35-foot sailboat electric repower
Mid-size cruisers around 6–8 t — the most common repower target on the market.
What this segment looks like
Why a 35 ft sailboat is a sensible repower target
Mid-size cruisers in the 33–37 ft range — Bavaria 34, Beneteau Oceanis 35, Hallberg-Rassy 34 — typically displace 6–8 tonnes and need 15–20 kW continuous to make 5.5–6 kn under power. This is the most common repower target we see.
- 15 kW continuous matches a 19–27 hp diesel one-for-one on most 35-footers.
- 48 V works but cable runs get tight — consider 96 V if your motor supports it.
- 20+ kWh of LiFePO4 typically replaces the diesel + tank weight, keeping CG neutral.
- Dedicated 3.5 kW shore charger gives you a full pack overnight on standard 16 A AC.
Related sizing guides
A realistic breakdown of electric boat repower costs — motor, battery, controller, charger, installation, and what drives the total higher than people expect.
A practical comparison of saildrive and shaft-drive configurations for electric boat repowers — installation complexity, efficiency, maintenance, and which suits your hull.
How to plan passages with an electric boat — realistic range figures, what kills range, depth-of-discharge strategy, and five practical ways to extend range.
Different boat?
Size your 35 ft sailboat now
Wizard pre-filled with realistic defaults for this segment. Free to run; PDF from €29.