Blue Sea Systems M2 OLED Digital Monitor, IP66

Overview

The Blue Sea Systems M2 OLED Digital Monitor is a compact marine monitoring platform for keeping watch over AC power, DC battery systems, tank levels, bilge pump activity, or combined vessel systems, depending on the selected configuration. The range uses an OLED display with auto-dimming and adjustable alarms, giving the helm, nav station, electrical panel, or service area a clear readout without taking up much panel space.

These monitors are built around practical onboard checks: battery voltage and current, shore power or generator voltage, AC frequency, tank level, bilge cycle activity, and system alarms. The display size is 55mm x 28mm, the DC supply input is 7-70V DC, and the front carries an IP66 rating for the exposed face of the installed unit.

For refits and panel upgrades, the M2 line is useful when a boat needs digital information in one visible location rather than several separate analog gauges. It suits cruising boats, fishing boats, workboats, and sailboats where electrical status, tanks, or bilge activity need to be checked quickly before departure, while charging, or during a longer run.

Key features

• OLED display with auto-dimming so readings remain visible in changing cabin, cockpit, or panel lighting.
• Adjustable alarms help flag high or low readings before they become harder-to-trace electrical or system issues.
• IP66-rated installed face helps the monitor handle spray, washdown exposure, and damp marine panel locations.
• 7-70V DC supply input works with common 12V, 24V, and 48V DC vessel electrical systems.
• External MOSFET relay capability lets measured values be used to trigger supported external circuits or alarms.
• Range covers dedicated AC meters, dedicated DC meters, tank monitoring, bilge monitoring, and a vessel systems monitor.
• Selected AC configurations monitor voltage, current, frequency, and power, with voltage functions covering 50 to 250V AC.
• Selected DC configurations monitor voltage, current, and battery state of charge, with DC voltage functions covering 8 to 70V.
• The Vessel Systems Monitor configuration adds NMEA 2000 certified connectivity for sharing supported monitoring data with compatible onboard displays.

Variants

This M2 OLED range varies by monitored system and meter function. The AC models cover AC voltage, AC current, or AC multimeter readings. The DC models cover DC voltage, DC current, DC multimeter readings with state of charge, tank level monitoring, bilge monitoring, or broader vessel systems monitoring.

Across the range, the display format and compact M2 panel style remain consistent, while the wiring, sensors, current measurement hardware, and available readings depend on the selected monitor type. The Vessel Systems Monitor is the broadest configuration, combining AC, DC, tank, and bilge monitoring in one unit.

Installation and setup

The monitor is meant for panel installation where the display can be seen and reached during normal operation. Common mounting locations include the DC distribution panel, AC shore power panel, navigation station, helm electrical area, or an engine room monitoring panel, depending on what the selected model measures.

For DC battery monitoring, plan the installation around the monitored banks, shunt placement where required, and the routing of small signal wiring back to the display. For AC monitoring, installation should be handled with proper marine AC safety practices, correct overcurrent protection, and separation between AC and DC wiring as required on board.

Compatibility and fit

Before ordering, match the selected M2 monitor to the system being measured rather than only to the panel opening. A DC voltmeter is suited to battery-bank voltage checks, a DC ammeter or multimeter is used where current and state of charge matter, and the AC versions are for shore power or generator circuits that need voltage, current, frequency, or power information.

Tank and bilge versions serve different onboard jobs. The tank monitor handles level monitoring for up to four tanks, while the bilge meter tracks up to four bilges and can show activity such as pump cycles and run-time information. The vessel systems version is better suited to boats that want several of these functions consolidated in one display location.

Use on board

On a cruising boat, this monitor range helps make pre-departure checks more direct: battery condition, charging behavior, AC input, tank level, and bilge activity can be reviewed from the panel instead of being guessed from separate indicators. On fishing boats and workboats, the same information is useful during long days with electronics, pumps, refrigeration, and charging loads cycling on and off.

The M2 OLED Digital Monitor is a good match for owners upgrading older gauges, builders laying out a cleaner electrical panel, or technicians adding a focused monitor for one system without replacing the entire vessel monitoring setup.

