Comparing SUP Motor Runtime: Keep Battery Capacity and Speed in the Same Row

Runtime figures become useful only when you know what was running and how it was used. A claim measured at a gentle setting cannot be compared directly with another system’s maximum-power figure. Keep the motor, battery and operating point together before deciding whether two numbers describe similar use.

Start with two documented examples

The Vaquita spread in ePropulsion’s 2023 catalog lists a 324 Wh battery and separates its performance table into slow, economical and full-speed rows. Its footnote identifies a Red Paddle 10.6 Ride MSL test board and says actual results vary with external conditions. The specification panel gives 70 minutes at full speed and five hours at half speed. These remain historical manufacturer figures for that documented configuration, not a fresh TRIMIX test.

Bixpy’s current K-1 kit FAQ likewise distinguishes battery and speed: the PP-378 answer gives about 75 minutes at top speed and up to 12 hours at slower cruising speeds. A buyer therefore needs the particular battery and operating setting, not a comparison between the largest number in one advertisement and the smallest in another.

Use a matched comparison worksheet

For each candidate, create separate rows for the performance points the manufacturer actually documents. The following headings keep missing information visible:

• Motor model and generation, battery model, and stated watt-hour capacity.
• Throttle or speed setting and whether the reported speed is measured or simply a control label.
• Test board or craft, load and any stated rider conditions.
• Reported runtime, reported distance and whether each belongs to that same test row.
• Environmental conditions and the publication or revision date of the evidence.

If one supplier has not disclosed a test load or water conditions, mark it unspecified. Do not fill the gap with assumptions about an average paddler. Equally, a battery with a larger energy rating does not by itself establish how far a different board will travel. The complete system and the conditions still need comparison.

Separate the buying question from a route plan

The worksheet helps you decide which information to request; it cannot establish a safe operating range for a planned outing. Ask for evidence relevant to your board and expected use, including what the supplier has actually measured and what it is only estimating. Keep a seller’s projection distinct from an independent test. Do not treat a maximum-duration figure as a guaranteed return distance or a substitute for paddling ability and trip planning.

For the hardware questions that accompany this comparison, see the TRIMIX SUP compatibility checklist. To ask about SUP thruster availability and compatibility, include the exact motor/battery combination and the source of any performance claim you want clarified. No current TRIMIX public SUP-motor listing or TRIMIX on-water test is established by these examples.

Evidence and date notes

This is an evergreen buying guide checked on October 27, 2026, not a new-product announcement. ePropulsion Electric Boating 2023 catalog, Vaquita spread pages 56–57: 2023 catalog edition; exact publication day not stated | Bixpy K-1 Outboard Kit runtime FAQ: undated current page. Manufacturer descriptions are attributed examples; TRIMIX has not independently tested these systems or verified their availability.