Reverse Polarity Alarm
Reverse Polarity Alarm – Essential Power Safety Indicator for Marine Shore Power Connections
The Raritan Reverse Polarity Alarm is a must-have safety device for boaters connecting to unfamiliar or unregulated dockside power sources. Formerly known as the SPI (Shore Power Indicator), this compact unit offers instant visual warning when electrical polarity is reversed—helping prevent dangerous onboard electrical issues that can damage equipment or compromise onboard safety.
When plugging into shore power at marinas, especially while cruising unfamiliar regions or international waters, incorrect wiring at the dock is more common than most boaters realize. Reverse polarity occurs when the hot and neutral wires are switched, creating potential hazards including electric shock risk and malfunctioning appliances. Without a clear indicator, this dangerous condition can go completely undetected—until it’s too late.
The Raritan Reverse Polarity Alarm provides real-time LED indication of polarity status, alerting you immediately if the incoming power is unsafe. This early warning allows boaters to disconnect and notify the marina or troubleshoot before exposing onboard electrical systems to damage.
Compact and easy to install, this alarm is ideal for any vessel that relies on shore power—including sailboats, trawlers, power yachts, and houseboats. The unit is hardwired into the AC power panel, providing constant monitoring whenever connected to dock power. With its straightforward design and marine-grade durability, it’s a simple but vital addition to any onboard electrical system.
Whether cruising the Great Lakes, Gulf Coast, Pacific Northwest, or the Caribbean, the Reverse Polarity Alarm gives you peace of mind at every port. It's a smart investment in safety that helps safeguard your family, guests, and electronics from one of the most overlooked hazards in marine environments.
Don’t risk silent system damage or costly repairs. Add the Raritan Reverse Polarity Alarm to your AC panel and protect your vessel from the unknowns of dockside power—before problems start.
