SIEA (Slovak Innovation and Energy Agency)

What does SIEA do and who does it answer to?

The Slovenská inovačná a energetická agentúra (SIEA), known in English as the Slovak Innovation and Energy Agency, is a state contributory organization established by Slovakia's Ministry of Economy of the Slovak Republic. SIEA was formally renamed to its current title by Ministerial Decision 18/2007, consolidating the country's institutional focus on energy and innovation into a single professional agency.

SIEA operates as the government's executing arm for energy policy, innovation support, and renewable energy promotion. The agency gathers, processes, and disseminates information related to energy efficiency, renewable energy source deployment, combined heat and power systems, and innovation activities. This role makes SIEA the primary contact point for homeowners and businesses navigating Slovakia's subsidy landscape for renewable energy installations.

As a state organization under the Ministry of Economy, SIEA reports to the government's economic policy framework, which prioritizes Slovakia's energy independence, EU climate commitments, and the transition away from fossil fuels. The agency's decisions on subsidy allocation, installer approval, and programme conditions are shaped by these national priorities.

Which programmes does SIEA administer for homeowners?

SIEA's most visible programme for residential property owners is Zelená Domácnostiam (Green Households Programme). Funded through the Slovakia Programme, which is co-financed by the European Regional Development Fund, this scheme distributes vouchers that cover up to 50% of eligible costs for installing renewable energy equipment. Eligible technologies include photovoltaic (PV) panels, solar thermal collectors, air-to-air and water-source heat pumps, biomass boilers, and small wind turbines. The related Zelená Solidarita (Green Solidarity) stream extends support up to 90% for low-income households that meet specific income thresholds.

Beyond Zelená Domácnostiam, SIEA oversees several additional support mechanisms:

• Innovation vouchers for businesses seeking to digitalize, automate, or develop new products.
• Professional training and certification programmes for energy auditors, boiler inspectors, air-conditioning technicians, and renewable energy installers, ensuring quality standards across the sector.
• Free energy advisory services (since 2009) providing expert consultancy to households, businesses, and public-sector organizations on energy efficiency and renewable energy.
• Information dissemination campaigns such as 'Live with Energy' and 'Efficient with Energy', promoting energy awareness.

SIEA also administers calls and programmes funded through the EU Recovery and Resilience Facility and various operational programmes, supporting deeper energy retrofits and innovation initiatives.

How does the Zelená Domácnostiam voucher mechanism work?

The Zelená Domácnostiam programme operates through a voucher system designed to simplify access to subsidies. Homeowners apply electronically through the official portal zelenadomacnostiam.sk. SIEA processes applications, verifies eligibility (property ownership, permanent residence in Slovakia, land-registry registration), and issues a voucher once approved. The voucher represents the subsidy amount the applicant is eligible to receive.

Critically, the applicant then has 90 days to have installation work completed by an SIEA-contracted installer. Only after installation is finished may the homeowner request reimbursement from SIEA. This timeline protects the programme budget while giving homeowners a defined window to arrange work.

The subsidy covers up to 50% of eligible costs for equipment and labour, though SIEA periodically adjusts these percentages and total budget allocations based on demand and available funds. In 2026, after a pause in new voucher issuance, SIEA reactivated applications, with new vouchers planned for issuance in the third quarter. Homeowners who applied before the pause remain in a queue, waiting to be activated as funds and programme capacity allow.

Why does the SIEA installer registry matter for homeowners?

SIEA maintains a registry of approved contractors and installers who have completed professional training, passed competence examinations, and met SIEA's vetting standards. This registry serves a gatekeeping function: if your chosen installer is not on SIEA's list, they cannot legally claim the subsidy on your behalf under Zelená Domácnostiam, even if they are a skilled tradesperson.

For homeowners, this means the installer registry is not merely a reference tool but a binding eligibility requirement. When you apply for a voucher, SIEA will ask for your installer's details and verify their status. If the installer is not registered, your application may be rejected or require you to change contractors. This creates an incentive for quality control: installers who wish to participate in subsidized work must invest in training and certification, and those who do become discoverable through the registry.

The registry also protects consumers by ensuring that anyone performing work on your renewable energy system has met baseline competence standards in electrical safety, thermal performance, and building integration.

How is SIEA involved in energy performance certificates and building records?

Slovakia's legal framework for building energy performance certificates is set by Act No. 555/2005 Coll. on Energy Performance of Buildings, as amended. Under this law, energy certification is mandatory for new buildings at final inspection, for existing buildings undergoing significant renovation, and when buildings are sold or leased. The certificates are issued by qualified energy auditors and must document a building's primary energy demand, energy class, and recommended improvements.

