Patent Wars Are Coming for Your BESS Margins

Intellectual property litigation attorney Isaku Begert of Marshall, Gerstein & Borun LLP looks at energy storage system patent risks and the steps that can be taken to mitigate them.

The Patent Trap is Real

If you think your only headaches are module delivery delays and inverter firmware bugs, think again. The commoditization of BESS hardware is driving manufacturers into a corner, and when growth slows, the lawyers come out to play. We’ve seen this movie before in the smartphone industry; it’s now playing on your job site.

When a Tier-1 manufacturer like CATL or BYD faces a patent injunction, it isn't just their stock price that takes a hit. It’s your warranty support, your spare parts supply chain, and your ability to commission the project. If you’ve standardized on a specific lithium-ion architecture for your C&I deployments in the DACH region, a sudden patent ban on that specific thermal management system can leave you holding the bag on liquidated damages.

The Installers’ Defense Strategy

Contractual Indemnification: If your PPA or EPC contract doesn’t explicitly demand the manufacturer indemnify you against IP infringement, you are already losing. Make it non-negotiable.
Diversify the Stack: Avoid 'monoculture' in your storage portfolio. If 100% of your current pipeline relies on a single proprietary string-inverter-coupled battery design, a single IP injunction stops your entire business, not just one project.
Monitor the Litigation: Keep an eye on ITC filings in the US and patent court activity in Munich. The European Unified Patent Court (UPC) is a new beast, and it allows for injunctions that can effectively wipe out a supply chain overnight.

Stop viewing patent law as a 'back-office' problem. When you’re signing a €2M storage contract, you’re not just buying cells and an enclosure; you’re buying a potential legal liability that could render your entire maintenance contract void if the manufacturer loses their right to sell the tech.

Why it matters: IP lawsuits can stop your BESS supply chain dead; if you aren't checking your manufacturers' litigation history, your next project commissioning is at risk.