2025 Grand Design Solitude 390RK vs 2025 Grand Design Solitude S-Class 2930RL

Detailed Comparison

Two popular options on many shoppers' shortlists — the 2025 Grand Design Solitude 390RK and the 2025 Grand Design Solitude S-Class 2930RL. Let's see how they compare across the specs that matter most.

Dimensionally, you're looking at 30.5 ft for the Grand Design Solitude 390RK and 31.5 ft for the Grand Design Solitude S-Class 2930RL. The Grand Design Solitude 390RK carries an extra 2,300 lbs, which affects tow vehicle requirements and fuel economy.

The Grand Design Solitude 390RK sleeps 10 while the Grand Design Solitude S-Class 2930RL accommodates 10. Slide-outs play a role in livability: the Grand Design Solitude 390RK has 4 and the Grand Design Solitude S-Class 2930RL has 5.

For boondocking enthusiasts, tank sizes matter. Fresh water capacity goes to the Grand Design Solitude S-Class 2930RL at 92 gallons versus 70 gallons. Solar-wise, you get 400W on the Grand Design Solitude 390RK and 350W on the Grand Design Solitude S-Class 2930RL. Battery banks are 300 Ah and 400 Ah.

At $62,000 MSRP for the Grand Design Solitude 390RK and $88,000 for the Grand Design Solitude S-Class 2930RL, the Grand Design Solitude 390RK saves you $26,000.

If you're traveling with a family, look for the model with more sleeping positions and better storage. Boondockers: look at the fresh water capacity and solar/battery systems — they determine how long you can stay out. For the full-time RV lifestyle, every gallon of tank capacity and every inch of counter space counts.

Remember, the perfect RV is the one you'll actually use. Pick the one that excites you most and hit the road.