SIEA does not solely operate a centralized energy performance certificate register, but it plays a coordinating and information role. SIEA maintains records relevant to energy policy analysis, promotes compliance with certification requirements, and provides information to the public about obtaining certificates. The agency also operates the website mindop.sk, where general information about building energy performance is published and references to available certificates are maintained.

This role reflects SIEA's dual mandate: it is both a subsidy administrator and a keeper of national energy-efficiency data. The data gathered through energy certificates informs Slovakia's progress toward EU energy-efficiency targets and helps identify sectors and regions where intervention is most needed.

How does SIEA's role differ from SAŽP's?

Homeowners often encounter two main Slovak institutions administering residential renovation subsidies, and it is easy to conflate them. The key distinction lies in their parent ministry and programme focus. SAŽP (Slovak Environmental Agency) administers the Obnov dom programme, while SIEA focuses on renewable energy equipment, as described below:

Aspect	SIEA (Ministry of Economy)	SAŽP (Ministry of Environment)
Primary Programme	Zelená Domácnostiam (renewable energy equipment)	Obnov dom (comprehensive building renovation)
Eligible Work Scope	PV panels, heat pumps, solar thermal, biomass, small wind turbines	Wall insulation, window/door replacement, heating-system upgrades, heat pump installation
Subsidy Coverage	Up to 50% (Zelená Domácnostiam); up to 90% (Green Solidarity for low-income households)	Up to 50-60% depending on renovation depth
Focus	Energy source decarbonization and equipment efficiency	Building envelope and heating-system holistic improvement
Typical Homeowner Benefit	Lower energy bills from renewable generation or efficient heat source	Reduced heat loss and modernized building systems

In practice, ambitious homeowners often combine both programmes. A homeowner might apply to Obnov dom for wall insulation and window replacement, then pursue Zelená Domácnostiam for a heat pump or PV system. The programmes are designed to complement each other: better building envelope reduces heating demand, and renewable energy systems meet that reduced demand sustainably.

What regional presence does SIEA have?

SIEA maintains a national network consisting of a central office in Bratislava and three regional branches strategically located to serve all Slovak regions. The regional centers are situated in Trenčín (covering the north-west), Banská Bystrica (central Slovakia), and Košice (the south-east). This structure ensures that homeowners across Slovakia can access SIEA's free advisory services in person, not only by telephone or email.

Location	Region Served	Primary Service
Bratislava (HQ)	West Slovakia, national programmes	Programme administration, policy, main contact centre
Trenčín	North-west Slovakia	Regional free advisory service, installer support
Banská Bystrica	Central Slovakia	Regional free advisory service, training coordination
Košice	South-east Slovakia	Regional free advisory service, research partnerships

What free advisory service does SIEA offer?

One of SIEA's most accessible services, and often overlooked by homeowners, is its free energy advisory service (bezplatné poradenstvo). Launched in 2009 and sustained through EU structural-fund financing, the service provides expert consultancy on energy efficiency and renewable energy to households, entrepreneurs, and public-sector bodies.

Homeowners can contact SIEA advisors by three methods: a toll-free telephone helpline, email inquiry, or in-person consultation at any of the four regional offices. The advisors address questions ranging from basic 'Which renewable energy system suits my home?' to technical queries about heat-pump sizing, PV roof load, or integration with existing heating systems. The service also provides practical guidance on navigating subsidy applications, understanding eligibility criteria, and estimating long-term energy and financial savings.

SIEA complements this one-to-one advisory service with educational materials, podcasts, and online resources. The agency runs regular expert seminars across the country, especially at the start of new subsidy call rounds, to help potential applicants understand programme conditions and requirements. These seminars are open to the public and serve as a way for installers, project planners, and homeowners to stay informed about policy updates and technical standards.

How do SIEA's programmes align with Slovakia's energy and climate commitments?

SIEA's work is embedded in Slovakia's obligations under EU law and international climate agreements. The EU's Energy Performance of Buildings Directive (EPBD) and the Renewable Energy Directive set binding targets for energy efficiency improvement and renewable energy deployment. SIEA administers the Slovak government's response to these directives.

The Zelená Domácnostiam programme, in particular, advances Slovakia's renewable energy targets by making decentralized solar, heat pump, and biomass systems financially accessible to homeowners. By funding 50% of equipment costs and 90% for vulnerable households, the programme removes a major barrier to adoption. Similarly, SIEA's training and certification of installers ensures that the quality of renewable-energy and energy-efficiency work meets European standards, supporting Slovakia's credibility in EU energy markets.

SIEA also contributes to the European Green Deal and the Fit for 55 package by coordinating with the Ministry of Environment and SAŽP on overlapping renovation initiatives, ensuring that Slovakia's renovation rate increases without duplication or missed opportunities.