Electrification meets an ageing fleet: what becomes of the diesel vessels?

Passenger shipping faces its biggest technical change since the move from steam to diesel, and it faces it with a fleet largely built in the last century. Nobody has yet put a figure on what happens to the existing diesel vessels over the next ten years. The figures that do exist still show where things are heading.

By Navium · Published October 2026 · Every figure is sourced at the end of the article

The fleet: old, and changing hands

At the end of 2024 the German inland shipping association BDB counted 971 day-trip passenger vessels and 51 cabin vessels in Germany.1 No official average age exists for passenger vessels. The German inland fleet as a whole averaged 47 years in 2023, and the Central Commission for the Navigation of the Rhine (CCNR) notes that most ferries and day-trip vessels were built in the twentieth century.2 A passenger vessel lasts 30 to 50 years; its engine is replaced every 15 to 20.3 That is the heart of the matter: the hull outlives two or three propulsion systems. Every engine decision is now a propulsion decision.

At the same time the number of operators is shrinking. The Federal Statistical Office counted 754 German companies with passenger vessels in 2020 and 584 in 2024, a drop of 23 per cent in four years.4 The vessels disappear more slowly than their operators. They change hands.

The regulatory pressure

The 2018 Mannheim Declaration of the Rhine states sets the line: 35 per cent less greenhouse gas and pollutant emissions by 2035, largely emission-free by 2050.5 What binds the individual vessel is narrower. Since 2019/2020 any newly installed engine must meet EU Stage V, and ES-TRIN no longer permits fitting an old replacement engine.6 The existing engine may run on. But the logic of past decades, overhaul the engine and carry on, ends the day it has to be replaced. Then a Stage V diesel competes with an electric or hybrid drive, and the subsidies favour the second.

Add the expiry of long-term ES-TRIN transitional provisions from 2035. In December 2025 the CCNR itself acknowledged that these deadlines contribute to the decline in the number of small vessels, drafted relief for 24 areas, and will not decide before October 2028.7 Until then an owner of a 1970s vessel does not know for certain whether it may still operate in 2035 under its current ship certificate. That uncertainty is already in the price. Nobody sees it, because no prices are published.

Locally it moves faster. Amsterdam has required emission-free commercial passenger vessels on its canals since 2025.8 In Paris the Compagnie des Bateaux-Mouches has committed to convert its twelve vessels by 2033, and the port authority HAROPA wants the whole Seine tourism fleet electrified by 2037.9 Bavaria's state-owned lake operator now runs 20 of its 31 vessels on batteries.10 On Lake Zurich, ZSG is spending CHF 21.5 million to convert three vessels, its largest investment in 135 years.11

What conversion costs

The published cases show a range, not a price. The 1952 Alster boat Eilbek, 80 passengers, cost about EUR 1 million, roughly 600,000 of it federal money.12 The 1929 Lake Lucerne vessel Rütli, 120 passengers: CHF 1.2 million.13 The 1933 Heimat on Lake Greifen: about CHF 700,000.14 At the top end, ZSG pays around CHF 7 million per 300-passenger vessel with a 3,550 kWh battery.11 A new electric vessel for 150 to 250 passengers from Lux-Werft costs EUR 3.9 to 5 million.15 Konstanz wants to convert its 2004 car ferry Tábor for EUR 12 million.16

Subsidies are generous and selective. Germany's June 2026 guideline pays up to 90 per cent for conversion to zero-emission propulsion and up to 95 per cent for newbuilds.17 Half of the February 2026 call, EUR 20 million in total, was reserved for passenger shipping, but tourist passenger vessels rank last in the priority order, behind freight and public-transport ferries.18 The Dutch scheme rejected most passenger-vessel applications in 2025; Switzerland will fund only licensed regional transport from 2027.19 In no country is the excursion operator with a 40-year-old vessel the target group.

And the scepticism is real. Switzerland's URh calls full electrification "not financially viable at present".20 Vorarlberg Lines on Lake Constance does not consider pure-electric vessels ready for scheduled service.21 Hamburg's HADAG wrote off its hydrogen plans in 2025.22 Fuel is only about 15 per cent of a passenger vessel's operating costs; the saving alone does not carry a conversion.23 What that looks like for a specific vessel is shown by our operating cost calculator diesel vs electric.

Three consequences for the second-hand market

Good hulls become more valuable. A conversion needs a sound hull, enough stability margin for the battery weight and a route profile that matches the range. Rütli is 97 years old and runs on batteries. A vessel that meets those conditions is worth more to a buyer with access to subsidies than to its current owner without.

Vessels migrate. What may no longer operate in Amsterdam or on an Alpine lake fits a lake without rules, a coast outside the EU or a navigation zone where grandfathering still runs for decades. The used market is the valve through which the fleet is sorted. The more transparent it is, the fewer vessels end up as a derelict at a berth or at the breaker's yard.

The operator base is changing. Almost a quarter fewer companies in four years, a crew shortage that idled an entire panorama fleet in Düsseldorf in 2026,24 and a low-water year in which the Rhine gauge at Kaub went below zero for the first time.25 Those who leave, sell. Those who grow, buy used, because a newbuild is not a short-term option when Lux-Werft builds three to five passenger vessels a year26 with lead times of around eighteen months.15

What is missing: a public price

All three movements lack the same thing. The only signals are broker asking prices between roughly EUR 70,000 and 1.2 million, with no record of what was paid.27 For cabin vessels the CCNR at least documents that 18 and 14 vessels left service as floating hotels in 2024 and 2025.28 For day-trip vessels there is nothing comparable.

That is where an open marketplace earns its place. Not because it speeds up the fleet's transition, but because it shows what a vessel of a given build year, propulsion and certificate is actually worth today. That is the basis on which owners decide whether to convert, sell or carry on. How the price of a passenger vessel is made up is explained in the guide What does a passenger vessel cost?

