A Practical Guide to Choosing the Right Kewtech Multifunction Tester for EV Installations, Site Compliance, and Everyday Electrical Testing
As the electrical industry adapts to evolving technology, particularly in electric vehicle (EV) infrastructure, the demand for advanced, reliable, and regulation-compliant multifunction testers (MFTs) continues to grow. Whether you’re installing a domestic EV charge point, testing a 3-phase distribution board, or providing PAT testing services, your choice of tester has a direct impact on safety, efficiency, and compliance.
Kewtech’s KT64DL, KT65DL, and KT66DL MFTs represent three tiers of capability, portability, and testing power — each designed to suit different working environments and testing needs.
In this blog, we’ll explore each tester’s features, practical site applications, and where each model excels, with a particular focus on EV testing functionality and real-world benefits for electricians on the job.
⚡ KT64DL – Small Size, Big Performance
If you need a compact but powerful tester, the Kewtech KT64DL is an ideal companion. Known as the UK’s smallest multifunction tester with EV and SPD capabilities, it’s tailor-made for domestic installers and maintenance electricians working in tight spaces or on fast-paced jobs.
Core Features:
6mA DC EV Test at 0° and 180° – crucial for verifying EV charge point safety where RDC-DD protection is required.
Magnetic Base – allows for hands-free operation by fixing to distribution boards or metal enclosures.
High-Accuracy Loop Test – ensures accurate impedance readings, even in low-resistance circuits.
Constant Live Voltage Detection – reduces the risk of blown fuses or PCB damage.
IP54 Rated – protects against dust and splashes on site.
Real-World Use:
The KT64DL shines on residential EV charger installations. When working on a tight consumer unit or outdoors in uncertain weather, its lightweight, durable body and intuitive interface make it a time-saver. Electricians frequently praise its magnetic base and simplified rotary dial, which allow quick setup and reliable readings without needing an extra pair of hands.
Its inclusion of SPD and EV testing makes it an affordable option for EV work without needing a full EVSE adaptor setup — particularly useful for small firms or one-man bands transitioning into the EV market.
🔧 KT65DL – All-Rounder with PAT Capability
Sitting in the middle of the range, the Kewtech KT65DL offers a flexible solution for those who want an installation tester with added PAT testing support. It’s an 8-in-1 device built to meet the 18th Edition Wiring Regulations and beyond.
Core Features:
PAT Testing Compatibility – works with PAT ADAPTER1 for Class 1 and Class 2 appliances, plus extension leads when paired with the Kewtech R2.
Auto RCD Test for 30mA Types
Phase Rotation and Earth Testing – suitable for 3-phase environments and TT systems (with optional earth spike).
High-Resolution Loop Test (0.001 ohm)
Protective Hard Cover and Soft Carry Case
Real-World Use:
For electricians working in mixed-use environments — say, a domestic property one day and a school or office the next — the KT65DL provides the flexibility to handle both installation and appliance testing in one tool. With downloadable result storage, Auto ID, and loop impedance precision, it’s ideal for:
Verifying electrical installations before EVSE connection
Testing protective conductors on 3-phase supplies
Offering PAT testing as an add-on service
While it doesn’t include 6mA DC EV testing natively, its solid installation testing suite makes it reliable for pre-commissioning checks on circuits before EV chargers are installed — especially useful on sites where multiple responsibilities fall to one engineer.
🚀 KT66DL – Flagship MFT for Advanced EV and Industrial Testing
At the top of the Kewtech range is the KT66DL — a powerhouse MFT with 12-in-1 testing functionality, purpose-built for high-spec electrical environments and fully future-proofed for the growing EV sector.
Core Features:
Full EV Charge Point Testing – compatible with KEWEVSE and KEWEVA adaptors to test CP/PP state, phase rotation, Type B RCDs and more.
Comprehensive RCD Testing – covers Types AC, A, F, B with Anti-Trip Technology (ATT) for safer testing on sensitive circuits.
Dual Display – view both fault current and voltage readings simultaneously during PSC and PFC tests.
Auto-Null, Auto-Discharge, Zs Limit Checks – for simplified safety checks and improved accuracy.
On-Board Memory – save and store test results directly on the device, ready for download later.
Real-World Use:
This is the go-to tester for professionals regularly working on:
EVSE installation and commissioning
Industrial and commercial boards
3-phase setups with no neutral
Infrastructure requiring precise fault analysis
Its oscilloscope output, phase rotation display, and support for advanced fault currents (up to 50kA) make it invaluable on sites where safety, detail, and data logging are non-negotiable. Combined with its ability to handle RCD testing without tripping supply circuits, it provides confidence and control on every job.
🔍 Quick Comparison Table
| Feature / Model | KT64DL | KT65DL | KT66DL |
|---|---|---|---|
| EV Testing | 6mA DC test (0°/180°) | No 6mA test | Full EVSE testing with adaptor |
| RCD Types | AC, A | AC, A | AC, A, F, B |
| PAT Testing | No | Yes (via adapter) | No |
| Loop Test Accuracy | High accuracy | High accuracy + 0.001 ohm | High current + dual display |
| Display Type | Standard screen | Backlit screen | Dual, advanced |
| On-Board Memory | No | Yes (for PAT) | Yes |
| Best For | Domestic EV installs, compact use | Mixed-use with PAT testing | Commercial/industrial & full EV testing |
💡 Final Thoughts – Practical Tools for Evolving Workflows
Kewtech’s KT64DL, KT65DL, and KT66DL aren’t just boxes of features — they’re tools designed to match the rhythm of real electrical work.
The KT64DL is perfect for EV installers needing portability and speed.
The KT65DL suits multi-purpose electricians who need to do a bit of everything, including PAT.
The KT66DL is the premium choice for full compliance, EVSE infrastructure, and advanced diagnostics.
As EV installations become standard on new builds and commercial retrofits, selecting the right MFT isn’t just about ticking off regulations — it’s about making your job safer, faster, and more efficient.
Whichever you choose, the Kewtech MFT range is built for now — and what’s next.
Click here to shop our entire range of Kewtech multifunction testers.