2027 MODEL YEAR · CLASS B MOTORHOME
Interstate 24GT
The Interstate 24GT is designed for maximum comfort. From its large galley to its spacious sleeping quarters and cleverly appointed bathroom, you will find comfort in abundance.
Specifications
- Length
- 24' 6"
- Height
- 9' 9"
- Base weight
- 9,423 lb
- GVWR
- 11,030 lb
- Net Carrying Capacity (NCC)
- 1,607 lb
- Tow capacity
- 5,000 lb
- Chassis
- Mercedes-Benz Sprinter 3500
- Engine
- Mercedes-Benz 2.0L Turbo Diesel I4
- Horsepower
- 208 hp
- Torque
- 332 lb-ft
- Drivetrain
- AWD
- Fuel type
- Diesel
- Transmission
- 9G-TRONIC Plus Automatic
- Sleeps
- 2
- Seats
- 7
- Fresh / gray / black
- 23 / 24 / 11
- Fuel tank
- 24.5 gal
- Solar
- 400 W (standard)
- Battery
- 10.3 kWh
- Inverter
- 3000 W
- Shore power
- 30 A
- Off-grid score
- Moderate
- MSRP
- $285,900
How long off-grid?
Boondocking endurance for this motorhome — modeled from its real 10.3 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
- Maximum comfort in Class B
- AWD standard
- 10.3 kWh lithium + 400W solar
Trade-offs
- Smaller waste tank (11 gal)
- Higher price than Rangeline
