Marios SaleptsisElectrical Engineering PhD · Politecnico di Milano

Research

Forecasts judged by the decisions they enable

Energy systems run on forecasts. My research makes those forecasts serve the decisions that depend on them: scheduling batteries, integrating photovoltaics and operating microgrids at lower cost.

Summary

The thesis in brief

My doctoral thesis, Advanced Photovoltaic and Load Power Forecasting Methods for Optimal Microgrid Scheduling, studies how forecasting and optimization should be designed together. Conventional practice trains forecasting models for statistical accuracy and hands their output to a scheduler. I show that this separation leaves value on the table, and develop forecasting methods that are trained on the cost of the decisions they inform.

The work runs from method to deployment: cost-aware and decision-focused forecasting, guarantees for models that keep learning while the system operates, coordination of several forecasters within one energy management system, risk-aware training for the days that matter most, and diagnostic tools that tell an operator which forecast errors are actually costly. Every method is validated on a real laboratory microgrid with photovoltaic generation, battery storage and electric vehicle charging, and within European research projects.

Institutions

Where the work was done

  • Politecnico di Milano logoPolitecnico di MilanoMilan, Italy
  • Polytechnique Montréal logoPolytechnique MontréalMontréal, Canada
  • Universidad Politécnica de Madrid logoUniversidad Politécnica de MadridMadrid, Spain
  • University of Western Macedonia logoUniversity of Western MacedoniaKozani, Greece

Expertise

Research areas

Forecasting

  • Photovoltaic and demand forecasting
  • Probabilistic forecasting and uncertainty
  • Electricity price forecasting
  • Forecast selection and combination

Forecasting for decisions

  • Training forecasts through the optimization they feed
  • Learning during operation, with guarantees
  • Coordinating several forecasters in one system
  • Risk-aware objectives

Optimization and diagnostics

  • Battery and electric vehicle charging scheduling
  • Scheduling under uncertainty and reserve requirements
  • Attribution of cost to forecast errors

Domains

Application areas

Microgrids Battery energy storage Photovoltaic generation EV charging Energy management systems Electricity markets and tariffs PV fleet monitoring Laboratory validation

Publications

Under review and accepted

Full record on Google Scholar and ResearchGate.

  • 2026
    Decision-Focused Learning for Optimal BESS Scheduling Under Load and PV Uncertainty in Microgrids
    M. Saleptsis, A. Lesage-Landry, M. Mussetta, S. Leva
    Energy, ElsevierUnder review
  • 2026
    Bridging the Gap between Predictive Accuracy and Operational Optimality: A Cost-Aware PV Forecasting Framework
    M. Saleptsis, R. Ramaschi, A. Fusco, M. Mussetta, S. Leva
    Applied Energy, special issue Microgrids 2027Under review
  • 2026
    Game-Theoretic Decision-Focused Learning for Microgrid Scheduling Under Multi-Source Uncertainty
    M. Saleptsis, A. Lesage-Landry, M. Mussetta, S. Leva
    IEEE Transactions on Smart GridUnder review
  • 2026
    A Novel Hierarchical Stacked Framework for Short-Term Load Forecasting: An Extreme Learning Machine and Extreme Gradient Boosting Ensemble Method
    M. Saleptsis, M. Mussetta, S. Leva
    IEEE Transactions on Industry ApplicationsUnder review
  • 2026
    A Stacked Ensemble Approach for Probabilistic PV Forecasting: Combining Physical Hybrid Neural Networks with Natural Gradient Boosting
    M. Saleptsis, M. Mussetta, S. Leva
    ELECTRIMACS 2026, Palermo, Italy, May 2026Accepted
  • 2026
    Towards a Peer-Based Probabilistic Framework for Photovoltaic Performance Monitoring with Aggregated Data
    R. Ramaschi, M. Saleptsis, E. Ogliari, S. Leva
    ELECTRIMACS 2026, Palermo, Italy, May 2026Accepted

Publications

Published

  • 2025
    State of Health Resistance Estimation Based on a Feed Forward Neural Network
    P. Eleftheriadis, M. Saleptsis, S. Leva
    Conference paper, July 2025
  • 2025
    Data-Driven Timestep Analysis for State of Health Estimation Using BiLSTM Neural Networks
    P. Eleftheriadis, M. Saleptsis, S. Leva
    Conference paper, July 2025
  • 2025
    Extreme Gradient Boosting for Day-Ahead Photovoltaic Output Power Forecast Refinement
    M. Saleptsis, R. Ramaschi, M. Mussetta, S. Leva
    Conference paper, June 2025
  • 2025
    Gradient Boosting Algorithms for Day-Ahead Residential Load Forecasting of Individual Household
    M. Saleptsis, M. Mussetta, S. Leva
    Conference paper, June 2025
  • 2024
    Comparative Analysis of Wireless Protocols in Smart Home Energy Management Systems
    M. Saleptsis, M. Mussetta, S. Leva
    Conference paper, October 2024
  • 2024
    Impact of PV and EV Forecasting in the Operation of a Microgrid
    M. Saleptsis, G. Manzolini, A. Fusco, D. Gioffrè, S. Leva
    Forecasting, vol. 6, no. 3, 2024Journal
  • 2024
    An Overview of Optimization Methods for Home Energy Management Systems
    M. Saleptsis, M. Mussetta, S. Leva
    Conference paper, June 2024

Thesis

Doctoral thesis

  • 2026
    Advanced Photovoltaic and Load Power Forecasting Methods for Optimal Microgrid Scheduling
    M. Saleptsis · Supervisors: S. Leva, M. Mussetta
    Politecnico di Milano, XXXIX cycleDefense expected November 2026