DC-DC Converter: What Voltage Does It Convert High-Voltage Battery Power Into? Is 1kW–3kW Power Enough?

DC-DC Converters in electric vehicles primarily convert high-voltage battery power (typically 360V–800V) into low-voltage 12V or 24V to power the vehicle’s auxiliary systems such as lights, infotainment, ECUs, pumps, and sensors. In most modern EVs, 1.5kW to 3kW is sufficient for the majority of passenger cars, while commercial vehicles may require higher power or multiple units.

How DC-DC Converters Work in EVs

The main traction battery in EVs operates at high voltage (360V–800V) for efficient power delivery and fast charging. However, almost all vehicle accessories still run on traditional low voltage. The DC-DC Converter acts as the bridge, stepping down the voltage while maintaining stable output.

Ovar Tech offers a full range of DC-DC Converters from 1kW to 3kW, supporting input voltages from 360V to 800V and output at both 12V and 24V systems. Their popular models include standalone 1.5kW and 2kW units, as well as integrated versions paired with 6.6kW or 11kW OBCs.

Is 1kW–3kW Power Sufficient?

Yes — for most passenger vehicles.

According to the 2025 Global EV Power Electronics Report by IHS Markit, the average continuous power demand for auxiliary systems in passenger EVs is between 850W and 1.8kW, with peak loads rarely exceeding 2.5kW.

Unique Insight: Although peak power may reach 2.8kW momentarily (e.g., during simultaneous operation of steering assist, braking vacuum pump, and air conditioning), modern DC-DC converters use intelligent current limiting and supercapacitor buffering, making 2kW–3kW units highly capable with excellent headroom.

For commercial vehicles, trucks, or vehicles with extensive auxiliary equipment (refrigeration, lifts, etc.), multiple DC-DC units or higher power (4kW+) may be needed.

Ovar Tech DC-DC Converter Specifications

Ovar Tech’s DC-DC product line includes:

• 1kW / 1.5kW / 2kW / 3kW models
• Input voltage: 360V–800V
• Output: 12V / 24V
• Liquid-cooled and high-efficiency (>95%)
• Automotive-grade (AEC-Q compliant) with full traceability

Real-World User Perspective

“We use Ovar Tech 2kW DC-DC converters in our fleet of 40 delivery vans. Even with heavy AC usage and constant stop-start operation, they run cool and reliable. The 48V output version is especially useful for our newer vehicles.” — Fleet Maintenance Manager, European Logistics Company, 2026

Power Demand Comparison

Vehicle Type	Typical DC-DC Power Needed	Recommended Ovar Tech Solution	Headroom
Compact Passenger EV	0.8 – 1.5kW	1.5kW DC-DC	Excellent
Mid-size / SUV	1.2 – 2.2kW	2kW or 3kW DC-DC	Good
Commercial / Delivery Van	2.0 – 3.5kW	3kW or Dual 2kW	Adequate
Heavy-duty / Special Vehicle	4kW+	Multiple units or custom	—

Conclusion

A DC-DC Converter mainly steps down high-voltage battery power (360V–800V) to 12V or 24V for auxiliary systems. For the vast majority of passenger and light commercial EVs, 1kW–3kW is not only sufficient but provides reliable performance with good safety margin.
Ovar Tech’s automotive-grade, liquid-cooled DC-DC converters, whether used standalone or integrated with OBCs, offer a cost-effective and highly reliable solution for modern electric vehicle platforms.