OLED Battery Monitors for Boats and 12V / 24V / 48V DC Systems

Keep a clear view of your electrical system with compact OLED battery gauges designed for marine panels, camper vans, RV dashboards and off-grid DC installations. The MVA series gives fast, easy-to-read voltage and current information in a round 29 mm panel-mount format.

The amber OLED display is especially suited to cockpit and cabin use. It remains highly visible in daylight, while staying more comfortable at night than harsh blue or white displays. This makes it a practical choice for evening navigation, low-light panels and enclosed helm stations.

OLED Battery Gauges - Accurate Readability

• Amber OLED display: high-contrast screen with wide viewing angle for quick reading from different positions.
• Low power consumption: well suited to battery monitoring and permanent installation on DC systems.
• Digital resolution: clear 0.1V / 0.1A readout for precise everyday monitoring.
• IP66 front protection: resistant to water spray, dust and demanding marine environments.
• Wide input range: suitable for 8V to 60V DC systems including 12V, 24V and 48V setups.
• Compact installation: round 29 mm mounting hole with 6.3 mm quick-connect terminals.
• Reverse polarity protection: added safety during installation and service work.
• Matches the footprint of standard modular USB ports and rocker switch brackets.

Choose the Right Model

• MVA1 - OLED Voltmeter: monitors the voltage of one battery bank. Ideal for starter battery, service battery or auxiliary circuit checks.
• MVA2 - Dual OLED Voltmeter: displays two battery voltages on one gauge. Well suited to marine systems with separate start and house batteries.
• MVA3 - OLED Voltmeter + Ammeter: combines voltage and current monitoring in one compact display. A practical solution for house battery monitoring. 100A shunt included.
• MVA4 - OLED Ammeter: dedicated current monitor for tracking DC load or charging current. Useful for fridges, pumps, inverters, chargers and other onboard circuits. 100A shunt included.

Built for Single or Multi-Gauge Panels

The MVA series can be installed as a single battery gauge or combined in custom marine dashboards with multiple round instruments. This makes the range suitable both for simple battery checks and for more complete panel layouts with separate readings for start battery, house battery, charging circuit or live DC load.

The current-monitoring models MVA3 and MVA4 are supplied with an external 100A shunt. The shunt is installed on the negative side of the circuit, which is the standard layout for accurate DC current measurement.

Common applications include boat battery monitoring, marine switch panels, RV dashboards, off-grid battery boxes, 12V / 24V electrical panels, and custom control panels where a compact round digital battery gauge is preferred.

See also our compatible panel mounts and housings and our battery monitor wiring guides.

Technical Specifications