2026 Grand Design Solitude380FL

The 380FL inverts the usual fifth-wheel layout. Instead of a rear living room, the lounge moves to the front, up in the raised section over the pin, where a front-cap windshield and five slide-outs open a separate upper living room with double tri-fold hide-a-bed sofas and theater seating. Behind it sit a full central kitchen with an island, a private bedroom and the plan’s signature — a bath-and-a-half, with a dual-sink vanity and a second half bath for guests and full-timers.

Five slides is the most living space in the standard line, and the holding tanks are scaled to match: a 106-gallon black tank serves the second bath, the largest black capacity of the lighter plans. RVUSA lists a published 19,000-pound GVWR against a 14,866-pound dry weight, leaving a 4,134-pound payload and a 3,052-pound dry pin, on the standard Solitude build with a single 30,000-BTU air conditioner, a 20-cubic-foot 12-volt refrigerator and 330-watt roof solar.

At an MSRP of $163,610 it sits among the upper plans in the line. For a couple or a pair of couples who want the biggest, brightest front living space and a second bath — and who tow with a properly rated three-quarter-ton or one-ton truck — the front-living 380FL is the entertainer’s Solitude.

Solitude is Grand Design's flagship fifth wheel and one of the best-selling luxury extended-stay fifth wheels in North America. The line runs to ten floorplans for 2026; the eight highest-demand layouts are profiled here in full, and the remaining two are catalogued on the line hub. The 380FL on this page is highlighted; each other profiled plan links to its own page.

This floorplan carries its water comfortably. A full 81-gallon fresh tank is roughly 16% of the 4,134-pound cargo capacity, leaving the 380FL with a usable gear budget even when you tow full.

The published dry pin weight of 3,052 pounds is 21% of this floorplan’s 14,866-pound dry weight. Fifth-wheel pin weight rides in the bed of the truck, so it comes off payload rather than off tow rating — and it rises with the trailer as you load it, not in proportion to what you put over the axles.

Nothing above changes the ceiling. Loaded to its 19,000-pound GVWR the 380FL is towing 4,134 pounds more than its 14,866-pound dry figure, and that is the number your vehicle has to be rated for — not the brochure weight.

Tank balance is generous here: 81 gallons of fresh against 106 grey and 106 black, so waste capacity keeps pace with supply and the fresh tank is the constraint that ends a dry stay.

Ranked by GVWR, the 380FL sits 4 of 10 in the Solitude line: 19,000 pounds against a line that runs from 19,000 to 23,500 pounds. That position is the useful thing to know, because the plans immediately either side of it are the real alternatives.

Either side of it in the same line: Solitude 376RD matches it exactly at 19,000 lb GVWR; and Solitude 382WB matches it exactly at 19,000 lb GVWR.

8 other Solitude plans share this floorplan’s 19,000 lb GVWR, so the ranking above separates plans that tow to the same ceiling. On a shared chassis the figure that actually differs between them is cargo capacity and where the weight sits, not the rating.

Against the 380FL: the Influence 3804DS is 1 ft longer; the Momentum 344M is 1 ft shorter. Those are differences in the published numbers only — what they cost, how they are built and how they live are separate questions each of those pages answers on its own terms.

Those are the nearest fifth wheels from other lines by weight — one per line, picked by proximity on that figure and nothing else. They are listed so the same tow vehicle can be checked against real alternatives, not because they are equivalent inside; layout, build and price diverge sharply across that group.

For scale, the Solitude floorplans profiled here run 12,100 to 19,000 pounds dry and 34 to 43 feet of exterior length across 10 plans. Where a floorplan falls in that spread usually says more about which vehicle can tow it, and which site it fits, than the layout name does.

Every profiled floorplan in this line, with the full weight table, is on the Solitude line hub.

This catalog tracks 18 specification fields per floorplan. Named sources publish 18 of them for the 380FL. The rest are not shown, because the alternative is reading a figure across from a sibling floorplan or from what the segment usually does — and a number nobody published is worth less than an admitted gap.

Not published for this floorplan: tire size (a tire description is published, a size is not). If you find one of these in a manufacturer document for this plan, it belongs on this page.

The completeness figure at the foot of this page (98%) measures the same thing on the full field set: it is a measurement of how much this floorplan’s manufacturer publishes, not of how much research went into the page.

How every figure here was sourced and checked is set out on the methodology page.