“How many miles can this boat go?”

This question, which seems quite logical at first glance, may not have a single correct answer.

Because the range of an electric boat is not a fixed physical feature.

The speed at which the boat is used, how much load it has on it, sea conditions, wind, battery status and even the acceleration-deceleration cycles performed during operation affect consumption.

For this reason, especially in commercial marine vehicles, it is necessary to evaluate the mission profile rather than a nominal range figure.

Effect of speed on energy consumption

As sea speed increases, hydrodynamic resistance also changes.

Therefore, even a relatively small increase in service speed can cause a much larger change in power requirement.

Just because a boat offers a long range at economical cruising speed does not mean it will provide the same range at maximum speed.

Therefore, in Navarc's project-based engineering approach, the desired service speed is first determined.

If the boat is not expected to operate at top speed at all times, the power system is optimized for actual operating points.

Passenger and load factor

The number of passengers on commercial boats is not fixed.

A boat operating at full capacity in the morning rush hour may operate with a much lower load at other times of the day.

Changing the total displacement can affect the behavior of the hull in the water and its energy consumption.

Therefore, test values obtained only in the empty or ideal load condition may not fully represent the actual operation.

Weather and sea conditions

Wind and wave conditions are important for the energy consumption of electric boats.

Headwinds or waves may require the boat to use higher power to move forward.

The same route may generate different energy consumption on a calm day and in more challenging weather conditions.

Therefore, it is not enough to consider only the best condition in commercial operations.

Three-scenario approach

Navarc emphasizes the use of different scenarios based on the mission profile rather than a single theoretical figure in range evaluations.

best case scenarioIt shows the efficiency that the system can achieve under suitable weather conditions, correct service speed and optimized load distribution.

nominal scenariorepresents the expected daily use conditions of the boat.

Zorlu senaryo It takes into account the impact of factors such as higher load, more adverse weather and higher energy demand.

This approach is especially valuable for commercial enterprises.

Because fleet managers want to know whether the vehicle can complete daily operation without interruption, rather than the theoretical maximum range.

Why does route analysis come first?

For this reason, the process in Navarc's commercial projects usually does not start with boat selection.

First, the route is examined.

What is the route length?

How many trips will be made per day?

How many passengers will the boat carry?

What is the desired service speed?

Is there charging infrastructure at the ports?

How many hours will the vehicle operate per year?

This information constitutes the basic input in determining the energy architecture.

Technical decisions such as battery capacity, engine power and solar energy integration are then made.

So the real question of performance in electric boats is:

“How big is its battery?”

It is not.

More correct question:

“How efficiently and reliably can this energy system perform its designated task?”

should be.