How we verify electric boat range

The problem

A range figure on its own tells you nothing about whether it is achievable. A boat can be listed with a headline range that would need more power than its motor can produce. On a specialist electric-boat marketplace, a range you cannot stand behind is a credibility risk, so we check every one.

The physical limit

To hold a given speed for a given distance, a boat runs its motor for the time that trip takes, and can draw, on average, no more than its usable battery can deliver over those hours. That sets a ceiling: the average power a range implies can never exceed the motor's rated power. From a boat's usable battery capacity, its speed, and its claimed range, we compute the implied average draw and compare it to the motor rating.

What we check

A boat's range figures publish only when every hard check passes:

• Required inputs. A usable battery capacity and a motor rating must be on file, plus either a flat range or a multi-point speed and range table.
• Power ceiling. The implied average draw stays at or below the motor rating at every speed, within a small rounding allowance.
• Consistency. Range falls as speed rises, no table point is faster than the boat's top speed, and a headline range agrees with the detailed table where the two overlap.

A separate soft check flags unusually efficient figures for human review without blocking them.

Frequently asked questions

How do you verify an electric boat's range?

We compute the average power a claimed range implies from the boat's usable battery capacity and speed, then check it against the motor's rated power. A range that would need more power than the motor can produce is physically impossible, so it is withheld.

What does the range data verified badge mean?

That the boat's published range passes our physics cross-check and is consistent with its own battery and motor specifications. It is a data-quality signal, not a ranking or an endorsement.

Why do some boats not show a range at all?

Because their range data has not passed the check, most often because the battery, the motor rating, or a reliable manufacturer range figure is still missing. We would rather show no number than one we cannot stand behind.

Does a missing badge mean a manufacturer's claim is false?

No. It only means we have not been able to fully verify that boat's range yet. We never publicly flag a specific manufacturer's figure as wrong. We simply withhold anything we cannot confirm.

Where do the numbers come from?

From manufacturer spec sheets and brochures, recorded per boat and checked against the physics above. When a figure cannot be sourced or reconciled, it stays off the page until it can.