Entegra Coach Embark: A $400,000 Electric RV With a Tiny Engine as Backup

Jayco’s Entegra Coach has quietly built something the RV world hasn’t seen before. The Embark, a nearly 30-foot Class-A motorhome, runs on a 140-kWh battery and a 440-hp electric motor — and carries a tiny 1.6-liter four-cylinder purely as an on-board generator.

That combination lets it cover around 110 miles on electricity alone and roughly 450 miles with a full battery and a full tank, meaning the camping trip doesn’t end when the charge does.

Key Specs: 140 kWh battery · 440 hp electric motor · ~110 mi EV range · ~450 mi combined range · 1.6L range-extender generator · ~$400,000 · On sale 2027

Harbinger, the California startup supplying the commercial chassis underneath, calls this the first extended-range electric recreational vehicle. Co-founder John Harris describes it as “a brand new category,” according to coverage of the model’s appearance at The Quail during Monterey Car Week.

One battery, two jobs

Most motorhomes stack up separate systems: a big diesel or gas engine to move, an auxiliary generator to power appliances, another battery for starting, plus inverters and campground hookups. The Embark folds that into one.

When you arrive and park, the same 140-kWh pack that drove you there becomes your house battery — enough, Jayco says, to run air conditioning, TVs and kitchen gear for a week or more. Fire up the small engine in Camp Mode and it recharges the pack without waking the neighbors.

• Boondocking: multiple weeks off-grid without moving or plugging in
• Fuel economy: about 16 mpg on a recent cross-country run, roughly 2–3 times a typical RV
• Regen braking: energy spent climbing is partly recovered on the descent
• Simpler power flow: one button and a blue light instead of shore-power guesswork

Mitch Johnson, who heads Jayco’s electric division, points out the quieter operation also makes the Embark a better neighbor at campsites.

The trade-offs are few. There are no slide-outs — a deliberate call to cut weight, extend range and improve sealing and thermal comfort. Inside, though, the fit and finish leans far more boutique rental than typical motorhome.

Range anxiety, meet the campground

Jayco has been cautious about launching. The concept bowed in January 2025, and since then prototypes have been loaned to staff and to rental partner THL in Los Angeles, with telematics tracking how renters charge, how far they let the battery fall and how long top-ups take.

That feedback is shaping the dash interface, which Entegra sees as central to easing drivers into electric camping. The $400,000 sticker will give some buyers pause, especially since the Embark is smaller than comparable diesel coaches. Harris argues the lower per-mile and maintenance costs make up the difference over time.

Production is slated for 2027.