2025 Grand Design Solitude S-Class 2930RL vs 2025 Keystone Alpine 3700FL

Detailed Comparison

Looking at the 2025 Grand Design Solitude S-Class 2930RL alongside the 2025 Keystone Alpine 3700FL? Smart move — comparing specs before you buy is the best way to ensure satisfaction.

In terms of footprint, the Grand Design Solitude S-Class 2930RL stretches 31.5 ft while the Keystone Alpine 3700FL spans 37.5 ft. Weight-wise, the Keystone Alpine 3700FL is the lighter rig at 10,800 lbs versus 13,100 lbs.

For sleeping arrangements, the Grand Design Solitude S-Class 2930RL offers room for 10 and the Keystone Alpine 3700FL can handle 4. The Grand Design Solitude S-Class 2930RL benefits from 5 slide-out(s), expanding the interior when parked.

Looking at self-sufficiency, the Grand Design Solitude S-Class 2930RL packs 92 gal of fresh water and 350W of solar. The Keystone Alpine 3700FL counters with 72 gal fresh water and 450W solar.

Price is often the deciding factor. The Grand Design Solitude S-Class 2930RL starts at $88,000 MSRP, while the Keystone Alpine 3700FL commands $91,000 — a $3,000 gap.

Families with kids will appreciate the extra sleeping capacity and living space. Off-grid campers should pay close attention to solar wattage, battery capacity, and tank sizes. Full-timers should prioritize tank capacity, storage, and overall living comfort.

Both options have earned their place in the market. Your trip style and budget should be the final tiebreakers.