Eos Energy forms new LDES development company

May 13, 2026 at 5:30 PM
Martin McConnell
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<p>Alongside private equity company Cerberus Capital Management, battery manufacturer Eos Energy has announced the launch of Frontier Power USA, a new development firm aiming to scale up long duration energy... <a class="view-article" href="https://solarbuildermag.com/energy-storage/eos-energy-announces-new-ldes-development-firm/">View Article</a></p> <p>-- Solar Builder magazine</p>

<figure class="wp-block-image size-large"><img alt="" class="wp-image-57690" height="458" src="https://solarbuildermag.com/wp-content/uploads/2026/01/dreamstime_s_277524905-1-700x458.jpg" width="700" /></figure>

<p>Alongside private equity company <a href="https://www.cerberus.com/">Cerberus Capital Management</a>, battery manufacturer <a href="https://www.eose.com/">Eos Energy</a> has announced the launch of Frontier Power USA, a new development firm aiming to scale up long duration energy storage (LDES) in the U.S.</p>

<p>With the company&#8217;s eyes on gigawatt-scale deployment, the new company is expected to unify Eos&#8217; vertically integrated storage technology stack, capital from Cerberus, and a performance wrap from Ariel Green. Eos and Frontier have already entered into a 2 GWh capacity reservation agreement, the companies say, expanding Eos&#8217; existing backlog as of late March. </p>

<p>Now, Frontier aims to deploy its long-duration storage systems across critical applications, officials say, including AI data centers and utility-scale solar projects. The company will draw from Eos&#8217; multi-GWh project pipeline which is currently undergoing active development.</p>

<p>According to Eos Energy CEO Joe Mastrangelo, the firm believes Frontier will help change the lead times of storage projects at large.</p>

<p>&#8220;Frontier Power USA changes the speed of long-duration storage financing and deployment, allowing customers to have faster access to capital and deep expertise in project development,&#8221; he says. &#8220;We feel confident that this will give Eos a new growth trajectory as we continue to expand manufacturing capacity. The platform pairs our integrated technology stack with institutional capital and a lender-ready performance framework that is designed to deliver what matters most: electrons to the grid.&#8221;</p>

<h3 class="wp-block-heading" id="h-changing-the-ldes-math">Changing the LDES math</h3>

<p>With continued electrification throughout a number of sectors and the sheer volume of AI data centers cropping up around the country, the U.S. energy grid is under near-constant duress in some states in the Union. Up until now, Eos officials say, the production times of <a href="https://solarbuildermag.com/energy-storage/new-long-term-ldes-forecast-now-available/">LDES projects</a> have been far too long to be truly practical solutions at grid scale.</p>

<p>Aaron Maczonis, managing director for Cerberus Capital Management, says Frontier Power USA is set to change that.</p>

<p>&#8220;We believe that Frontier Power USA will bring the speed and ability to scale that the grid urgently needs, at a time when the opportunity set is being driven by energy security requirements and sustained growth in power demand from electrification and AI,&#8221; he says. &#8220;By pairing the company’s execution and deployment platform with Eos’ differentiated long-duration storage technology and expanding U.S. manufacturing base, we believe this model creates a credible path to delivering storage capacity at scale.&#8221;</p>

<p>Maczonis continued, saying the new platform is designed to translate already proven LDES manufacturing technology, turning it into a reliable and grid-scale deployable asset. Furthermore, the storage systems Frontier produces will benefit from that, as the production platform looks to keep up with evolving needs and technological advancements.</p>

<p>&#8220;As energy storage projects scale, bridging the gap between technology innovation and associated liabilities becomes essential,&#8221; says Jamie Daggert, the energy storage practice lead at Ariel Green. &#8220;This transaction through Frontier Power USA shows how TPI can play that role, supporting both bankability and repeatable platform growth across the U.S.&#8221;</p>

<p>All of this, Eos says, is in service of accelerating the energy shift toward renewables in the U.S. Built for utility-scale, microgrid, and C&amp;I applications, the company&#8217;s LDES systems aim to add operational flexibility to the U.S. energy grid, the company says.</p>
<p>-- Solar Builder magazine</p>

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