MECMO SS2-50P to 14-50R 50A Adapter Cord — 50 Amp Marine-to-RV/EV, 10 AWG STW Weather-Resistant

MECMO's SS2-50P to 14-50R adapter cord converts a 50A marine shore power twist-lock outlet to a 4-prong 50A RV/EV (Tesla-style) receptacle for reliable 125/250V shore-to-vehicle charging and power supply.

When docking a boat, parking an RV at a marina slip, or using a generator, mismatched shore power plugs can block access to the power you need. This heavy-duty adapter cable bridges that gap by linking a marine SS2-50P (twist-lock) shore inlet to a 14-50R 4-prong RV/EV outlet, supporting up to 50 amps and both 125/250 volts. Built with molded grips and 10 AWG copper conductors, it’s designed for secure connections in wet or high-use environments without modifying existing shore or vehicle wiring.

How does this adapter handle 50 amp shore power safely?

The MECMO adapter is rated for up to 50 amps and 125/250 volts, using STW 10 AWG copper conductors and molded housings to reduce strain and exposure. The twist-lock SS2-50P male plug and the 14-50R female receptacle are built for repeated insertion and removal while maintaining a tight, low-resistance connection.

• 50A max load, 125/250V capacity for shore, generator, or EV/RV use
• STW-rated 10 AWG copper wire for consistent current flow
• Molded grips and locking ring for secure, weather-tolerant coupling

Will this let me plug an RV or Tesla EV into a marina power post?

Yes — the adapter accepts a marine SS2-50P twist-lock shore plug and provides a 4-prong 14-50R receptacle compatible with many RVs and Tesla EV charging cords that use the 14-50 form factor. It simply converts plug formats; it does not alter voltage or change onboard charging behavior.

• Converts SS2-50P shore outlet to 14-50R vehicle/RV/EV inlet
• No internal transformers or voltage conversion — pass-through wiring only
• Easy push/pull 14-50R handle for fast hookups and removal

What build features improve durability and user convenience?

The adapter uses molded casings for both ends to offer a firm grip and protect the terminals from mechanical stress. The twist-lock design on the marine plug and the ergonomic handle on the 14-50R receptacle make connection secure and simple, while the STW cable rating resists oil, water, and abrasion common around docks and campsites.

• Molded, non-slip housings for secure handling and protection
• Locking ring on SS2-50P ensures twist-lock retention under load
• STW 10 AWG insulation for flexible, weather-resistant performance

How do I confirm compatibility before buying?

Check the shore power inlet on the dock or generator for an SS2-50 (twist-lock) receptacle and verify your RV or EV charging cord uses a 14-50 plug. Ensure your vehicle and shore source are rated for 50A 125/250V and that breakers and wiring at both ends match that capacity.

• Confirm shore outlet is SS2-50 (50A twist-lock) style
• Confirm your vehicle/RV charger uses a 14-50 4-prong plug
• Verify breakers and wiring are rated for 50A continuous use

Who is this for: MECMO’s SS2-50P to 14-50R adapter cord is aimed at boaters, RV owners, and EV drivers who need a dependable, heavy-duty adapter to connect 14-50 vehicle plugs to 50A marine or generator twist-lock outlets. It’s suited for marinas, campgrounds, and mobile setups where a secure, high-current connection is required without rewiring equipment.