If you're building or upgrading an electric vehicle, choosing the right on-board charger (OBC) is one of the most critical decisions you'll make. The 6.6KW OBC charger has quickly become the go-to standard for serious EV builders — and for good reason. In this guide, we'll break down exactly what a 6.6KW OBC does, why it outperforms 3.3KW alternatives, and how Deligreen's TC Charger 2-in-1 6.6KW OBC CD-LF01 takes it a step further with an integrated DC/DC converter.
What Is an OBC (On-Board Charger)?
An on-board charger is the device inside your EV that converts AC power from the grid into DC power to charge your battery pack. Unlike off-board DC fast chargers, an OBC travels with the vehicle and handles Level 1 and Level 2 AC charging — the kind you do at home or at public AC charging stations.
The power rating of your OBC directly determines how fast you can charge. A 3.3KW OBC on a 10kWh battery pack takes roughly 3+ hours for a full charge. A 6.6KW OBC cuts that time nearly in half.
Why 6.6KW Is the Sweet Spot for DIY EV Builders
Here's why experienced builders consistently choose 6.6KW over lower-rated alternatives:
- Faster charging without DC fast charge infrastructure — You get near-double the charge speed using standard 32A Level 2 AC supply, which is widely available.
- Compatible with most lithium battery packs — Whether you're running LiFePO4 or NMC chemistry, a 6.6KW OBC handles the job efficiently.
- Efficiency at scale — At full load, a quality 6.6KW OBC like the CD-LF01 achieves ≥93% efficiency, meaning minimal energy is wasted as heat.
- Future-proof — As battery packs grow larger in DIY builds, a 6.6KW OBC ensures your charging infrastructure keeps pace.
Deligreen TC Charger 2-in-1: 6.6KW OBC + 1.5KW DC/DC Converter
The Deligreen CD-LF01 isn't just a charger — it's a complete power management solution in a single compact unit. Here's what makes it stand out:
Key Specifications
- Output: 144V / 23A (6.6KW charging power)
- Integrated DC/DC Converter: 1.5KW — powers 12V auxiliary systems directly from the main pack
- Input Voltage: AC 90V–265V (universal input, works worldwide)
- Input Current: 32A max
- Power Factor: ≥0.99 (near-unity — excellent grid efficiency)
- Efficiency: ≥93% at full load
- Protection Rating: IP67 (fully dust-tight and waterproof)
- Operating Temperature: -40°C to +85°C
- Charging Control: CAN bus or Enable signal
- Cooling: Forced air cooling (fan-cooled)
- Dimensions: 250mm × 222mm × 66.7mm
- Weight: 11 kg
Built-In Protections
The CD-LF01 includes comprehensive protection features that are essential for safe EV operation:
- Output over-voltage and over-current protection
- Short-circuit protection
- Polarity reverse protection
- Input under-voltage and over-voltage protection
- Over-temperature protection
These protections make it suitable for both professional EV conversions and advanced DIY builds where reliability is non-negotiable.
The 2-in-1 Advantage: Why an Integrated DC/DC Converter Matters
Traditional EV builds require a separate DC/DC converter to step down high-voltage pack power to 12V for lights, BMS communication, fans, and other auxiliaries. This means extra wiring, extra mounting space, and another potential point of failure.
The Deligreen CD-LF01 eliminates this by integrating a 1.5KW DC/DC converter directly into the charger housing. The result:
- Cleaner wiring harness
- Reduced component count
- Smaller footprint in the engine bay or battery enclosure
- Single unit to configure and monitor via CAN bus
CAN Bus Control: Integration with BMS and VCU
One of the most important features for serious builders is CAN bus communication. The CD-LF01 supports CAN protocol, allowing your Battery Management System (BMS) or Vehicle Control Unit (VCU) to:
- Dynamically adjust charge current and voltage
- Monitor charger status in real time
- Trigger charge cutoff based on SOC or temperature
- Enable smart charging profiles for different battery chemistries
This level of integration is what separates a professional-grade build from a basic conversion.
Who Is This Charger For?
The Deligreen 6.6KW OBC CD-LF01 is ideal for:
- EV conversion builders converting ICE vehicles to electric
- Electric motorcycle and trike builders needing compact, high-power charging
- Electric boat and marine applications (IP67 rating handles moisture)
- Electric utility vehicles — forklifts, golf carts, and industrial EVs
- Professional EV integrators who need CAN-controllable, reliable hardware
Real-World Performance: What Customers Say
With a 4.5/5 average rating from verified buyers, the CD-LF01 has earned strong reviews from builders in the field. Customers highlight its build quality, reliable CAN communication, and the convenience of the integrated DC/DC converter as standout features.
How to Choose the Right Output Voltage
The CD-LF01 is available in configurations to match common EV battery pack voltages. The 144V / 23A version is optimized for mid-to-high voltage packs common in car conversions and larger utility vehicles. If your pack runs at a different nominal voltage, Deligreen offers a range of OBC options — contact us to confirm the right spec for your build.
Final Thoughts
A 6.6KW OBC is no longer a luxury — it's the baseline expectation for any serious EV build in 2024 and beyond. The Deligreen TC Charger CD-LF01 delivers that power with the added intelligence of CAN bus control, the convenience of an integrated DC/DC converter, and the durability of IP67 protection.
Whether you're doing your first EV conversion or your tenth, this charger belongs on your shortlist.
Ready to upgrade your build? View the Deligreen 6.6KW OBC CD-LF01 →