Blue Sea 4365 USB Panel, 15A Circuit Breaker

The Blue Sea Systems 4365 is a water-resistant panel with a 15A breaker switch, a 12V socket and two 2.1A dual USB chargers, without a voltmeter.

Four USB ports and no voltmeter is what separates this from the rest of the range. On a boat that already has battery monitoring elsewhere, the voltmeter position is better spent on charging capacity than duplicating a reading available on another panel.

Each charger is 2.1A, which is enough to charge a tablet at a useful rate rather than trickling it. Lower-rated USB outlets keep a device from going flat without meaningfully charging it, which becomes obvious on a long day when a chartplotting tablet is in use.

The illuminated Carling Technologies 15A breaker switch shuts the panel off entirely, stopping the parasitic draw USB chargers produce when powered. Water-resistant construction suits an exposed helm or cockpit position. Explore more marine circuit breakers.

• Four USB ports, no voltmeter
• Better than duplicating a reading elsewhere
• 2.1A charges a tablet rather than trickling it
• Lower-rated outlets only stop a device going flat