stio 20A 125V Shore Power Inlet Plug with 4ft 12AWG Dual Cord and 5-in-1 Adapter — Weatherproof Flush-Mount

The stio 20A 125V AC shore power inlet is a heavy-duty, weatherproof plug assembly with a 4-foot 12AWG dual cord and a 5-in-1 T-blade adapter to fit multiple NEMA connectors.

This compact inlet assembly combines a flush-mount outdoor receptacle, an integrated Y-split dual cord, and a versatile adapter kit so you can connect RVs, boats, trailers, and portable equipment to shore power without custom wiring. Built from high-conductivity copper and durable nylon, the unit is rated for 20 amps and designed to resist rain, snow, and freezing conditions while simplifying shore power hookups.

How does this inlet simplify connecting to different shore power plugs?

stio’s 5-in-1 adapter means one outlet can accept five common NEMA plug types, reducing the need to carry multiple connectors. The female side accepts NEMA 1-15P, 5-15P, 5-20P, 6-15P and 6-20P plugs, so you can adapt to campsites, marinas, garages, or generator outputs quickly.

• Includes five blade adapter ends for broad compatibility.
• Works with 110–250V devices if the device supports wide-voltage operation.
• Eliminates separate adapter boxes and reduces packing space.

Is the unit durable and safe for outdoor use?

The inlet housing is made from weather-resistant nylon and uses quality copper conductors rated 12 AWG to keep conductivity high and heat low under load. A pressure-fit rubber cap seals the receptacle when not in use, protecting contacts from moisture, ice, and salt spray.

• IP-style waterproof cap for rain and snow protection.
• 12 AWG heavy-duty copper wiring reduces voltage drop on typical RV circuits.
• Rugged nylon construction stands up to UV and impact exposure.

How easy is installation and setup?

This is a plug-and-play flush-mount inlet designed for a 2-inch panel hole, so no internal rewiring or cable splicing is required for most installs. The flange mounts securely and the Y-split dual cord provides extra reach without adding separate extension cables.

• Flush-mount flange fits a 2-inch cutout for quick installation.
• Prewired 4-foot dual cord and splitter reduce installation time.
• No hand wiring or electrical modifications needed for typical shore-power connections.

What devices and vehicles are compatible with this inlet?

This inlet is built to serve a wide range of mobile and outdoor power needs—from RVs and trailers to boats, golf carts, small cabins, and portable generators—making it a flexible choice for seasonal and year-round use. Check your device voltage acceptance before using the 6-15 or 6-20 adapter shapes.

• RV shore power connections and marine dock hookups.
• Utility trailers, pickup campers, and tailgate power needs.
• Garden sheds, cabins, and outdoor equipment requiring protected inlets.

Who is this for: The stio 20A 125V shore power inlet is ideal for RV owners, boaters, trailer users, and anyone who needs a reliable outdoor power inlet that supports multiple plug types without extra wiring. If you want a robust, weatherproof connection with the flexibility to accept common NEMA plugs and quick installation, this inlet is a practical, space-saving solution.