Martindale BZ820-EV EVSE Socket Tester
The Martindale BZ820 EV Socket Tester is a professional first-line diagnostic tool designed for electricians, EV charge-point installers and maintenance engineers. Engineered for reliability and accuracy, the Martindale BZ820 EVSE Socket Tester provides a fast way to verify safety, functionality and correct wiring on EVSE charge points fitted with Type-2 connectors. It is ideal for checking EV chargers fitted with Type-2 connectors and for detecting 28 wiring fault conditions and also checking the voltage supply level before further testing is carried out.

With clear visual and audible indicators, including red LEDs and a continuous audible tone, the tester provides instant feedback on socket polarity and earth wiring faults. A chart on the tester supports quick basic fault diagnosis, while the integral CP mode and its slider switch allows vehicle states to be simulated, enabling structured functional testing in modes A, B, C and error simulation. Its integral Type-2 plug shows CP signal behaviour and confirms if the voltage supply is present L1, ensuring safe operation during testing.
The Martindale BZ820 EV Socket Tester is built for fast and reliable results. Whether performing commissioning, repairs or validation checks, the Martindale EVSE Socket Tester ensures that chargers fitted with Type-2 connectors are operating safely and correctly. It is the ideal solution for BZ820-EV connecting processes, professional diagnostics and verifying EVSE installations in the field.
▶ Discover Martindale BZ820 Key Features:

Martindale BZ820-EV Key Features:
- Designed specifically for checking EV chargers fitted with Type-2 connectors
- Capable of detecting 28 wiring fault conditions and also checking voltage status
- Instant feedback via LEDs and audible indicators
- Identifies socket polarity and earth wiring faults accurately
- Integral CP mode with slider switch allows vehicle states to be simulated
- Supports Mode A, B, C and error simulation for advanced EVSE testing
- Integral Type-2 plug shows CP signal activity and voltage supply presence on L1
- Provides fast and a combination of red LEDs for fault signalling
- Supports safe basic fault diagnosis using the built-in chart on the tester
- Suitable for commissioning, routine inspection and maintenance
- Optimised for professionals working with EVSE charge points
Why Choose the Martindale BZ820 EVSE Socket Tester?
The Martindale BZ820 EVSE Socket Tester is purpose-built to deliver accurate, fast and reliable testing for modern EV installations. Its ability to simulate vehicle states, detect wiring issues and verify voltage supply makes it one of the most capable tools in its class. As a Martindale EV Socket Tester, it ensures compliance, safety and confidence when working on EVSE charge points.
Engineers can quickly identify issues such as socket polarity and earth wiring faults, while the error mode simulates failure of the CP signal and if the voltage supply is present L1, helping diagnose deeper functional faults. This level of diagnostic accuracy is essential for preventing hazards and ensuring long-term charger performance.
Who Is This Tester For?
- EV charge point installers
- Commissioning engineers
- Maintenance and service providers
- Electrical contractors working with EVSE infrastructure
- Safety inspectors requiring fast and accurate EVSE verification tools
▶ See the Martindale BZ820 in Action:

❓ Frequently Asked Questions (FAQ)
Q1: What does the Martindale BZ820 EV Socket Tester check?
A. It checks EVSE safety and functionality, including detecting 28 wiring fault conditions and also checking voltage levels, polarity and earth wiring integrity.
Q2: Can the tester simulate different EV vehicle states?
A. Yes. The slider switch allows vehicle states to be simulated in modes A, B, C and error mode for CP failure diagnostics.
Q3: Does it work with all EV chargers?
A. It is specifically designed for chargers fitted with Type-2 connectors, which includes the majority of European and UK EVSE installations.
Q4: Is this the correct tester for first-line EVSE checks?
A. Yes. The Martindale BZ820 EVSE Socket Tester is ideal for fast initial checks before full load or insulation testing is performed.
Note: Be sure to check the official datasheet before buying, and the user manual before using any test equipment. Need training? Just reach out - we’re happy to help