She’s working better than the predictions. In my 14,300lb 38’ classic C&C sailboat the 10.0i is doing everything I was hoping for. It’s efficient, 3.3KW gives 5Knots of power, 10.2KW gives 6.8Knots of max speed. Paired with a 600AH 48V battery bank I can do around 40 nautical miles at 5 knots, if I choose to go slower, I can move at 4knots of speed on 2KW of power.

Plus, it’s working fantastic and looks great!

If you are looking at motors, you might think I undersized the motor to the boat, but this thing has torque. I paired it with a 16” MaxProp Classic two blade adjustable pitch propeller, set to 14degrees (7.4 inches). This is a larger diameter but narrower pitch than the recommended propeller, but it has similar thrust and is working well, but does leave me with some vibration. A 3 blade would be better.

Paired with these Ecoflow 500W bifacial panels, they regularly produce 400+watts and peak at 541!. I an leave the harbour on a 2 mile power, go sailing, watch my batteries charge back to 100%, cook some food in the electric air fryer, power back to the harbour 3 nautical miles and dock. Later in the day the solar has the batteries back up to 100%. All I need is more time on the water.

This week we have been out with one of our customers (Ohlson 8:8 sailboat) to do seatrials and prove our calculations on the electric inboard system 10.i powered by two 48-6800 batteries.

Our customer demanded a minimum range of 30Nm @4,5kn.

LWL: 7,3m

boat weigth: 3600kg

calculated range: 30,6Nm/4,5kn/2,0kW

against wind 3m/s: 26,6Nm/4,5kn/2,3kW

by the wind 3m/s: 40,8Nm/4,5kn/1,5kW

combined: 32,2Nm/4,5kn/1,9kW

*The boat was laying in over winter for at least five month without movement, location near Malmö/Sweden. it has not been high pressure cleaned or fresh painted before trials.

Our test results are not just matching but clearly exceeding the theoretical calculations provided by our tools. We could not ask for more and are happy that we can rely on high quality electric propulsion systems by WaterWorld Electronics to supply a sustainable maritime future!

We converted an Ohlson 8:8 sailboat to electric using a WaterWorld 10kW inboard motor, and the results exceeded expectations. The system was easy to install, exceptionally quiet, and provided excellent performance. Sea trials confirmed we even surpassed the estimated 30 nm range. Maneuverability improved significantly, and maintenance is now minimal. WaterWorld’s high-quality, plug-and-play system made the conversion smooth and hassle-free. Highly recommended!

Since 2023 we have had a 15+5Kw WaterWorld inboard motor in our historic Vechtzomp of 14m long (approx. 6.5ton). This engine is very reliable and easy to operate. We do approximately 250 sailings per year and the silent sailing is truly wonderful. For price reasons, we opted for lead-acid batteries at the time. However, lithium is a much better option and the additional cost is now not too bad.

I have been using the 20KW version in the baltic sea on my 34ft ketch since last year (2024) and it is just awesome! You get the silence of sailing while motoring, making trips on engine power more enjoyable than ever before.

Regeneration also works great: I am getting around 100-150 Watts at 5.5-6knots speed even with the inefficiencies due to the angle of the shaft drive system compared to the water flow!