to be overcome and new tools will be delivered during the NRG2peers project. Moving from the lessons learnt at the pilot sites, both roadmaps at the regulatory level and an advisory app are under development to support the uptake of the next generation of European peer-to-peer Energy Communities.

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