We just installed an aperemeter that gives us a direct reading of the current coming out of the DC/DC into the battery and rest of the system.

Because that line is at about 50V (actually 56-60V), it makes pretty easy to tell the PV power that is being generated at each moment.

With a nice March sun, we generated at midday about 1.8 kW in the best conditions.

We also observed that the DC-DC stopped delivering current once the battery voltage reached 58V. However, after running the motor for a short while, we spotted the DC/DC unit delivering again some power, even with voltage above 58V. This should not happen, following the manual of it, but it is as it is. Currently we disconnect the charging if nobody is on board to supervise it and if it goes above 58V.

We did quite a few runs with different weather and sea conditions.

We found that at 4 kn, about 1000W of motor power, the boat was quite stable in direction and navigated the waves nicely.

At 2000W we reached up to 5.9kn, if we situated people on the boat to keep a steady weight distribution. If everybody was sitting on the backboard, the boat would just do 5.5 kn and would be more unstable.

With short and high waves taken from the front, we sank into the waves, due to the very thin hulls. Because of the shape of the hulls and deck, this should be no problem, except for the guys sitting on the front getting wet. However, it opens up the question of the suitability of a different hull design (outside of the water) to avoid this.

We discussed the addition of steering elements and we came with a suitable proposal that will bring autopilot to our boat.

We tested “man over board” and anchoring, to our full satisfaction. The very short turning radius brings back the man over board before he gets fully wet (kind of).

Additionally, we adjusted some mirror issues with the steering wheel.

The most rewarding part was to see that the boat is immensely enjoyable while anchored. It is easy to climb up the panels, and lovely to take a nap in the sun.