Every listing on Navium states the propulsion installed, when the engine was last renewed and how long the ship certificate runs. See current passenger vessels or list your own vessel, with no broker fees.

Frequently asked

May a diesel passenger vessel still operate after 2035?

There is no ban. Existing engines are grandfathered. Pressure comes from three directions: any replacement engine must meet EU Stage V, long-term ES-TRIN transitional provisions expire from 2035 (the CCNR will decide on relief by October 2028), and individual cities such as Amsterdam already require emission-free passenger vessels.

What does it cost to convert a passenger vessel to electric propulsion?

Published projects range from about CHF 700,000 for a vessel with a 99 kWh battery, through roughly EUR 1 million for an 80-passenger vessel, to around CHF 7 million per 300-passenger vessel with 3,550 kWh. A new electric vessel for 150 to 250 passengers costs EUR 3.9 to 5 million.

Are there subsidies for converting a passenger vessel?

Germany's June 2026 guideline for green inland shipping pays up to 90 per cent for conversion to zero-emission propulsion and up to 95 per cent for newbuilds, but tourist passenger vessels rank last in priority. Austria funded 40 to 60 per cent up to EUR 300,000 per vessel until September 2026. Switzerland covers 30 per cent of the extra cost, from 2027 only for licensed regional transport.

What does electrification mean for the value of a used diesel vessel?

No study exists. Three tendencies are visible: vessels with a sound hull and stability margin gain value as conversion candidates, diesel vessels migrate to operating areas without emission rules, and the decline in operators brings more vessels to the second-hand market. Published asking prices for day-trip vessels range from about EUR 70,000 to 1.2 million.

Sources

  1. BDB, Daten & Fakten 2024/2025, p. 3 (source GDWS), October 2025. binnenschiff.de
  2. Forschungsinformationssystem (German transport ministry), structure of the German inland fleet, 13 Feb 2026, forschungsinformationssystem.de; CCNR Market Observation, passenger transport chapter, inland-navigation-market.org
  3. International Lake Constance Conference, feasibility study on climate-neutral shipping, December 2023, bodenseekonferenz.org; ElaadNL in Niederlande Nachrichten, 10 Dec 2020, niederlandenachrichten.de
  4. Destatis, inland shipping companies, 18 Feb 2026. destatis.de
  5. CCNR, Mannheim Declaration, 17 Oct 2018. ccr-zkr.org
  6. Regulation (EU) 2016/1628 (Stage V); EUROMOT, FAQ Inland Waterways Transport, October 2025, on ES-TRIN Art. 9.01(4). euromot.eu
  7. CCNR, press release 11 Dec 2025 and autumn 2025 resolutions (2025-II), pp. 7–8. ccr-zkr.org
  8. City of Amsterdam, Gemeenteblad 2025-61778, 14 Feb 2025. officielebekendmakingen.nl
  9. HAROPA PORT, 10 Mar 2025. haropaport.com
  10. Tageskarte, 2 Sep 2026. tageskarte.io
  11. SRF, 1 Aug 2025, srf.ch; electrive, 7 Aug 2025, electrive.net
  12. electrive, 12 Sep 2024. electrive.net
  13. Shiptec, 23 May 2024. shiptec.ch
  14. Swiss Federal Office of Transport, ESöV newsletter September 2025, bav.admin.ch; enex.me, 9 May 2023, enex.me
  15. Binnenschifffahrt Online, 14 Mar 2024 (Adler Nature), binnenschifffahrt-online.de; Bavarian State Government, 29 Jan 2025, and Das Gelbe Blatt, 4 Sep 2026 (EMS Gmund, EUR 4.2 million, about 18 months from order to christening); salzburg.ORF.at, 12 May 2026 (Lake Zell, EUR 3.9 million), salzburg.orf.at
  16. Wochenblatt Konstanz, 28 Oct 2026. wochenblatt-news.de
  17. German guideline on grants for green inland shipping of 23 Jun 2026, Federal Gazette 16 Jul 2026 B3; German transport ministry, press release 066, 17 Jul 2026. bmv.de
  18. GDWS/ELWIS, third call for applications, 6 Feb 2026. elwis.de
  19. Scheepvaartkrant, 18 Sep 2025, scheepvaartkrant.nl; Swiss Federal Office of Transport, funding of electric drives, 22 Jan 2026, bav.admin.ch
  20. Thurgauer Zeitung, 20 May 2025, and SRF, 16 Mar 2025. srf.ch
  21. vorarlberg.ORF.at, 19 Apr 2026. vorarlberg.orf.at
  22. electrive, 27 Oct 2025 (order for three electric ferries), electrive.net; NDR, 15 Jun 2025 (end of hydrogen plans)
  23. DNV GL for the German transport ministry, Energieberatung Binnenschifffahrt, short study 2015. dnv.de
  24. t-online, 6 Jul 2026 (Weisse Flotte Düsseldorf). t-online.de
  25. Schifffahrt und Technik, 14 Aug 2026, schifffahrtundtechnik.de; ZDF, 28 Sep 2026; KD, low water notice, 12 Oct 2026, k-d.com
  26. Lux-Werft, history. lux-werft.de
  27. Asking prices on broker portals for day-trip vessels in Germany and Switzerland, accessed October 2026 (no transaction prices).
  28. CCNR, press release 7 Nov 2025, and Market Observation 2026, passenger transport chapter. ccr-zkr.org

Note: this guide provides a general overview and does not replace technical, legal or financial advice in individual cases. Funding conditions change; the current guidelines apply.

Continue in the guide:

Operating cost calculator Propulsion & emissions What does a passenger vessel cost? Ship certificate & approval
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