Grand Design Solitude
30 floorplansFifth wheel2015– (in production)Better build tier
Grand Design (Better tier): Solitude is Grand Design's full-profile flagship: R-11 welded-aluminum laminated walls, 101" widebody chassis, MORryde independent suspension and 17.5" H-rated tires — genuine full-time-capable construction.
What one actually costs today: $81,300–$203,900 across the line, new sticker or used estimate per model.
THE FLOORPLANS — 30
| MODEL | YEARS | LENGTH | GVWR | SLEEPS | PRICE TODAY | FINDING ONE |
|---|---|---|---|---|---|---|
| 305RE | 2015–15 | 35.9 ft | 16,000 lb | 4 | — | Patient search |
| 310GK | 2017– | 34.3 ft | 19,000 lb | 4 | $157,200 | Common |
| 344GK | 2018–20 | 36.9 ft | 16,800 lb | 6 | — | Findable |
| 345GK | 2021–23 | 37.2 ft | 16,800 lb | 4 | — | Findable |
| 366DEN | 2015–16 | 40.3 ft | 16,000 lb | 5 | — | Patient search |
| 370DV | 2024– | 37.8 ft | 19,000 lb | 4 | $161,800 | Findable |
| 372WB | 2019–22 | 41.3 ft | 16,800 lb | 4 | — | Findable |
| 373FB | 2018–23 | 41.3 ft | 16,800 lb | 4 | — | Findable |
| 374TH | 2017–19 | 41.3 ft | 20,000 lb | 6 | — | Findable |
| 375RES | 2017–22 | 41.3 ft | 16,800 lb | 6 | $98,100used est. | Findable |
| 376RD | 2023– | 42.5 ft | 19,000 lb | 6 | $176,600 | Findable |
| 377MBS | 2017–20 | 41.3 ft | 16,800 lb | 10 | — | Findable |
| 378MBS | 2021–24 | 40.2 ft | 18,000 lb | 8 | — | Findable |
| 379FLS | 2017–19 | 42.5 ft | 16,800 lb | 6 | — | Findable |
| 380FL | 2020– | 41.3 ft | 19,000 lb | 6 | $179,200 | Findable |
| 382WB | 2020– | 41.3 ft | 19,000 lb | 6 | $181,500 | Findable |
| 384GK | 2016–19 | 40.6 ft | 16,800 lb | 4 | — | Findable |
| 385GK | 2020–20 | 40.5 ft | 16,800 lb | 6 | — | Patient search |
| 388MBS | 2025–26 | 42.9 ft | 19,000 lb | 5 | $142,400used est. | Patient search |
| 390RK | 2020– | 42.4 ft | 19,000 lb | 6 | $178,700 | Findable |
| 391DL | 2023–26 | 42.4 ft | 19,000 lb | 6 | $141,500used est. | Findable |
| 414LJMJ | 2026– | 42.8 ft | 23,500 lb | 6 | $203,900 | Patient search |
| 417KB | 2025– | 41.7 ft | 19,000 lb | 6 | $155,100 | Findable |
| 2930RL | 2020–24 | 34.3 ft | 15,000 lb | 2 | $81,300used est. | Findable |
| 3330RE | 2022–24 | 37.9 ft | 16,800 lb | 6 | — | Findable |
| 3460FL | 2023–24 | 37.9 ft | 16,800 lb | 6 | $89,300used est. | Patient search |
| 3540GK | 2021–22 | 38.3 ft | 16,800 lb | 4 | — | Findable |
| 3550BH | 2020–22 | 39.8 ft | 16,800 lb | 8 | — | Findable |
| 3740BH | 2019–24 | 40.3 ft | 16,800 lb | 8 | $86,600used est. | Findable |
| 3950BH | 2020–24 | 40.3 ft | 16,800 lb | 7 | $89,200used est. | Findable |
THE LINE, YEAR BY YEAR
Assembled from eight-plus model years of brochures, floorplan by floorplan. This is the part a spec sheet can't tell you: which years changed, and which year is the buy.
- 2015Introduced in the first Solitude lineup
- 2015Predecessor 379FL introduced with a 16,000 lb GVWR
- 2016Discontinued
- 2016Predecessor 377MB introduced with a 16,000 lb GVWR
- 2016Introduced
- 2017Introduced at 34' 11", 15,000 lb GVWR and 12,100 lb dry
- 2017Introduced
- 2017Introduced at 16,500 lb GVWR with 2,300 lb cargo capacity
- 2017Renamed 377MBS; GVWR raised to 16,800 lb
- 2017Renamed 379FLS; GVWR raised to 16,800 lb
- 2018Introduced
- 2019Introduced
- 2019Discontinued
- 2020Replaced by the 380FL
- 2020Introduced, replacing the 379FLS
- 2020Introduced, replacing the 372WB
- 2020Replaced by the 385GK
- 2020Introduced and discontinued in the same model year
- 2020Introduced
- 2020Introduced in the S-Class Edition
- 2021Replaced by the 345GK
- 2021Introduced, replacing the 344GK
- 2021Replaced by the 378MBS
- 2021Introduced with an 18,000 lb GVWR, up from the 377MBS
- 2022Discontinued in favour of the 382WB
- 202216,800 lb GVWR with 2,600 lb cargo capacity by the final year; MSRP $140,648
- 2022Discontinued after the 2022 model year — the 376RD took its slot for 2023
- 2023Discontinued
- 2023Introduced
- 2023GVWR raised to 19,000 lb
- 2024Length trimmed to 34' 4"
- 2024Replaced by the 370DV
- 2024Introduced
- 2024Sold as the 41KB with an 18,000 lb GVWR
- 2024Final model year; still shown on Grand Design's S-Class archive page
- 2025GVWR raised from 15,000 to 19,000 lb — cargo capacity jumps from 2,900 to 6,900 lb; MSRP $139,400
- 2025Replaced by the 388MBS
- 2025Introduced, replacing the 378MBS
- 2025Renamed 417KB; GVWR raised to 19,000 lb
- 2026MSRP $141,620
- 2026Introduced
- 2027Dry up to 13,200 lb; MSRP $157,160
- 2027Moved to dealer-stock-only status
Which Solitude is the right one — if any?
A line this size hides real differences behind similar names. Set what you care about — weight, bunks, build, budget — as sliders, and watch every floorplan here get ranked against the whole market, not just against each other.
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