Orders are processed within 2 business days, which includes verification, packing, and dispatch. Orders of $100 or more qualify for free shipping when eligible. For orders under $100, shipping costs are calculated at checkout based on destination, package weight, and selected service. International shipping is available for eligible products, and certain items may require additional handling, warehouse transfers, or may ship directly from the manufacturer, which can affect processing time.

Deliveries are handled by preferred carriers such as USPS, UPS, FedEx, DHL, and others depending on your location and selected service. Estimated delivery times are displayed at checkout and may vary due to customs processing, carrier delays, weather, postal disruptions, or other circumstances beyond our control. Once your order ships, you'll receive a confirmation email with tracking information. Tracking may take up to 24 hours to update on the carrier's website and is also available through your account when applicable.

We ship throughout the United States and to most international destinations for products eligible for international shipping. International orders may be subject to customs duties, taxes, brokerage charges, or other import fees, which are the customer's responsibility and are not included in the product or shipping price. PO Boxes are accepted only when shipping through USPS, and not all packages qualify for this option. If your order does not arrive within the estimated delivery window, please contact us at info@apollolighting.com or +1 (954) 375-0100 so we can assist with locating your package.

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Returns may be requested within 30 days of receiving your order. Items must be unused, uninstalled, unaltered, and returned in their original packaging with all tags, packing materials, blank warranty cards, manuals, instructions, accessories, and included items. Certain products, including installed or used electronics, electrical components, lighting, consumables, custom or special-order items, cut-to-length products, safety equipment, and merchandise exposed to water or marine conditions, may not be eligible for return.

To request a return, sign in to your account and select the applicable order and items, and submit your request for review. Eligible unfulfilled items may also be submitted for cancellation within 1 hour of placing the order. Returns or cancellations are not considered approved until you receive confirmation from Apollo Lighting. Please do not ship or drop off merchandise before receiving return approval and instructions.

Customers are responsible for arranging and paying for return shipping unless the return is due to an error by Apollo Lighting or the item is verified as defective, damaged, or incorrect. Missing, damaged, defective, or incorrect items must be reported within 2 business days of delivery, and photos or other documentation may be required for review. If the issue is verified, Apollo Lighting may provide or reimburse return shipping and issue a replacement or refund depending on the circumstances. International customers are responsible for return shipping, duties, taxes, customs charges, brokerage fees, and other costs associated with an international return.

After your return is received and inspected, approved refunds are issued to the original payment method and may take 5-7 business days to appear after processing. Original shipping and handling charges are nonrefundable, and the value of any included free items that are not returned may be deducted from the refund. Apollo Lighting does not charge a standard restocking fee on eligible returns. Returns that are incomplete, damaged, installed, used, altered, improperly packaged, or otherwise do not meet the eligibility requirements may be refused. We recommend using a trackable and appropriately insured shipping service for all customer-arranged returns.

For assistance, contact info@apollolighting.com or call +1 (954) 375-0100.

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Many products sold by Apollo Lighting include a manufacturer's warranty covering defects in materials or workmanship. Warranty terms vary by brand, product category, and model, so eligibility, coverage duration, exclusions, and available remedies are determined by the applicable manufacturer. We recommend reviewing the warranty information provided with your product before installation or use, especially for marine electronics, navigation equipment, lighting, electrical systems, pumps, safety equipment, and other specialized marine products.

If you need warranty service, the claim must follow the process established by the manufacturer, authorized service center, or designated warranty provider. You may be asked for proof of purchase, a serial number, product registration, photos, maintenance or installation records, or other documentation. Apollo Lighting does not determine or modify a manufacturer's warranty coverage or final claim decision, but we are happy to help provide purchase information and direct you to the appropriate manufacturer or warranty resource.

Keep your receipt, product documentation, serial number information, and original packaging when practical. Damage caused by normal wear, misuse, improper installation, insufficient maintenance, corrosion, impact, unauthorized modifications, electrical issues, or operation outside the manufacturer's specifications may not be covered. Warranty claims are separate from standard returns, so a product that has been installed, used, or exposed to marine conditions may no longer qualify for return while still remaining eligible for evaluation under the manufacturer's applicable warranty.

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