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20KW HVAC PTC Coolant Heater For Electric Vehicle

Name: 20KW HVAC PTC Coolant Heater For Electric Vehicle
Brand: Nanfeng
SKU: 249654440

20KW HV coolant heater for new energy vehicles is suitable for electric / hybrid / fuel cell vehicles and is mainly used as the main heat source for temperature regulation in the vehicle. The PTC electric heater is applicable to both vehicle driving mode and parking mode. In the heating process, electric energy is effectively converted into heat energy by PTC components.

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Description

20KW HVAC PTC Coolant Heater for Electric Vehicle

Products Description

Working principle of electric heater

New energy vehicle electric heater converts electrical energy into thermal energy, using various electric heating elements such as PTC (positive temperature coefficient) and thermal film heating elements. The main principles are as follows:

Electric energy into thermal energy: When the electric heater is powered on, electrical energy is converted into thermal energy through the heating element. The heating element's material is usually an alloy or ceramic with high resistance. When the current passes through, the element heats up rapidly and begins to heat the surrounding environment.

Working principle of PTC element: A PTC (Positive Temperature Coefficient) heating element is a self-regulating temperature heating element with a positive temperature coefficient. That is, as the temperature increases, the resistance increases, and the current decreases. It has high heating efficiency and safety.

Thermal film technology: The thermal film heater uses a thin film heating technology that converts electrical energy into thermal energy by attaching a conductive material to the surface of the film. The advantages of the thermal film heater are uniform heating, high energy efficiency, and lightweight, which are suitable for installation in the interior space of the vehicle.

Control system: The electric heater is usually connected to the vehicle's temperature control system, monitors the temperature in real-time through sensors, and adjusts the heating power according to the set parameters to ensure that the battery or passenger compartment is within the appropriate temperature range.

🔗 Can Multiple 20kW Heaters Be Connected in Series or Parallel?

🔗 Can Multiple 20kW Heaters Be Connected in Series or Parallel?

✅ Yes! If higher heating power is required, multiple 20kW electric heaters can be connected in series or parallel, depending on the application:

🔹 Series Connection (Higher Output Voltage, Same Current)
Best for:

Systems that require higher voltage operation (800V+ DC systems)

Ensuring even heat distribution in extended fluid loops

Large buses, coaches, and articulated EVs with extensive heating needs

🔹 Parallel Connection (Same Voltage, Higher Heating Power)
Best for:

Applications needing 40kW, 60kW, or more heating power

Large-capacity battery packs requiring rapid heating

Multiple heating zones in EVs with independent circuits

Products Parameter

20KW HVH Electric Bus Heater

Power (KW)	10KW	15KW	20KW
Rated voltage(V)	600V	600V	600V
Supply voltage (V)	450-750V	450-750V	450-750V
Current consumption (A)	≈17A	≈25A	≈33A
Flow (L/h)	＞1800	＞1800	＞1800
Weight (kg)	8kg	9kg	10kg
Installation size	179x273	179x273	179x273
Control signal	Rocker switch hardwire control	Rocker switch hardwire control	Rocker switch hardwire control

In-Depth Customer Concerns

20KW Electric Bus Batter Heater For EV Bus

1️⃣ How Does the PTC Heater Maintain Stable and Efficient Heating?

✅ Self-Regulating Technology: Unlike traditional resistance heaters, PTC (Positive Temperature Coefficient) elements adjust power output automatically based on the surrounding temperature. This prevents overheating and improves efficiency without requiring external control circuits.

✅ High Thermal Efficiency: PTC heating elements convert nearly 98% of electrical energy into heat, reducing energy waste and improving overall system performance in electric buses, trucks, and off-road EVs.

2️⃣ How Does the Heater Perform in Extreme Cold Conditions (-30°C and Below)?

✅ Cold Weather Optimization: Traditional heaters may suffer from power loss or slow heating in extreme cold, but PTC heaters maintain performance due to stable resistance characteristics.

✅ Fast Heat-up Time: The 20kW power output ensures rapid heating, which is crucial for electric vehicle thermal management, preventing battery degradation, and keeping cabin temperatures comfortable.

✅ Battery Protection: In extreme cold, EV batteries suffer from reduced charge acceptance. The PTC water heater plays a key role in warming up the battery pack, improving charging efficiency and range in winter conditions.