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RES Croatia to Brussels: Renewables have no future in Croatia

RES Croatia, together with SolarPower Europe and WindEurope, has sent a letter to the European Commission to raise concerns about the crisis in Croatia’s renewable energy sector.

The three associations emphasized that for several years, 60 projects for investments in solar, wind, geothermal, and batteries have been blocked, and that if nothing is done, many of them would soon be abandoned.

Without urgent deblocking of renewable energy projects, Croatia will lose investments, increase fossil fuel imports, which already exceed 25%, and miss the European Union’s and national target of at least 42.5% of energy consumption coming from renewables by 2030, according to Renewable Energy Sources of Croatia (RES Croatia), SolarPower Europe and WindEurope.

The national organization warned that the government is gradually phasing out subsidies for electricity prices for citizens and entrepreneurs. At the same time, the development of renewable energy sources as the only sustainable solution for lower bills and lowering imports is at a complete standstill, it added.

Projects with a total capacity of 3.5 GW and investments of EUR 3 billion are blocked

Croatia is currently subject to infringement proceedings due to delays in implementing the European Union’s RED II and RED III directive. They aren’t just a piece of paper, but a mechanism to ensure energy security and independence, which is of strategic interest for Croatia and its citizens, RES Croatia underscored.

The organizations are urging the European Commission to use its tools to demand from the government to determine the grid connection fee, but at EUR 0 per kWh, open up the balancing market for renewable energy producers, and integrate battery energy storage systems (BESS) and electrification into national planning.

Currently, 60 projects for solar power plants, wind farms, geothermal power plants, and batteries with a total capacity of 3.5 GW and investments of EUR 3 billion are blocked, according to the letter, accompanied by an annex.

The domestic industry is unable to sign long-term PPAs

For these projects, the state has already charged EUR 25 million through energy approvals— the first in a series of documents that requires payment to the state, which, due to the blockage, are beginning to expire at the end of this year.

Organizations stressed that these projects are permanently losing the paid money, while local communities are losing significant revenues that would have been allocated to them from the implementation of renewable energy projects.

They also drew attention to the domestic industry’s inability to sign long-term power purchase agreements (PPAs) with renewable energy producers, securing more favorable market conditions and thereby increasing its competitiveness in European and global markets.

Of note, the European Commission advised Croatia in June to speed up the installation of renewable energy capacities.

If nothing is done, projects of as much as 2.5 GW overall will be abandoned as early as next week

The associations pointed out that the development of new projects larger than 10 MW has stalled since 2022 because the Croatian Energy Regulatory Agency (HERA) has not set a transmission network connection fee for renewable power plants.

Instead, they added, Croatia’s transmission system operator (TSO) HOPS is trying to shift the costs of network modernization – planned over ten years ago and not related to new projects – to new renewable energy projects.

The minister of economy said in March that the upcoming connection fee would be EUR 0 per kW

It is increasing the project cost by 30% to 40%, making them unprofitable, RES Croatia said.

Such a model for financing the network is not from European practice, because 80% of member states rely on EU funds and their national budgets, rather than on producers.

They also recalled that the minister of economy announced in March that a connection fee would be set at EUR 0 per kW and that developers would be offered flexible contracts to encourage investment in battery storage. But that promise has not yet been fulfilled.

The three organizations warn that if nothing is done, projects of up to 2.5 GW altogether would be abandoned as early as next week after HOPS’s decision,. It means companies would withdraw from the Croatian market and lose millions in investments that would have permanently lowered energy prices in the country, RES Croatia claimed.

The balancing market is not functional

An additional problem is the non-functional balancing market, according to the letter.

HEP Proizvodnja, a subsidiary of state-owned utility Hrvatska Elektroprivreda (HEP), is the dominant provider of balancing services, and often the only one. HOPS is legally obliged to ensure market-based procurement of these services, yet it is itself a wholly owned subsidiary of HEP.

It creates an obvious conflict of interest and undermines market competition, the signatories underlined.

“Despite the demonstrated technical ability of solar and wind power plants to provide balancing services, HOPS doesn’t allow these plants to participate in balancing markets. As a result, HOPS frequently activates extremely expensive balancing resources, often at maximum regulated prices even during hours of high renewable generation and positive market prices,” the letter reads.

Croatia has no serious electrification plan

The organizations pointed out that such pricing constitutes a clear violation of the EU principle that balancing services must reflect only the actual costs incurred by the TSO.

They also stressed that Croatia lacks a concrete electrification plan. In 2022, renewable energy accounted for only 2.4% of final energy consumption in transport, with electricity from renewables contributing just 0.2%.

