Survey on residential rooftop solar power systems in Hungary
L.Z. Gergely, Z. Takács and M. Horváth Department of Department of Building Services and Process Engineering, Budapest University of Technology and Economics, Budapest, Hungary 2026-02-15

Abstract

Hungary has seen rapid growth in residential rooftop photovoltaic (PV) systems, with installations reaching 2.65 GW –over 35% of the country’s total PV capacity in 2023. However,detailed data on system characteristics and prosumer behaviour remain unknown. This study presents preliminary results from a 2025 survey assessing residential PV sizing, orientation, and electricity consumption. Results indicate that most PV systems were sized for an annual net-zero energy balance under the net billing scheme, with a median generation-to-demand ratio (GTDR) of 1.06. About 40% of systems have multiple orientations, with a shift toward west-facing panels to enhance self-consumption. PV owners consume nearly three times the national household average, with high adoption of heat pumps (83%) and electric vehicles (25%). These findings support policy recommendations for the transition from net billing to net metering and provide data for grid integration planning and national-scale PV modelling.

Key words: Photovoltaic, survey, load matching, rooftop solar

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