In recent years, the regulatory framework governing such systems has undergone several modifications concerning grid connection, settlement schemes and technical requirements. One recurring issue concerned equipment upgrades, particularly inverter replacements, which could potentially be interpreted as modifications affecting the contractual settlement arrangements between households and electricity suppliers.
To address this uncertainty, the Government adopted a new decree in February 2026, which clarifies that replacing an inverter within certain technical limits will not be considered a modification that changes the applicable settlement regime between the user and the electricity supplier.
Under the new rule, if an inverter replacement becomes necessary in connection with an investment carried out under the Home Energy Storage Programme, the nominal capacity of the new inverter may exceed the previous inverter’s capacity by up to 1 kW. In systems with multiple inverters, the relevant threshold is calculated on the basis of the combined nominal capacity of the previously installed devices. Within these limits, it is also permissible to install an inverter with a higher number of phases.
The amendment is expected to facilitate the integration of residential energy storage systems, which often require inverter upgrades. By clarifying that such technical changes do not automatically affect settlement arrangements, the decree reduces legal uncertainty for households and may encourage further investments in distributed renewable generation and storage in Hungary’s electricity system.