# MDC USA XL15-4E MKII Base

XL15-4E MKII Base is a travel trailer floor plan by MDC USA.

## Specs (2026 model year)

| Spec | Value |
| --- | --- |
| Length | 24 ft |
| Sleeps | 4 |
| Slide-outs | 4 |
| Dry weight | 5,032 lbs |
| GVWR | 6,147 lbs |

## Model years

2026. Year-specific specs: `https://rvenvy.com/travel-trailers/mdc-usa/xl15-4e-mkii/base?year={year}`

## Overview

The XL15-4E MKII Base is built around genuine off-grid capability, 700W of solar panels, a LiFePRO+® 200Ah lithium iron phosphate battery, a 2000W pure sine wave inverter, and cold-weather tank heating all come standard, so you're not piecing together an upgrade list later. Sleeping four is handled by an Olympic Queen innerspring mattress up front and two twin XL foam bunks in back, while the Dometic Penguin II rooftop air conditioner and Truma Aquago instant hot water system keep comfort firmly in the picture. The external slide-out stainless steel kitchen with a propane cooktop and plumbed sink is a standout feature for camp cooking without crowding the interior. Trail-Assure™ electronic stability control, X-TRACK independent coil spring suspension, and dual spare wheels round out a setup that earned MDC an RV News Adventure Trailer of the Year award, and owners back that up, consistently praising how well it tows and how ready it is right out of the box.

## Inventory

No units currently for sale. Search similar inventory: https://rvenvy.com/inventory

Floor plan diagram: https://images.rvenvy.com/c061289988573812c8629e677a3adb27ab50252ea4626cc14f178650e44660a0/1024.webp

Canonical page: https://rvenvy.com/travel-trailers/mdc-usa/xl15-4e-mkii/base