The benchmark tender. Italian-built, the Castoldi Jet Tender 21 has established itself as one of the most versatile and reliable tenders on the market. 6.30 metres, semi-rigid, Kevlar and vinylester hull for the ideal compromise between strength and lightness. Up to 12 passengers, waterjet propulsion that makes it indifferent to shallow waters. This is the tender chosen by superyachts that demand performance, safety and reliability all at once.
Original architecture. 250 hp Yanmar diesel engine, waterjet propulsion, top speed 37 knots, generous diesel range. A professional tool built for intensive use.
The Lanéva conversion – two possible routes.
Route 1 – Hybrid generator (up to 86 kVA): a solution developed for a Monaco-based broker and a leading Dutch shipyard. The Castoldi is transformed into an autonomous power generator capable of recharging the high-voltage battery bank of an electric mothership yacht, while keeping its tender performance. A system unique in the world, redefining the tender’s role: no longer a mere appendix, but an onboard energy source for the parent yacht.
Route 2 – 100% electric: full electric propulsion for zero-emission use at anchor and in protected bays. This configuration opens access to zones now restricted to thermal engines (marine parks, regulated anchorages). All solutions include connected supervision and remote maintenance, in line with modern yachting standards.
On board, you will experience… a tender that changes the game. In hybrid generator mode, it is a true energy Swiss-army-knife: 37-knot transfers by day, mothership recharging by night. In 100% electric mode, it is silent access to the most beautiful coves, and the end of regulatory anxiety.
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Test your boat’s eligibility for a retrofit.
Your project, our expertise from start to finish.