The grid doesn't need rotating mass

The grid doesn't need rotating mass

🎙 Charles Parkinson, David Leech, Jürgen Reinart 👥 2K 📅 June 11, 2026 ⏱ 60 min 👁 669 📄 expert opinion 🧭 2026-08-16
Available in: English (current) Français

Keywords

grid-forminginverterrenewablessystem strengthSMA

Summary

In this episode of Energy Insiders, hosts Charles Parkinson and David Leech interview Jürgen Reinart, CEO of SMA, a leading German inverter manufacturer. Reinart discusses SMA’s history, from its founding in 1981 to its growth and challenges with Chinese competition. He explains the company’s strategic shift from residential to utility-scale markets, with 80% of revenue now from large-scale applications. A key topic is the role of grid-forming inverters in maintaining grid stability without traditional rotating mass. Reinart argues that modern power electronics can provide inertia, fault current, and other essential services, citing examples of islands powered entirely by renewables and German cities operating on solar alone. He also addresses cybersecurity concerns, noting that inverters can be remotely controlled, and discusses European regulations restricting Chinese inverters in funded projects. SMA has exited the Australian home market but remains strong in utility-scale projects there. The interview concludes with Reinart expressing optimism about future growth and profitability.

154 words

Critical Evaluation

Value of the Information & Strength of the Argument

The interview provides valuable insights into the technical capabilities of grid-forming inverters and the strategic positioning of a major industry player. Reinart’s arguments are based on practical experience and specific examples, such as island grids and German city operations, which lend credibility. He directly addresses concerns about fault current and inertia, explaining how modern MOSFET technology can handle these challenges. However, the discussion is largely qualitative, with limited quantitative data or references to independent studies. The argumentation is persuasive but relies heavily on the authority of the speaker rather than on verifiable evidence.

Scientific Rigor, Source Quality, Title Accuracy

The interview is a primary source, featuring an expert opinion from a CEO. No external sources are cited, and the claims are not backed by peer-reviewed research. The title accurately reflects the central theme, which is the redundancy of rotating mass in modern grids. The discussion is coherent and stays on topic, though it is an opinion piece rather than a rigorous scientific analysis. The lack of citations and reliance on anecdotal evidence reduce the scientific rigor, but the practical expertise of the interviewee adds value.

194 words

Title / Content Match

The title accurately reflects the central claim discussed in the interview.

Quality & Reliability

8/10

Interview with a leading industry CEO providing expert insights, but lacks peer-reviewed sources and independent verification.

Key Moments

Contribution & Novelties

The interview provides a unique perspective from a major inverter manufacturer on the technical feasibility of grid-forming inverters to replace synchronous condensers. It offers practical examples and addresses common concerns about fault current and inertia. The discussion on cybersecurity and supply chain diversification adds a contemporary angle.

Pour aller plus loin :

  • Grid-forming inverters — Overview of the technology and its role in modern power systems.
  • Synchronous condenser — Traditional solution for grid stability, contrasted with inverter-based resources.
  • Australian Energy Market Operator (AEMO) — Official site for grid operation and planning in Australia, relevant to the discussion on system strength.

100 words

Radar Profile

The radar profile shows high scores in information quantity and quality, reflecting the depth of the interview. The technical level is moderately high, indicating a specialized audience. Reliability is slightly lower due to the lack of external citations, but the expert opinion adds credibility.

Reliability 7/10