NYSE: HTNI

Energy Storage & Conversion

Store, convert, and deploy energy on your terms.

The Energy Storage & Conversion division develops battery energy storage systems, uninterruptible power supplies, inverters, and DC power platforms that ensure continuous, clean power delivery. Whether bridging renewable intermittency or providing critical backup, our systems are built for reliability at scale.

IronVault BESS

IronVault BESS Commercial Battery Energy Storage

Scalable lithium-ion battery energy storage for peak shaving, load shifting, and grid services.

The IronVault BESS is a containerized, turnkey battery energy storage system designed for commercial and industrial demand charge reduction, renewable energy time-shifting, and grid ancillary services. Each 20-foot ISO container houses up to 2.5 MWh of lithium iron phosphate (LFP) cells with integrated battery management, thermal management, fire suppression, and a bi-directional inverter. IronVault systems can be paralleled for multi-megawatt installations and are managed through NanoGrid IQ for optimal dispatch.

Lithium iron phosphate (LFP) chemistry for 6,000+ cycle life at 80% depth of dischargeIntegrated bi-directional inverter with grid-forming and grid-following modesActive liquid cooling maintaining cells within +/- 2 C temperature uniformity
Certifications:UL 9540UL 9540AUL 1741 SA
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Heritage PowerGuard

Heritage PowerGuard Uninterruptible Power Supplies

Double-conversion online UPS systems that guarantee clean, continuous power for critical loads.

The Heritage PowerGuard is a true double-conversion online UPS system available from 10 kVA to 1,600 kVA, providing zero-transfer-time protection against power outages, sags, surges, and harmonic distortion. Featuring IGBT-based rectifier and inverter technology with input power factor correction to 0.99, the PowerGuard draws clean sinusoidal current from the utility while delivering a tightly regulated output. Scalable N+1 parallel configurations and lithium-ion battery options deliver industry-leading power density and reliability.

True double-conversion online topology with zero transfer timeInput power factor greater than 0.99 with less than 3% iTHD at full loadUnity output power factor (kW = kVA) maximizing usable capacity
Certifications:UL 1778IEC 62040-1/2/3CSA C22.2 No. 107.3
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NanoConvert

NanoConvert Series Power Inverters & Converters

Bi-directional power conversion for solar, storage, and DC-coupled energy systems.

The NanoConvert Series encompasses a range of power inverters, DC-DC converters, and bi-directional AC-DC converters optimized for renewable energy, battery storage, and microgrid applications. String and central inverter configurations handle solar arrays from 50 kW to 4 MW, while bi-directional converters provide seamless DC-coupling between batteries, PV, and AC loads. Silicon carbide (SiC) MOSFET topology delivers best-in-class efficiency exceeding 99% peak and reduces cooling requirements.

Silicon carbide (SiC) MOSFET inverter stage for up to 99.1% peak efficiencyBi-directional AC-DC and DC-DC conversion in a single unitGrid-forming capability with black-start support for microgrid islanding
Certifications:UL 1741 SAIEEE 1547-2018IEC 62109-1/2
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IronDC Platform

IronDC Platform DC Power Systems

Reliable DC power plants for telecommunications, utilities, and critical infrastructure.

The IronDC Platform is a modular DC power system that provides -48 V DC, +24 V DC, and 380 V DC outputs for telecommunications central offices, cell tower sites, utility substations, and emerging 380 V DC data centers. Hot-swappable rectifier modules, integrated battery management for VRLA and Li-ion strings, and comprehensive monitoring ensure always-on DC power with N+1 or greater redundancy. The platform supports loads from 50 A to 12,000 A in a single frame.

Hot-swappable rectifier modules with N+1 redundancy and front-access servicingIntegrated battery management with per-string monitoring, mid-point sensing, and equalize chargingSupport for VRLA, lithium-ion, and NiCd battery technologies
Certifications:UL 60950-1NEBS GR-63 / GR-78 / GR-1089IEC 60950-1
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