Silence at 14 knots. That is the first thing everyone notices.
The GR63 is a 63-foot fully electric offshore power catamaran, designed in France and built in Thailand, with sea trials completed in 2026. It draws its energy from the sun and the wind: 11.5 kW of solar, two 6 kW wind turbines and a 282 kWh battery bank driving two 110 kW ePropulsion motors, with methanol/water fuel cells as backup.
No diesel aboard — no engine noise, no vibration, no fuel bills.
Built for autonomy in energy and in food, it carries four double cabins, an owner’s Nest above the sea, and an automated hydroponic garden. Naval architecture by Fortabat Yacht Design.
Specifications
Length overall: 19,20 m. (63 ft)
Beam overall: 9,20 m.
Draft: 1,55 m.
Light displacement: 31 t. (calculated)
Measured displacement, full load: 38 t
Electric motors : 2 × 110 kW ePropulsion, with AI-powered eSSA energy management
Batteries : 282 kWh Li-ion (24 / 48 / 560 VDC)
Solar panels: 11,5 kW
Carbon Wind turbines: 2 × 6 kW, magnetic levitation, carbon and basalt
Fuel Cells: methanol/water, up to 20 kW
Hydroponic garden: automated, forepeak
Fresh water: 2 X 500 Liters
Methanol: 4 X 450 Liters
Category: Designed to CE Category A — certification in progress
Weights measured, not estimated.
Construction
Sandwich: Divinycel foam, multiaxial basalt fibre, aramid (Kevlar®), carbon, vinylester and epoxy resins
Anti-delamination design, reinforced bows fore and aft, crash boxes Titanium deck hardware: posts, rails and stanchions
Conception
Naval architect: Alexandre FORTABAT Yacht Design
Design & Engineering: Gilles Reigner