2027 MODEL YEAR · CLASS B+ MOTORHOME
Atlas 25RT
- adventure
- couples
- off-grid
The Airstream Atlas 25RT blends refined interiors, a rear pass-through garage, and confident Mercedes-Benz performance.
Specifications
- Length
- 24' 9"
- Height
- 10' 6"
- Base weight
- 9,965 lb
- GVWR
- 12,125 lb
- Net Carrying Capacity (NCC)
- 2,160 lb
- Tow capacity
- 4,000 lb
- Chassis
- Mercedes-Benz Sprinter 4500
- Engine
- Mercedes-Benz 2.0L Turbo Diesel I4
- Horsepower
- 208 hp
- Torque
- 332 lb-ft
- Drivetrain
- RWD
- Fuel type
- Diesel
- Transmission
- 9G-TRONIC Plus Automatic
- Sleeps
- 2
- Seats
- 3
- Fresh / gray / black
- 23 / 31 / 27
- Fuel tank
- 24.5 gal
- Solar
- 400 W
- Battery
- 6.9 kWh
- Inverter
- 3000 W
- Shore power
- 30 A
- Off-grid score
- 60 / 100
- MSRP
- $289,900
How long off-grid?
Boondocking endurance for this motorhome — modeled from its real 6.9 kWh battery, 400 W solar, and 23 gal fresh tank.
Fresh water fills first under these assumptions.
How this is calculated
Power: usable battery = nameplate kWh × 0.8 (blended depth-of-discharge). Daily load presets — light ≈ 1,500, moderate ≈ 2,800, heavy ≈ 5,000 Wh/day — from published boondocking power budgets, excluding air conditioning (no motorhome house battery runs rooftop AC for long). Solar harvest = panel watts × peak-sun-hours (summer 5.5, spring/fall 4.0, winter 2.5) × 0.7 system derate. Water: per-person daily use (light 3 / moderate 5 / heavy 8 gal fresh; gray ≈ 80% of fresh; black from toilet use) against the real tank sizes. Endurance is whichever runs out first. Estimates for planning — your real usage varies.
Strengths
- Rear pass-through garage for gear
- Premium Mercedes-Benz diesel chassis
- Strong tow capacity (4,000 lb)
Trade-offs
- Lower battery capacity than 25MS
- RWD only (no AWD option)
Gallery
