FAQ about cables and connections
Can I trust that my circuit diagram are OK?
We often get the question of whether it is possible to trust that the electric circuit in the boat is OK, and we always answer the same way. No, you can not trust it for several reasons. I.e. if you have an old boat with more then one owner, the system probably have been changed without updating the circuit diagram.
It's often a waste of time trying to analyze your old old system, instead, try to understand how your system should be, and there after replace the old system.
Do it properly and there is no need for redoing it ever again.
Where do I connect a charger when I have a separating relay?
You should connect your charger directly to the consumer batteries. This since the starter battery are rarely in use so they does not require extra charge support.
How do I dimension the cables between the batteries?
If you have multiple batteries in parallel, they only need to have half the area of the cable area needed to and from the batteries. This since the power divides on all of the consumer batteries.
How do I recognize a correctly made cable from Skyllermarks?
All pre-pressed cables from Skyllermarks wears a shrink tube with the company name on.
This will ensure that you get the highest quality. There are copies that do not hold the quality, so keep your eyes open!
How should I connect my bow thruster?
You should connect the bow thruster directly to the consumer batteries with proper cables and a seperate fuse.
Many use an extra battery next to the thruster, due to the distance between the battery bank and the thruster. The downside to it is, that the single battery will be deeper discharged than if the entire battery bank shares the power.
Let the extra battery for the thruster be included in to the battery bank instead. This keeps the batteries better and the thruster becomes stronger.
The reason for this? The charging of the batteries is ten times more sensitive to voltage drop than the drive of the thruster is. When charging, the batteries can accept a voltage drop of 0.1 V, while the thruster can handle a voltage drop of 1.0 V. If we assume that the generator is on 50A and the thruster is on 500A, the required cable area will be the same, regardless of whether you should charge the extra battery or drive the thruster.
