Q & A
Frequently asked questions
Is it possible to install a GreenStar system on my own?
Most of our customers have done the installation by themselves. The system is very well thought through and flexible in its design which makes it easy to fit perfectly in almost any boat. If you decide to do the installation by yourself, don’t forget to send the installation protocol to us which will give you three years system warranty.
Does a GreenStar system require any maintenance?
Everything needs maintenance. In this case though, far less than a conventional diesel or gas engine. At the beginning of each season, we recommend making sure that all cables and bolts are securely fastened, and that the sacrificial node is okay. Batteries should be charged before winter storage, and they can generally be left in the boat during Winter. The system has no drive belts, oil, or grease and therefore no such maintenance is required.
Is the GreenStar system noiseless during use?
Compared to conventional gas and diesel engines, all of our systems are very quiet. The P-line motors are however even less noisy than the EB- and EC-line motors. At economy speed it is nearly noiseless but at full speed some noise and vibrations caused by the propeller may be noticed
Is it possible to reuse the old propeller, shaft etc?
It is possible, although most customers choose not to, since our system warranty does not cover such installations. Another reason to replace all the components is that our system components are designed to reduce friction, noise and maintenance, and are also sold as a very affordable package.
Is it possible to install a GreenStar system in a motor boat?
Of course it is. We have completed numerous power boat installations and deliver our systems to both boat builders and service partners.
How much can you charge while sailing?
The amount of power that can be regenerated depends on the shape of the hull and how freely the propeller can work. Usually 10 minutes of motor drive can be regenerated in 45 minutes at a speed of 5 knots sailing. When sailing faster, more power will be generated, and vice versa.
How many batteries do I need?
This very much depends on the desired range. Usually our customers choose a battery bank size between 5 and 10 kWh. When using lithium batteries the typical weight for this system is 35-70 kg och is roughly the size of 2-4 traditional 75 Ah car batteries. Building the same battery bank with lead batteries will be considerably heavier and take up more space.
Is there a battery monitor included in the system?
Yes, a battery monitor is included in all systems. EB-line comes with a simpler monitor which shows “% charge remaining”, time-to-go, voltage and current. EC- and P-line comes with a more advanced display which can show additional datapoints and allows for further graphical customization.
Is it possible to connect a genset to the GreenStar system?
Yes it’s possible, and two different methods can be used. The first is to have a permanently mounted DC genset, that directly charges the batteries. This method is more costly but it is a very nice and sophisticated solution.
The second method is to use a portable genset, for example a Honda eu10i. This method should be considered to be a range extender, and can be used if the wind fades or the batteries are drained.
Please contact us if you want assistance in designing a hybrid system for your specific needs.
Why doesn’t the propeller fold while propeller charging
When you start regenerating power, the motor will first start spinning the propeller. Once spinning the water flow will wan’t to keep it spinning. The propeller will fold if the load on it gets too big. This is taken care of by the charge control system so it is something you as a user don’t have to think about. You do however have a chance to tune the load and by that also control the drag while sailing and charging.
What is STAR?
STAR connects your powertrain to our cloud platform and is available for both EC- and P-line. Through STAR you can check the current status of your system. This includes data such as GPS-position, system notifications, battery status, whether the system is currently charging or consuming energy, and more. Your own pin-code is used to start the system, making theft more difficult.
Additionally, STAR enables GreenStar support to offer fast and efficient assistance if you encounter a problem with your boat or if you want help customizing your system.
How much does STAR cost?
STAR is included free of charge for two years. After this period you’re able to choose which services you’d like to be subscribed to.