US ROUNDUP: BESS news from NeoVolta, Goshe, Frontier Power & Stella and Prevalon

The facility is located along Georgia’s I-85 corridor, it will initially concentrate on assembling prismatic-cell battery packs and integrating DC containers, supporting around 89 workers at its steady-state initial capacity.

NeoVolta noted at that time, that initial production is anticipated to focus more on utility-scale systems, while C&I systems are expected to capture an increasing share as demand rises. The platform is built to accommodate various system configurations and product formats, aligning with changing market needs.

This is the first commercial LOI associated with the Pendergrass facility, which NeoVolta said remains on track to begin ramp-up in Q3 of this year.

The LOI identifies three initial utility-scale project opportunities totaling approximately 1.1GWh across the US, including an approximately 400MWh project in West Texas, an approximately 400MWh project in Puerto Rico, and approximately 300MWh across multiple projects in the PJM territory.

In February, NeoVolta raised approximately US$23 million in gross proceeds through two financing transactions to support its manufacturing facility.

In November 2025, NeoVolta entered into agreements for a US$13 million private placement financing anchored by IGC. The US$13 million financing was part of a long-term relationship aimed at supporting NeoVolta’s US manufacturing efforts.

Ardes Johnson, CEO of NeoVolta noted of the LOI and project pipeline, “This is exactly the kind of demand visibility that will support disciplined production planning as we approach first output, and it demonstrates that the market is actively seeking domestic, FEOC-compliant BESS supply from a trusted US manufacturing partner.”

Also on 28 May, NeoVolta announced the pricing of a public offering of 12,195,122 shares of its common stock.

The shares of common stock are being sold to the public at an offering price of US$2.05 per share. The gross proceeds to NeoVolta from the offering, before deducting the underwriting discounts and commissions and other offering expenses, are expected to be approximately US$25 million. 

Goshe Energy Storage secures US$40 million, energises first 100MW asset

BESS developer-operator Goshe Energy Storage has secured a strategic HoldCo debt facility of up to US$40 million from investment firm S2G Investments’ special opportunities team.

Announced 28 May, the debt facility will support Goshe in acquiring and constructing late-stage development projects across the US.

In tandem with this facility, Goshe’s first asset in the Electric Reliability Council of Texas (ERCOT) market has become fully operational. 

According to the company, it closed on US$288 million in project-level financing for this initial 100MW asset, contributing to over US$460 million in total capital raised to date to fund its initial portfolio, inclusive of senior debt and tax equity financing.

Goshe said its primary strategy is to acquire late-stage development projects, secure financing, and manage them through construction and commercial operations. Its second asset, an 180MW system, is completing construction and is expected to come online in the next few months. Two additional projects are scheduled to enter construction later this year. 

Frontier Power USA and Stella Energy Solutions announce strategic framework

Long-duration energy storage (LDES) development and investment company Frontier Power USA (FPUSA) has announced a strategic framework with utility-scale clean energy platform Stella Energy Solutions.

The framework, announced 28 May, would see FPUSA acquiring and converting Stella’s late-stage 2GWh BESS project pipeline.

The strategic framework will target conversion of Stella’s pipeline utilising FPUSA’s previously announced 2GWh capacity reservation agreement with zinc hybrid cathode battery and storage system maker Eos Energy Enterprises.

Eos revealed on 13 May, with its Q1 2026 financial results, that a 2GWh firm capacity reservation agreement between Eos and FPUSA expanded Eos’ order backlog from its 31 March 2026 baseline.

The reserved capacity is earmarked for deployment across three segments—utility-scale installations, AI data centres, and C&I sites—all drawn from FPUSA’s multi-GWh project pipeline.

Additionally, the framework expands on the relationship between FPUSA and Stella, which was tapped as the execution partner on FPUSA’s previously announced 480MWh portfolio of long-duration BESS projects acquired from developer-operator Bimergen Energy.

It is expected that Stella will serve as a designated execution partner for FPUSA across its development pipeline and that FPUSA will receive exclusive evaluation rights on projects in Stella’s pipeline that meet the company’s investment criteria.

Further, FPUSA claims that upon its full equity capitalisation, it will convert eligible projects on terms consistent with the framework executed in the Bimergen transaction, under which FPUSA funds 100% of construction equity. Conversions will count toward deployment under the 2GWh capacity reservation agreement with Eos.

Prevalon Energy launches new BESS solution

System integrator Prevalon Energy has announced the launch of the HD5 AC, an AC block BESS designed to “reduce total installed cost, simplify deployment, and improve long-term system performance for utility-scale BESS projects.”

Prevalon said the HD5 AC expands the Prevalon energy storage platform, joining the 20-foot HD5 DC solution and the data centre-focused Hybrid Power Stabiliser.

HD5 AC integrates power conversion, controls, thermal management, and safety systems at the factory. Prevalon claims it arrives on site ready to connect and commission, reduces field labor, minimises installation scope, and improves schedule certainty.

According to the company, the system’s AC architecture is designed to simplify construction and reduce engineering, procurement, and construction (EPC) complexity. It eliminates high-voltage DC field cabling, reduces trenching requirements to a single connection point, and enables a quicker installation approach.

HD5 AC includes self-powered auxiliary systems, allowing the platform to be energised using stored battery power. This removes dependency on grid readiness, which Prevalon says helps avoid a common source of project delay.

The system uses a distributed string architecture that Prevalon claims isolates faults to 500kW blocks and allows for component replacement, which the company says increases system availability and reduces downtime. Integrated thermal management is designed to support consistent battery performance during commissioning delays or phased project builds.

The HD5 AC reduces available short-circuit current by up to 10x compared to conventional architectures, according to the company, which lowers arc-flash risk and simplifies protection design. It also incorporates ventilation, detection, and fire protection systems aligned with industry standards, while maintaining a low acoustic profile without additional noise mitigation.

The platform’s modular architecture also supports a range of durations and applications, from grid-scale storage and renewable integration to data centre power. For hyperscale and “mission-critical environments”, the HD5 AC can be deployed as part of a Hybrid Power System architecture.

HD5 AC also integrates with insightOS, Prevalon’s energy management system (EMS), launched in 2025.

Earlier this month, Prevalon and IPP Innergex energised the 42MW/210MWh San Andrés II BESS in Chile, building on the existing San Andrés BESS I project, which are both connected to the San Andrés solar facility.

Yesterday (28 May), Nextpower (formerly Nextracker) announced it had agreed to acquire Prevalon Energy – more on that in the coming days.