Aboard T4 · Range-Extended Electric Travel Trailer
Aboard T4
Development Update
Planned Specifications & Features
Planned features and specifications. Entry-level equipment and pricing are still being finalized.
This update outlines the equipment and capabilities currently planned for the T4—not the final equipment list for the entry-level model. We’re prioritizing features and equipment to make the entry-level T4 lighter and more accessible, targeting a starting price close to $80,000. We’re refining the configurations and pricing as this work progresses.
25′ 2″Length* Numbered notes provide development and validation updates. “Planned” indicates equipment currently intended for the T4. Inclusion in the entry-level model is still being determined. Optional equipment is listed separately. Specifications reflect the current development stage. Converted measurements are approximate.
Dimensions & weight
Energy & power
- Energy architecture
- Range-extended electric
- Total onboard energy (fuel + battery)
- 200+ kWh
- LFP battery capacity
- 41 kWh
- Onboard generator
- Up to 50 kW · 1.5L gasoline
- Fuel tank
- ≈13.2 gal
- Rooftop solar
- 600 W*3
- Charging inlet
- NACS
- DC fast charging
- Supported
- AC charging
- Level 1 / Level 2
- DC output for EV charging
- Up to 50 kW*4
- 240 V exterior outlet
- 1 × NEMA 14-50R*5
- 120 V exterior outlets
- 4
- 120 V interior outlets
- 12
- USB-C chargingNEW
- Throughout the cabin
Towing & chassis
- Hitch ball size
- 2-5/16 in
- Maximum towing articulation angle
- 55°
- Suspension
- Tandem-axle independent trailing-arm suspension with anti-roll bar
- Tires
- 225/75R16 · all-season
- Wheels
- Aluminum*6
- Tire pressure monitoring system (TPMS)
- Planned
- Drive motor
- PMSM · 90 kW peak*7
- Regenerative brakingNEW
- Planned
- Braking system
- Electromechanical brakes (EMB)
- Ground clearance
- ≈13.6 in
- Departure angle
- 12.5°
- Powered tongue jack with jockey wheel
- Planned
- Automatic leveling jacks
- Planned
- Electronic parking brakeNEW
- Planned
- Rear hitch receiver
- Planned*8
Water & plumbing
- Fresh water capacity
- ≈52.8 gal
- Hot water storageNEW
- ≈7.4 gal
- Gray water capacity
- ≈34.3 gal
- Black water capacity
- ≈29.9 gal
- Storage-based instant hot water system
- Planned
- Cold-weather freeze protectionNEW
- Designed for −4°F*9
- Exterior hot/cold water quick-connectNEW
- Planned
- Electrically operated waste discharge system
- Planned
- Black and gray tank flush connections
- Planned
- Exterior shower bracketNEW
- Planned
Climate & comfort
- Heat pump heating & air conditioning
- 10 kW*10
- Radiant floor heatingNEW
- Planned
- Climate zones
- Single-zone
- Climate controls
- Automatic
- Cooling capacity
- 23,885 BTU/h
- Heating capacity
- 27,297 BTU/h
Kitchen & appliances
Living & storage
- Sleeping capacity
- Up to 4 adults
- Front convertible dinetteNEW
- Contoured queen-size bed
- Rear convertible dinetteNEW
- Near residential queen
- Front dinette table
- Height-adjustable, 4-way sliding
- Entry grab handlesNEW
- Planned
- Window shades throughout
- Planned
- Smart interior lighting
- Planned*13
- Bathroom layout
- Dry bath
- Bathroom access
- Interior & direct exterior access
- Electric macerating toilet
- Planned
- Front interior storageNEW
- ≈5.6 cu ft
- Rear modular storageNEW
- ≈8.9 cu ft
- Bathroom storage
- ≈2.6 cu ft
- Exterior pass-through storageNEW
- Planned
- Exterior storage capacityNEW
- ≈11.3 cu ft
Body & exterior
- Body frame
- Aluminum cage frame
- Exterior panels
- Automotive-grade stamped aluminum
- Roof construction
- SMC composite
- Body insulation
- Composite fiber insulation
- Dual entry doors
- Automotive-grade stamped aluminum
- Door features
- Dual seals · soft-close
- Powered entry step
- Planned
- Powered split tailgate
- Planned
- Window glass (living areas)
- Laminated acoustic, heat-insulating privacy glass*14
- Operable kitchen window with integrated insect screenNEW
- Planned
- LED tail lights
- Planned
- LED entry step lighting
- Planned
- LED storage lightsNEW
- Planned
- Hitch & stabilizer lightingNEW
- Planned
Technology & safety
- Active tow assist
- Planned
- Tow-force sensing
- Three-axis force sensor
- Tongue weight monitoringNEW
- Planned
- Remote-controlled maneuvering
- Planned
- 360° camera system
- Planned
- Surround ultrasonic sensors
- Planned
- One-touch camp setup
- Planned*15
- Integrated touchscreen control panelNEW
- Planned
- App monitoring & control
- Planned
- Starlink compatibility
- Supported
- Anti-lock brakes (ABS)
- Planned
- Trailer sway controlNEW
- Under validation*16
- Safety & environmental monitoringNEW
- Planned*17
Available options
Specification notes
These notes outline ongoing validation, configuration decisions and the next details to be confirmed.
