MECMO 50A 125/250V Twist-Lock Shore Power Inlet SS2-50P — UV-Resistant Flanged Receptacle with Waterproof Cover

This heavy-duty flanged inlet replaces worn or damaged SS2-50 receptacles and gives you a secure, watertight shore power entry point. Built with UV-resistant housing, nickel-plated copper contacts, and an integrated gasket, it’s designed for marine and RV environments where reliable power and protection from the elements matter. The inlet accepts standard CS6364 connectors and installs in a 2-11/16" cutout, making it a direct retrofit for common shore power openings.

How does this inlet handle outdoor and marine exposure?

The MECMO inlet uses a combination of materials and mechanical seals to resist sun, rain, and salt spray without additional caulking. The cover swings 180° and locks out of the way, while the threaded collar secures the connection against moisture intrusion.

• UV-resistant ABS housing prevents sun degradation
• Nickel-plated copper poles resist corrosion from salt and moisture
• Integrated gasket and flanged base create a weathertight seal
• Threaded collar and twist-lock mating ring keep connections sealed under load

What electrical capacity and compatibility does it offer?

This inlet is rated for 50 amps at 125/250 volts, giving you up to 12,500 watts to run appliances and chargers simultaneously. It’s ETL-listed for safety and designed to accept the standard CS6364/SS2-50R locking plug used on most 50A RV and marine shore power cords.

• Rated 50A, 125/250V, 12,500W for high-demand circuits
• Compatible with CS6364/SS2-50R male locking plugs
• Clearly marked terminals accept #10–6 AWG copper conductors
• ETL listing and flame-retardant materials for safe installations

How simple is installation and replacement?

The flanged design fits the industry-standard 2-11/16" cutout, so it replaces existing SS2-50-style inlets without special adapters. The mounting gasket removes the need for messy sealants, and terminal markings make wiring straightforward for installers and DIYers familiar with RV or marine electrical work.

• Flanged mounting for flush, clean installation in standard cutouts
• Built-in gasket provides a tight seal without silicone or caulk
• Terminal markings guide wiring for #10–6 AWG copper conductors
• Cover design holds open 180° to prevent cord pinching during use

Will it stand up to heavy use and vibration onboard?

Yes — the inlet’s materials and locking mechanism are chosen to maintain contact and resist wear from repeated connection cycles and motion. The twist-lock interface and threaded collar keep the plug snug even with onboard vibration and movement.

• Durable ABS housing resists impact and flex under load
• Nickel-plated contacts reduce wear and maintain conductivity
• Twist-lock connection prevents accidental disconnects in transit
• Cover and collar designed to withstand repeated use and movement

Who is this for? Owners and maintainers of RVs, fifth wheels, motorhomes, yachts, boats, and caravans who need a robust replacement or upgrade for a 50A shore power inlet will find the MECMO SS2-50P well suited to their needs. It’s aimed at installers and DIYers seeking an ETL-listed, weatherproof inlet that simplifies wiring, resists harsh outdoor conditions, and accepts industry-standard locking plugs for reliable shore power hookup.