AdD HyStor (2017–2020) was dedicated entirely to demonstrating an adaptive flywheel/battery hybrid system for grid stabilisation, receiving over €1M in Innovation Action funding.
SCHWUNDGRAD ENERGIE LIMITED
Irish SME demonstrating flywheel-battery hybrid storage to stabilise electricity grids with high renewable penetration.
Their core work
Schwundgrad Energie is an Irish energy technology SME specialising in grid-scale energy storage and power stability services for electricity grids with high shares of renewable generation. Their core work centres on hybrid energy storage systems that combine flywheel inertia with battery capacity to absorb sudden fluctuations in grid frequency — a problem that becomes more acute as coal and gas plants (which naturally provide inertia) are retired. They have moved from market feasibility analysis of dynamic ancillary services to hands-on demonstration of physical storage hardware, indicating an applied engineering rather than purely consultancy orientation.
What they specialise in
Both DESSART and AdD HyStor address the challenge of keeping grid frequency stable as renewable penetration grows, with DESSART scoping service models and AdD HyStor proving the technology.
DESSART (2015) examined dynamic energy system services specifically designed to help electricity systems meet renewable energy targets.
AdD HyStor was classified as an Innovation Action — implying prototype-to-demonstration maturity — rather than a research project, signalling practical deployment readiness.
How they've shifted over time
Schwundgrad followed a textbook SME commercialisation path within H2020: a 2015 Phase 1 feasibility study (DESSART, €50k) to validate market need for dynamic grid services, followed by a 2017 Innovation Action (AdD HyStor, €1.07M) to demonstrate the physical technology. This suggests their focus shifted from service design and business-case analysis toward hardware demonstration and technology validation. The jump in funding scale — more than 20-fold — indicates successful validation at the concept stage and growing investor or partner confidence in their storage approach.
They are on a commercialisation trajectory — from feasibility to demonstration — and are a credible candidate for Horizon Europe or national follow-on funding aimed at market deployment of inertia-based storage, particularly as synthetic inertia becomes a regulatory priority across European grid codes.
How they like to work
Schwundgrad always leads — both H2020 projects were coordinated by them, which is unusual for an SME and signals entrepreneurial drive and project management capability. They work in very small consortia (3 unique partners across 2 countries), suggesting they prefer tight, task-focused teams over broad academic-industrial alliances. A potential partner should expect Schwundgrad to set the agenda and own the commercial vision, rather than slot in as a silent technical contributor.
Schwundgrad has a minimal network footprint — just 3 unique partners across 2 countries in their entire H2020 history. Their collaboration is geographically concentrated, consistent with an early-stage SME that has deepened relationships with a small set of trusted technical partners rather than broadening its consortium base.
What sets them apart
Schwundgrad occupies a specific niche at the intersection of flywheel inertia technology and battery storage — a combination that is gaining urgency as power grids lose synchronous inertia from retiring thermal plants. As a project-coordinating SME rather than a university or large industrial, they can move faster from concept to prototype than academic partners and are more commercially motivated than research institutes. Their Irish base also provides access to one of Europe's most wind-dependent grids, giving them a natural testing ground with high real-world relevance.
Highlights from their portfolio
- AdD HyStorWith over €1M in Innovation Action funding, this is their flagship project — a live demonstration of adaptive flywheel/battery hybrid storage for grid stabilisation, placing them among a small number of SMEs that have taken hybrid inertia storage beyond paper studies.
- DESSARTA successful SME Phase 1 feasibility study that directly seeded the larger AdD HyStor project, demonstrating Schwundgrad's ability to turn a market concept into a fundable technology demonstration.