Renewable electricity reaches a tipping point in the Netherlands
In 2025, the Dutch energy transition reached a key milestone: 57% of electricity generation came from renewable sources. Solar and wind power have firmly established themselves as a core part of the energy system.
This growth marks a major achievement, but it also brings new challenges.
According to the 2025 annual figures from Energieopwek.nl, renewable electricity generation increased by approximately 27 petajoules. At the same time, peaks in solar and wind output, combined with grid constraints, led to curtailment. Around 16 petajoules of electricity could not be delivered to the grid, roughly equivalent to the annual electricity consumption of more than one million households.
These figures highlight a growing mismatch between when power is generated and when it can be used or transported.
A system facing a fundamental shift
The fact that a significant share of renewable generation could not be accommodated does not indicate a slowing energy transition. Instead, it shows that the system is entering a new phase.
Historically, the energy system was built around, centralised power plants,predictable & controllable generation, and supply adjusting to meet demand.
Renewable energy fundamentally changes this logic. It is decentralised and weather-dependent, which makes periods of oversupply increasingly common. As a result, the system must evolve to handle these new dynamics.
From capacity expansion to value optimisation
With major investments already made in renewable generation, the focus is shifting — from building more capacity to making better use of what already exists.
Maximising the value of renewable assets requires greater flexibility across the system, including:
- more flexible infrastructure,
- smarter operational strategies,
- and market designs better aligned with variable generation.
The role of Battery Energy Storage Systems (BESS)
One important solution lies in Battery Energy Storage Systems (BESS). These large-scale batteries store electricity during periods of oversupply and release it when demand is higher or the grid is under pressure. In doing so, they act as a bridge between generation and consumption and help reduce curtailment and grid congestion.
BESS enables renewable energy to be used when it is most valuable — not only when it is generated.
Building a future-proof energy system
However, storage alone is not enough. A future-proof energy system will require a broader combination of measures, such as:
- grid optimisation, including cable pooling,
- further decentralisation,
- structural grid reinforcement,
- active demand management,
- and continued development of energy markets.
The figures clearly show that renewable generation has gained a firm foothold. The next step is to ensure that every kilowatt-hour generated can deliver maximum value by building out the surrounding system to match the realities of a renewable-driven energy landscape.
