New rules for renewable energy start on 1 August 2025. The amendment to Lex RES III allows for the first time stand-alone battery storage, introduces licensed “storage” and opens the market for so-called flexibility aggregators. The battery part of the provisions will come into force on 1 October 2025.
The first big innovation is storage as a regulated activity: large and domestic batteries can stand alone and provide frequency balancing services to the grid. An aggregator – a new player licensed to trade electricity – is allowed to pool hundreds of households or businesses and trade their surplus. This is intended to help the grid cope better with fluctuations in generation from solar and wind and speed up the connection of new green power plants. Flexibility will also be enhanced by easier sharing of electricity in communities and the ability to adjust consumption according to price in real time.
For the public, this means two major bonuses. Lower bills and stronger consumer protection: those with battery PV can store energy during the day and sell it when it is expensive, or conversely, cheaply recharge their electric car at night. The ministry estimates household savings of up to a third of annual costs. In addition, the amendment introduces a mandatory hedging index and tightens licensing to avoid a repeat of the Bohemia Energy collapse. However, companies need to check whether they need a new storage licence and prepare for data exchanges with aggregators.
The so-called“Lex gas”, which speeds up the construction of gas-fired power plants and introduces a non-refundable payment for blocking capacity, also comes into effect from 1 August, so that the grid can finally serve real projects. Anyone who blocks capacity and fails to connect a source by a fixed deadline will now pay a non-refundable fee of up to CZK 50 million; old dormant contracts must either be amended by developers within 15 months or forfeited. At the same time, the permitting procedure for gas-fired power plants above 100 MW is being simplified and shortened – the state needs them as a quick stopgap before the grid is flooded with renewables. The result? More room for wind and solar farms, more reliable supply at peak times, and fewer “dead souls” on distribution cables.
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