- *1Vehicle weights
We’re optimizing dry weight, GVWR and tongue weight for better compatibility with full-size SUVs. Updated figures will be shared once confirmed.
- *2Cargo capacity
We’re targeting 1,200 lb of cargo capacity and confirming the final figure alongside production weight and equipment.
- *3Rooftop solar
We’re targeting 600 W of rooftop solar, with rated output and electrical configuration being confirmed.
- *4DC output for EV charging
Vehicle compatibility testing is ongoing.
- *5240 V exterior outlet
Development and testing are underway to confirm the configuration and available output power of the exterior 240 V NEMA 14-50R outlet.
- *6Wheels
Aluminum wheels are planned, with the design and manufacturing process being finalized.
- *7Drive motor
We’re targeting 90 kW of peak motor power, with production output being confirmed.
- *8Rear hitch receiver
Receiver size is being confirmed.
- *9Cold-weather freeze protection
Freeze-protection performance and operating limits are undergoing validation.
- *10Heat pump heating & air conditioning
The basis of the 10 kW rating is being confirmed.
- *11Refrigerator / freezer
Approximately 6 cu ft is the current refrigerator-capacity target. The team is optimizing appliance fit and confirming capacity and compartment layout.
- *12Kitchen ventilation
An exhaust fan is planned for kitchen ventilation, with the final configuration being confirmed.
- *13Smart interior lighting
Lighting scenes and system configuration are being finalized.
- *14Window glass (living areas)
Laminated acoustic, heat-insulating privacy glass is fitted to windows in the living areas.
- *15One-touch camp setup
One-touch camp setup is planned. The included functions and operating sequence are being defined.
- *16Trailer sway control
Trailer sway control is undergoing validation to confirm functionality and operating conditions for production.
- *17Safety & environmental monitoring
Smoke detection is planned. The inclusion of CO detection, CO₂ monitoring and humidity-sensing bathroom ventilation is being reviewed for the final configuration.
- *18Bedroom privacy partition
Development is underway, with production specifications to be confirmed.
- *19Rear safety rail
Development is underway, with production specifications to be confirmed.
Dimensions, weights, equipment and performance reflect the current development configuration. Validation and configuration work are progressing toward production specifications. Options affect vehicle weight and cargo capacity; final equipment and performance remain subject to confirmation. US customary units are used for dimensions, weights and capacities. Converted measurements are approximate. Battery capacity and power use kWh and kW; engine displacement uses liters. All gallon values are US gallons.
FOUNDERS CIRCLE
Questions, answered.
A little more context on this development update.
Is this the T4 that starts close to $80,000?
This update describes the broader equipment and capabilities currently planned for the T4. It is not the final equipment list for the entry-level model. We’re prioritizing features to make that version lighter and more accessible, targeting a starting price close to $80,000. Final configurations, included equipment and pricing are still being determined.
What does “Planned” mean?
“Planned” means equipment currently intended for the T4. It does not mean the feature has completed validation or that it will be included in every configuration. Numbered notes explain specific development and validation work.
Why is this a development update instead of final specifications?
We committed to sharing final specifications in September, and we’re sorry we haven’t met that commitment. Engineering validation and configuration decisions are still in progress. This update shares the current plan while making those remaining decisions visible.
Will the weights change? Will my SUV be compatible?
We’re optimizing dry weight, GVWR and tongue weight for better compatibility with full-size SUVs. Updated figures will be shared once confirmed. This update does not confirm compatibility with a specific tow vehicle; that will depend on the final T4 configuration and your vehicle’s ratings.
Does 200+ kWh mean a 200+ kWh battery?
No. The T4’s range-extended electric system pairs a 41 kWh LFP battery with an onboard generator. A full tank of approximately 13 gallons of gasoline is expected to generate 160+ kWh of additional electricity over time—bringing the combined battery and fuel-generated electrical energy to 200+ kWh.
With planned output of up to 50 kW, the high-power generator is designed to convert fuel into electricity at a high rate, replenishing electrical energy as needed. The 200+ kWh figure is the combined energy available over time, not the amount stored in the battery at once. Actual generation and replenishment rates will depend on operating conditions and are undergoing validation.
When will final configurations and pricing be announced?
We’re refining configurations and pricing alongside validation and weight optimization. A final announcement date has not yet been confirmed. We’ll share further details with the Founders Circle as they are confirmed.
How will Founders Circle feedback help shape the T4?
Your questions and priorities help the team evaluate features and configuration tradeoffs. We’ll invite feedback on development previews and explain decisions as the work progresses. Suggestions inform the process; they are not a guarantee that a feature will enter production.
From the Founders Circle
Questions selected and answered by the Aboard team.
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