How far can you go? See your electric range on the map

Range is usually the first question sailors ask about electric propulsion. How far can I go on a charge – and will it be enough for the way I sail?

Now you can answer that yourself – for your own boat, from your own home port. Our new range calculator shows how far you can go on electric propulsion alone, drawn directly on the map.

Your boat, your waters

The calculator takes you through three simple steps.

1. Enter your boat

Start with your boat’s length (LOA) in feet and its displacement in kilograms. These two numbers determine how much energy it takes to move your boat through the water.

2. Set your home port

Search for your marina or simply click the map. Choose whether you want to see how far you can go one way, or there and back.

3. Add batteries and pick a speed

Choose how many Searine B48 batteries you want – up to 16 – and set your cruising speed. The map instantly shows your range, together with how long you can motor.

Example: a 36-foot sailboat from Greve

Take a 36-foot sailboat with a displacement of 6.5 tonnes, setting out from Greve Marina just south of Copenhagen – which also happens to be where Searine has its headquarters, so we may be ever so slightly biased. With eight B48 battery modules and a cruising speed of 5 knots, the calculator shows:

• 8 × B48 – a 36.8 kWh battery bank
• 5.0 knots – cruising speed
• 83 nautical miles – 16 h 37 min of motoring

On the map, that covers the whole of the Øresund, north to Halmstad in Sweden and south towards Stralsund on the German coast – on electric propulsion alone.

And that is on the motor alone

The calculator only counts what the batteries can do on their own. Most of the time, the wind and the sails will take you even further. And with Searine M360° you can hydrogenerate under sail: at around 7 knots of boat speed, the system can generate up to 1,500 W and put energy back into the batteries.

The figures are estimates. Actual range depends on hull design, weather, sea state, loading and other conditions. The calculation follows the coastline in Danish and Baltic waters, and does not take depth, currents, wind, bridges or canals into account.

Try it yourself

It takes a minute – and you get a suggested configuration for your boat.

Calculate your range →