The target for renewable electricity in transport by 2030 is only 5.8%, reflecting limited ambition compared to the EU ambitions, according to the letter.

Electrification of railways could significantly reduce emissions and accelerate the transition, however, it remains an untapped potential, the signatories organizations noted.

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Virtual power plants: How they work and who can benefit from extra income

Virtual power plants, aggregators, and flexibility are gaining increasing attention, and not just within the energy sector. The growth and volatility of electricity prices have forced many businesses and institutions to install solar panels to cut costs. Virtual power plants – set up by aggregators to provide flexibility services – can generate additional income for new electricity producers and consumers capable of reducing or increasing consumption or storing energy.

The deployment of solar panels across Europe, including the Western Balkans, is experiencing remarkable growth, bringing numerous benefits to all who choose to produce electricity for self-consumption and become prosumers. Two of the four D’s of the energy transition are already underway – democratization and decentralization – resulting in increasing numbers of small energy producers and growing amounts of distributed (decentralized) production from renewable energy sources.

This has led to the emergence of aggregators – firms that connect multiple small producers, or even large-scale solar power plants or wind farms, with energy consumers capable of reducing or increasing consumption on demand, and with energy storage systems. The result is the virtual power plant, which functions like a real power plant thanks to software that connects and harmonizes all these actors.

Such a system can “iron out” the variability of renewable energy sources – solar or wind, and offer a more predictable energy delivery to the market as well as auxiliary services and on-demand flexibility to the system.

Naturally, this brings revenue, which is distributed among the members. For all this to work in practice, a lot of regulation is needed, and it is slowly being adopted in this region. Although they have not yet reached their full potential, there are already virtual power plants and aggregators in Bosnia and Herzegovina, Croatia, Hungary… But how does it all look in practice?

Energy Institute Hrvoje Požar joins virtual power plant KOER

By concluding an aggregation agreement, Energy Institute Hrvoje Požar (EIHP) has joined the KOER virtual power plant. Specifically, EIHP made available its 50 kW solar power plant, installed on the roof of its office building, to KOER, an aggregator on the Croatian electricity market.

Minea Skok, head of the Scientific Council and senior researcher at EHIP, explains to Balkan Green Energy News that KOER has conducted preparations for including the EIHP solar power plant in the virtual power plant.

The aggregator has installed control and metering equipment that enables the reading of electricity production from the existing electricity meter, along with software that enables data aggregation and forwarding to the transmission system operator, real-time 24/7 monitoring and alerting, reporting to the operator and the owner, and cost calculation.

It also conducted internal tests of the EIHP solar power plant’s balancing energy.

KOER provides services to Croatia’s transmission system operator HOPS

KOER’s virtual power plant, along with eight other providers on the Croatian market (aggregators and network users), provides services to the Croatian Transmission System Operator (HOPS), which is responsible for organizing the balancing market throughout Croatia, Skok explains.

Currently, the service involves balancing through the activation of balancing energy from a contracted mFRR (manual frequency restoration reserve), and soon also from aFRR (automatic frequency restoration reserve), according to her.

These system services are essential for any country’s transmission system operator to maintain power system balance, ensuring that all consumers have enough electricity at all times. These services also provide flexibility, which is increasingly in demand due to the growing share of solar power plants and wind farms – energy sources that are not flexible, since they only generate electricity when the sun is shining or the wind is blowing.

KOER and EIHP split the earnings 50-50

As for EHIP’s compensation for providing these services, Skok revealed that the contract defines the compensation received by KOER, as the aggregator, is split 50-50 with EHIP.

For the provision of these services, HOPS organizes tenders in which KOER competes with other service providers.

Skok emphasizes that EHIP’s solar power plant is profitable on its own, as it brings savings through lower electricity bills, which means the service fee is additional income.

On top of all that, gaining practical experience is an added value for EIHP, says Skok.

EIHP will also install a heat pump and a battery

The 50 kW photovoltaic power plant, matching the maximum available roof space of the EIHP building, was put into operation nearly a year ago.

Its average annual output is about 50,000 kWh. The EIHP building’s electricity consumption used to be 186,539 kWh, but thanks to energy renovation and the option of working from home, it was reduced. As a result, in the first ten months of operation, the power plant covered 53% of EIHP’s electricity consumption.

Following the energy renovation and the installation of solar panels, EHIP now plans to install a heat pump and a battery.

With its solar power plant, EIHP makes an additional contribution to power system balancing. By adding flexibility on the consumption side through the planned installation of a battery system and a heat pump, and in cooperation with KOER, the aggregator, EIHP contributes to system stability and the integration of new renewable energy sources, according to Skok.