Heat pump vs resistive heating
Why moving heat beats making heat.
You'll learn
- Explain heat pump vs resistive heating at engineering level
- Read the numbers that define the behaviour
- Apply the idea to a real vehicle
Overview
A resistive heater converts electricity to heat at best one-for-one. A heat pump moves several times more heat than the electricity it consumes — the single biggest efficiency lever in cold-weather EV design.
In depth
Resistive vs heat pump heating
| Resistive (PTC) | Heat pump | |
|---|---|---|
| Heat delivered per kWh in | ~1 kWh | 2–4 kWh |
| Response time | Very fast | Slower, especially when cold |
| Cost and complexity | Low | Higher — extra valves and sensors |
| Cold-ambient performance | Unaffected by ambient | Capacity falls as ambient drops |
Real-world range impact
Switching from resistive to heat pump heating has been measured to recover 10–20% of cold-weather range in independent testing, making it one of the highest-value additions to a winter-capable EV.
Key takeaways
Remember this
- Heat pumps move 2-4x more heat than the electricity they consume.
- Resistive heaters remain useful for fast response and backup at very low temperatures.
- Heat pumps are a significant, measurable winter range improvement.
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