High Voltage

High-Voltage Power Requirement Heavy-duty applications require high power and torque. Low-voltage systems draw high current, increasing cost and complexity, so OEMs are switching to higher voltage architectures.

On-Board Charging Constraints On-board charging compensates for inconsistent access to DC Fast Charging infrastructure, but creates space, weight, durability, thermal, and safety constraints.

Durability Requirements Harsh environments (e.g., dust, liquid, heat, vibration) demand higher levels of ingress protection and thermal regulation. Fan-cooled units have technical & cost limitations, creating potential failure points.

System Complexity Sourcing systems and components from different suppliers raises costs, integration complexity, and validation difficulty—and lowers accountability.

Interoperability Mandate Interoperability issues across charging standards and vendors lead to field failures.

Global Compliance International and regional standards (e.g., NA/EU/China, ISO, IEC, J-standards) require constant engineering adaptation to maintain compliance.

Reduce system complexity and cost One enclosure with multiple charging functions minimizes boxes, interfaces, wiring harnesses, and integration time.

Market & portfolio expansion OEMs have the flexibility to grow into new segments, optimize space, and accelerate their roadmap with Delta-Q’s comprehensive range of compact, on-board high-voltage charging portfolio.

Boost reliability in harsh environments Liquid-cooled high-voltage chargers improve thermal regulation, enabling a single coolant loop that simplifies the overall thermal architecture.

Faster validation & time-to-market Tested with multiple EVSE and inlet vendors, and aligned with NA and EU technical and compliance standards, Delta Q’s high voltage charging solutions reduce the risk of late program redesign.

Deliver future-ready architecture All charging solutions are designed and engineered to support evolving charging protocols and global requirements.

Building on Delta‑Q’s foundation of quality and reliability, the high-voltage charging platform expands and advances the company’s charging technology, meeting the electrification needs of material handling, e‑mobility, and other off‑highway markets.

This integrated on-board architecture brings together:

On-board charging for high-voltage systems
High-power DC-DC converter to power auxiliary systems without a separate unit
Built-in EVSE Interface (EVC) for level 2 AC charging support
PLC Module for level 3 DC fast-charging support
Liquid cooling for harsh environments

What is a high-voltage on-board charger?

A high‑voltage on‑board charger converts AC power from a wall outlet or EV charging station into DC power to charge a high‑voltage battery pack, typically between 100 and 800 V. Manufacturers commonly use high‑voltage architectures in automotive, heavy industrial or off‑road equipment, including construction, mining, and agriculture.

On‑board chargers give operators flexibility by allowing the machine to charge wherever and whenever an available power source is present.

What’s the difference between AC charging, DC charging, EVSE interface, and PLC?

AC charging and DC charging refer to two different methods for charging EV batteries:

AC is slower, but safer, for battery longevity and usually used for overnight charging.
DC is much faster, but produces heat and can diminish battery capacity if done too frequently.

An EVSE (Electric Vehicle Supply Equipment) interface refers to the standardized connector design(s) used to plug an EV into a charger. These connector types, like SAE J1772, Type 2, or CCS, vary by region and determine what cables and charging stations a vehicle can use.

Powerline communication (PLC) refers to an electrical line that delivers both power and data. It’s necessary to support DC fast charging, where the vehicle and charging station must communicate constantly about charging speed, safety, temperature, and authentication.

Why are liquid-cooled chargers needed for heavy-duty EVs?

Heavy-duty EVs require liquid-cooled chargers due to their substantial thermal management requirements. However, heavy-duty EVs also benefit significantly from liquid cooling, as they are likely equipped with a coolant architecture to regulate the thermal load on other systems. On-board chargers can be integrated with these systems (e.g., battery, motor, and inverter) to provide thermal regulation without adding too much space or weight.

How does integration reduce system cost?

Integration reduces system costs in several ways. First, integrations that bundle all system components into a single box reduce the cost of additional parts, such as wiring harnesses. Second, OEMs can shift from managing orders and fulfillment across numerous suppliers to buying from a single supplier, thereby eliminating administrative redundancy (e.g., processing, validation). Third, if any adjustments or issues arise, one supplier can take accountability and resolve the problem more easily, minimizing impacts such as stalled production or recalls.

Why integrate an on-board charger, DC‑DC, EVSE interface, and PLC into one system?

OEMs traditionally source multiple components from different vendors to create the charging system, such as the on‑board charger, DC‑DC converter, EVSE interface, and PLC module. This often creates a system with multiple boxes, harnesses, connectors, and integration points, which introduces cost, complexity, and potential failure modes.

Because these components must communicate and operate together reliably, integration becomes a major engineering challenge. Working with several suppliers can slow development, introduce risk, and increase costs.

A 4‑in‑1 system solves this by combining all four functions into a single enclosure. This approach:

Reduces component count and wiring
Simplifies integration and validation
Minimizes failure points
Lowers overall system cost
Speeds up development and reduces risk

Instead of coordinating with multiple suppliers, OEMs can rely on a single partner that delivers a fully integrated charging solution, supporting customization as needed.

Why Delta-Q Technologies?

With over 26 years of industrial and commercial charging experience, Delta-Q Technologies continually demonstrates a commitment to the highest engineering and partnership standards. The engineering depth and expertise Delta-Q Technologies provides today (e.g., HV, PLC, cooling) directly builds upon its first charge algorithms and lab testing. All charger models undergo extensive evaluation within Delta-Q Technologies’ interoperability testing lab and under extreme conditions to ensure they meet OEMs’ and operators’ needs.

As part of the ZAPI GROUP ecosystem—a global electrification leader across motive, autonomy, telematics, and other applications—Delta-Q Technologies is optimally positioned to deliver turnkey integrations and application-specific charging solutions.

High-Voltage Charging Solutions for Tier-1 OEMs

The Problems OEMs Face

The Solution: Integrated, High-Voltage Chargers

High-Voltage Charging Solution Capabilities

Industries & Applications

Construction

Agriculture

Material Handling

Mining

FAQ

Some of Delta-Q's Customers

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Why Delta-Q Technologies?

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