57 Deep Silence
Sialia Yachts · Electric · ultra luxury
From €4,000,000
Request a quoteSialia's original all-electric performance cruiser, launched 2022 — the model that established the shipyard. Twin 400kW motors, CE-B certified, 19-tonne displacement, cruising speed 18 knots. AC charging 22kW, DC fast charging 150kW. Uses a parallel propulsion system: a diesel engine acts as an onboard generator/backup, extending range to a claimed 250nm on a single electric charge and recharging the battery from 20-80% in about an hour — similar in concept to Silent Yachts' range-extender pattern, so still classified as primarily electric rather than hybrid. Predates the newer 59-series and 45 Sport.
Specifications
- Length
- 17.6 m
- Beam
- 4.8 m
- Passenger capacity
- 12
- Motor power
- 800 kW
- Top speed
- 32 knots
Powertrain options
AMPROS
- Motors
- 2x
- Power
- 800 kW
- Top speed
- 32 kn
- Range
- 250 nm
- Price
- €4,000,000
AC charging 22kW, DC fast charging 150kW. Diesel generator/backup extends single-charge range to a claimed 250nm and can recharge the battery 20-80% in about an hour. Battery capacity itself not independently published for this (2022-launched) model.
What a buyer should know
Who it suits
The 57 Deep Silence is the boat that established Sialia, launched in 2022, and it remains the range's most proven product — a point worth weighing against newer models still finding their production footing. At 17.6 metres, 19 tonnes and CE-B certified, with twin 400 kW motors giving an 18-knot cruise and 32-knot maximum, it targets an owner who wants a serious performance cruiser and treats silence as the primary luxury rather than a novelty.
The honest caveat
The 250-nautical-mile range claim depends on a parallel propulsion system in which a diesel engine acts as onboard generator and backup. That is a sensible engineering answer to range anxiety and it is disclosed openly, but a buyer should be clear that this is a hybrid architecture in practice, not a zero-emissions boat once the generator runs. Charging is well specified — 22 kW AC and 150 kW DC — though 150 kW DC is slower than the 45 Sport's 350 kW despite the larger vessel.
At €4 million from, the price is the sharpest question. That is significant money for 17.6 metres, and it buys electric drivetrain engineering rather than volume or accommodation. Compare it against conventional yachts several metres longer before deciding the premium is worth it.
Written from the builder’s published specifications and the wider market, not from testing the boat ourselves. Always confirm figures with the manufacturer before committing.