The boat was originally built by a self-builder in Odessa at 1985. Then she got her name Shark, which bears to this day, after a huge number of improvements. In its current state, it looks like a space shuttle compared to other boats of the same size :)
This boat fell into my hands when its hull was already living out, because nobody cared how much water she got inside from the rains on the shore, how it survived the winter, etc.
Her condition can be described using the photo:
The first 4 years the boat stood on the shore and work was carried out on it with the hull, rigging, mast, cabin, etc. I can say with confidence that at least 80% of the boat has been replaced.
For the past three years, I have been refining the boat and experimenting with electric motors. Initially, the boat had a four-stroke 6 hp Suzuki outboard gasoline engine with which there were enough problems. He was deaf when he wanted to and turned on when it have a good mood. As a result, I sold it and stayed only with the electric engine on board and still have not regretted it)
During these three years, the boat had two electric motors and two batteries. First engine (Golden Motor HPM3000) was weak and I replaced it with a handmade more powerful than the first:
This motor will be on this boat forever - it has a large reserve of power and even in severe operating conditions it does not overheat. This is a permanent magnet motor with magnets glued into the anchor of an asynchronous motor. The motor housing is also from an old asynchronous motor. Magnets from hybrid Toyota Prius car. Motor weight - 15 kg.
The first battery was at 48V and 75Ah, it is also self-made:
Everything with it was good except the small capacity for my needs and the not very reliable BMS. I replaced the BMS with a more reliable one over time, but nothing can be done with the capacity - just change the battery. I did this change.
This battery is enough for me to get on the electric motor from Zaporozhye to Energodar (64 km). This battery is also self-made, the cells inside from LG. I have installed a reliable BMS - there are no problems with it yet.
Kelly KLS6022H Motor Controller - This is a sine controller for synchronous brushless motors. There have been no problems with it since the installation - it just works and that’s it.
On board there is a gasoline generator and solar panels for recharging the battery.
The current installed generator is cheap and also self-made, but it produces not bad - 2.3 kW of power, which is quite enough for a full power on an electric engine (10 km/h) and part of the energy goes into the battery at the same time.
Solar panel 250 W - enough during the summer to charge the battery from zero to full in 5 days.
A couple of videos how the boat goes under the engine:
Two-bladed propeller 12" diameter, pitch 9"-10".
Hybrid propulsion weight described here.