Fellten Universal Heater Box
Requirements
- HV Input: 300–400 V DC
- PTC Heater Output: 1200 W
- 12 V Supply: ≥2 mm² cable to M6 stud
- Ground: ≥2 mm² to fan-mounted spade connector
- CAN lines and LV signals with HVIL support
Enhance your EV conversion or custom electric vehicle project with the Fellten Universal Heater Box — a compact, powerful, and fully integrated cabin-heating solution designed for reliability, safety, and straightforward installation.
This plug-and-play heater unit combines a high-performance centrifugal fan with a high-voltage Positive Temperature Coefficient (PTC) heating element, delivering dependable cabin heat even under demanding conditions. It is ideal for retrofit electric vehicles, bespoke builds, and professional EV conversions. As used in our Land Rover Defender.
Key Features
-
Integrated HVAC Heating Module
Purpose-built for EV conversions with a compact, enclosed design. -
High-Voltage PTC Heater (300–400 V)
Efficient 1200 W output (at 6.4 m/s airflow) with self-regulating temperature control for safe, stable heating. -
Powerful Centrifugal Fan
Smooth, variable-speed fan control ensures comfortable and consistent airflow. -
User-Friendly Control Interface
Features separate fan and heat rotary controls with integrated LED status indicators. -
Safety-Focused Design
Built-in protection and LED fault codes identify fan failure, PTC failure, or controller/relay faults for straightforward diagnostics. -
Straightforward Installation
- Two 10 mm mounting points
- Designed for fascia-mounted front controls (54 × 75 mm aperture required)
- Clearly labelled LV/HV wiring with pinouts for reliable integration
- Supplied hardware includes M4 bolts, terminals, and grounding components



Worldwide Shipping
Fellten offers worldwide shipping through trusted carriers including UPS, DHL, and pallet freight services. Whether you're a professional installer or a classic car enthusiast, we ensure your order is packed securely and delivered efficiently.
We are fully certified to ship dangerous goods, including lithium-ion batteries, in compliance with all international regulations.
For UK orders, most in-stock items are eligible for next working day delivery if placed before 12:00 PM. Orders placed after this time will be shipped on the next working day. Please note that all delivery estimates are stock-dependent, and you will be notified if any delays are expected.
Shipping costs are calculated at checkout based on your location and order details, so you’ll always have clear and accurate pricing before completing your purchase.
Payments are securely processed using Stripe. We accept all major credit and debit cards.
