Blue Sea Systems — Water-Resistant Accessory Panel, 12V Socket, Dual USB & Voltmeter — BSS-4366

Blue Sea Systems 4366 Water-Resistant Accessory Panel with 12V Socket, Dual USB Charging, and Mini Voltmeter

Upgrade your console with a water-resistant Blue Sea Systems 4366 accessory panel that combines a protected 12V outlet, dual USB charging, and a mini voltmeter in one panel. It is built around an illuminated 15A circuit breaker switch and a pre-wired harness, so you can keep an eye on battery voltage while charging phones and tablets at the dash.

Key Features

• Water-resistant USB accessory panel with circuit breaker, 12V socket, dual USB charger, and mini voltmeter
• Illuminated Carling Technologies 15A circuit breaker switch lets you shut off the panel to prevent parasitic draw
• Pre-wired harness included to simplify installation
• Silicone breaker boots and a panel gasket help protect against water ingress
• Polycarbonate/ABS panel face is UV-stabilized, flame retardant, and will not corrode
• Panel dimensions: H 2.25" x W 6.6" x D 2.75" (57 mm x 168 mm x 70 mm)
• 12V DC only

Compatible Applications

• Marine accessory panel mounting for 12V DC electrical systems
• Dash and console accessory charging for smartphones and tablets where a 12V DC panel outlet is available
• General 12V accessory control, charging, and voltage monitoring in damp or splash-prone installations

Product Details

• Part number: 4366
• Brand: Blue Sea Systems
• Product type: water-resistant USB accessory panel
• Circuit breaker: illuminated Carling Technologies 15A circuit breaker switch
• Charging: 12V socket plus dual USB charger
• Monitoring: mini voltmeter
• Water-resistant protection: silicone breaker boots and panel gasket
• Panel face material: polycarbonate/ABS, UV-stabilized, flame retardant, non-corroding
• Dimensions: H 2.25" x W 6.6" x D 2.75" (57 mm x 168 mm x 70 mm)
• Wiring: pre-wired harness included
• Electrical system: 12V DC only

Technical FAQ

Does this panel include a circuit breaker? Yes. It has an illuminated 15A circuit breaker switch, so you can shut the panel off and prevent parasitic draw on the battery.

What can it charge and power? The panel provides a 12V socket and dual USB chargers for phones, tablets, and other small 12V devices.

What does the mini voltmeter show? It displays system voltage at the panel, so you can monitor battery state while accessories are running.

Is the panel fully waterproof? It is water-resistant, not fully waterproof. Silicone breaker boots and a panel gasket help protect against water ingress when the panel is installed with the gasket correctly seated.

What voltage does it support? 12V DC only. Do not connect the panel to a 24V DC system.

Related Products

• Blue Sea Systems 4363 — the same panel family with a USB charger and 12V socket, without the voltmeter.
• Blue Sea Systems 4365 — the same panel family with a 15A breaker, 12V socket, and dual 2.1A USB chargers, without the voltmeter.
• Blue Sea Systems 4364 — the water-resistant panel with a 15A breaker and two blank apertures instead of a socket and USB chargers.
• Blue Sea 4321 — a larger water-resistant 4-position breaker switch panel with a 12V socket and dual USB charger.
• Vertex Dual USB-A & USB-C 12V Power Socket — a single-socket charging option with a different connector layout.
• Marinco Combo Dual USB & 12V Socket — a single-socket charging option with a different connector layout.

Parts Desk Insights

Best use case: Replacing or upgrading a compact dashboard or console accessory area with one panel that provides protected switch control, a 12V outlet, dual USB charging, and at-a-glance voltage monitoring.

Most common customer mistake: Assuming the panel is fully waterproof. Water-resistant protection depends on the panel gasket and breaker boots being correctly seated during installation, so take care with sealing when mounting the panel. The panel is also 12V DC only and must not be connected to a 24V system.

Sizing and fitment guidance: Check the available cutout space and mounting depth at your dash before ordering; the panel measures H 2.25" x W 6.6" x D 2.75". If you are replacing an older panel, compare the number of apertures and the breaker rating so the replacement matches the accessories you plan to keep connected.