Summer heat
The campsite has the view. We are developing a system that targets one compatible A/C without shore power.
FOUR DESTINATIONS. ONE BIGGER IDEA OF FREEDOM.
One A/C off-gridCentral design objective
Recharge while towingFor compatible tow vehicles
Generator-free comfortQuiet battery power at camp
Respect the RVNormal 50A hookup is the priority
01 / THE BRAND FILM
This is what freedom
feels like.
One minute of open roads, quiet nights and the simple idea behind Three Little Birds. The story starts with the life you want to live, not the equipment.
THREE LITTLE BIRDS / BRAND FILMConcept imagery · Final product details are still in development
02 / YOUR CAMP. YOUR COMFORT.
Hot outside.
Comfortable inside.
No hookup required.
A premium travel trailer should not lose its everyday comfort just because you choose a beautiful campsite without a power pedestal. That is the problem we are building Three Little Birds to solve.
Generator noise
Escape the running generator, fuel handling and the constant mechanical soundtrack.
Portable clutter
Take back floor space and reduce the inconvenience of temporary power boxes and tangled cords.
Lost charging time
Road time could be charging time, when your tow vehicle and the installed system support it.
03 / A BETTER WAY TO POWER YOUR RV
Drive. Store. Live.
All working together.
Three Little Birds is being developed as one coordinated energy system, so you can spend less time managing power and more time enjoying where you are.
01 / ON THE ROAD
Recharge on the drive.
With a compatible tow vehicle, Tow Bird is planned to put available driving power to work.
TOW BIRD / CHARGE02 / AT CAMP
Store the energy.
Energy Bird holds lithium energy for the loads that matter when hookups are out of reach.
ENERGY BIRD / STORE03 / ENJOY YOUR RV
Use power with confidence.
Power Bird is planned to convert and manage energy for selected onboard 120V loads.
POWER BIRD / POWERThis describes the intended system architecture, not a final performance specification or an approved installation diagram.
04 / REAL RV LIFE
The moments that make
it worth going farther.
No spreadsheets at the campground. No product jargon. Just a better experience when the electrical hookup disappears.
01 / STAY COOL
Comfort on a hot afternoon.
The development goal is off-grid operation of one compatible RV air conditioner plus selected everyday loads.
02 / MAKE MILES COUNT
Charge while you drive.
Use available tow-vehicle power to help replenish the battery on compatible installations.
03 / KEEP THE QUIET
Enjoy a peaceful night.
Battery-powered comfort without running a conventional fuel generator at camp.
04 / CHOOSE THE PLACE
Follow the view, not the outlet.
Keep more camping options open when the best sites don't have electricity.
Lifestyle visuals combine original brand-film scenes with generated concept imagery. They illustrate intended experiences, not verified product demonstrations.
05 / BUILT FOR THE RIGHT RV
Designed around
50A Airstream
travel trailers.
We are starting with the electrical realities of premium 50A travel trailers, not trying to promise a universal solution for every RV.
WHEN PLUGGED INKeep normal shore-power operation.
Our design target is to preserve the RV's existing 120/240V split-phase, dual-leg 50A shore-power functionality.
WHEN OFF-GRIDPower the loads that matter.
Our target is selected 120V loads, including one compatible A/C. Off-grid 240V operation is not part of the initial design goal.
All electrical integration and vehicle compatibility must be validated before launch. Airstream is a third-party trademark; Proline Energy is not affiliated with or endorsed by Airstream.
DESIGNED AROUND LARGE 50A TRAVEL TRAILERS.06 / OUR DESIGN PRINCIPLES
Do no harm.
Make RV life simpler.
New energy technology should fit the RV you already own, respect its wiring and make everyday use feel natural.
Respect shore power.
Preserve normal connected operation; do not reduce the RV's original 50A shore-power capability.
Automatic by design.
Develop coordinated charging and inversion that transitions between available power sources without constant intervention.
No app dependence.
A simple wired display and essential status information are design priorities, not a mandatory phone connection.
Engineering over promises.
Fitment, thermal performance, battery protection and safety validation come before published runtime claims.
07 / THE SYSTEM BEHIND THE EXPERIENCE
Meet the
Three Little Birds.
Three carefully defined components. One integrated direction. The equipment matters because of what it makes possible.
01 / POWER BIRD
Power Bird
Turns stored energy into usable 120V power and manages charging and system operation.
More about Power Bird
Planned inverter/charger and system control center. Designed to coordinate shore charging, compatible RV AC loads and supporting 12V integration. Power output, transfer design and final enclosure are under engineering validation.
02 / ENERGY BIRD
Energy Bird
Stores lithium energy for air-conditioning ambitions and the comforts you want to keep.
More about Energy Bird
Planned 51.2V lithium iron phosphate (LFP) battery platform with a modular system approach. Final capacity, weight, protection architecture, installation configuration and runtime have not been published.
03 / TOW BIRD
Tow Bird
Designed to put available charging power to work while towing between destinations.
More about Tow Bird
Planned DC-DC charging component for compatible tow vehicles. Charging current, alternator compatibility, input protection and vehicle-specific installation requirements will be confirmed after testing.
Product images are industrial design renderings, not photographs of validated production hardware. Final appearance, features, certification status and availability may change.
08 / GOOD QUESTIONS
What RV owners
really want to know.
Straight answers, including what still needs testing.
Will it run my air conditioner?
Running one compatible RV air conditioner off-grid is the central engineering goal. The final system must still be validated against actual starting power, continuous load and temperature conditions before this is offered as a verified capability.
How many hours can I run the A/C?
We are not advertising a guaranteed runtime yet. Runtime depends on battery capacity, A/C efficiency, duty cycle, outside temperature and the RV's other loads. Tested model-specific estimates will come later.
Will I lose my normal 50A shore-power service?
No reduction in normal shore-power operation is a core design target. Our initial architecture is intended to preserve the original 120/240V split-phase dual-leg 50A hookup, while providing selected 120V loads when off-grid. Final vehicle-specific integration requires validation.
Can it recharge while towing?
That is Tow Bird's intended role. Whether it can be used and how much it charges depends on the tow vehicle's alternator, electrical design, available power and the installed charging configuration.
Will I need a smartphone app to operate it?
Our design direction is automatic operation and a simple wired information display. We do not intend to make basic operation depend on an app, Bluetooth or Wi-Fi. The final interface is still being developed.
When can I buy Three Little Birds?
The planned introduction is in 2027. Pricing, installation partners, compatibility, certifications and order availability will be shared when confirmed. We are not taking orders or deposits today.
COMING 2027
The next great campsite
is still out there.
Be here when we share the next chapter of Three Little Birds. We're developing something for RV owners who want to go farther without giving up comfort.
No orders. No deposits. No unverified runtime promises.