Trickle charger for 24v Stern thruster

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   Right! I found the chargers and yes they are back to front so after checking which one is which(cables are well labeled) I found that there is a 12 volt Current going in to the charger and a 24v current coming out of the charger so I then went to the batteries and again all wiring is well labeled and I found that there is a 24 v current going into the batteries found after removing the charging cable from the batteries and measuring at the cable.So I suppose then I should be looking at the batteries.
I attached a 24 v charger to the batteries and in the space of 8hrs or so went from 24v to 26.2 v at the terminals but on the wurth panel it showed 24.4v to 27.3v
12 hours later the batteries showed the same voltage as before I put the charger on.
How do I tell the condition of the batteries (16months Old) or is there something that I am missing.Thanks to all who have added to this thread.
Duncan

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Gale Force Members Profile Send Private Message Find Members Posts Add to Buddy List Commadore Joined: 26 June 2018 Location: Sri Lanka Status: Offline Points: 398	Post Options Post Reply Quote Gale Force Report Post Thanks(0) Quote Reply Posted: 03 July 2024 at 10:42
	Right! I found the chargers and yes they are back to front so after checking which one is which(cables are well labeled) I found that there is a 12 volt Current going in to the charger and a 24v current coming out of the charger so I then went to the batteries and again all wiring is well labeled and I found that there is a 24 v current going into the batteries found after removing the charging cable from the batteries and measuring at the cable. So I suppose then I should be looking at the batteries. I attached a 24 v charger to the batteries and in the space of 8hrs or so went from 24v to 26.2 v at the terminals but on the wurth panel it showed 24.4v to 27.3v 12 hours later the batteries showed the same voltage as before I put the charger on. How do I tell the condition of the batteries (16months Old) or is there something that I am missing.Thanks to all who have added to this thread. Duncan

Pzucchel Members Profile Send Private Message Find Members Posts Add to Buddy List Rear Admiral Joined: 13 March 2020 Location: floating Status: Offline Points: 659	Post Options Post Reply Quote Pzucchel Report Post Thanks(0) Quote Reply Posted: 03 July 2024 at 11:52
	I use a car battery tester for the purpose. They are not very expensive: I could find for 20 euros one that works for agm, 24/12V, and for the right current range. I use it every year to check that everything is OK...
	Hanse588#55

Lyn Members Profile Send Private Message Find Members Posts Add to Buddy List Captain Joined: 04 February 2022 Location: Hampton, VA Status: Offline Points: 190	Post Options Post Reply Quote Lyn Report Post Thanks(0) Quote Reply Posted: 03 July 2024 at 13:02
	I’ll leave the battery part of your question to someone more versant with battery health checking, but I will also share one aspect I learned about the Magic box for other readers. It can be used as either a 12/24 vdc supply or a 12/24 vdc charger. If you still have the factory installed unit, then it is likely set correctly. However, for future reader of this thread, a new Magic unit arrives configured as a supply. I made this discovery when I decided to check the work of the Mastervolt installer. To change it to a charger, you will need to open the green cover and change the DIP switches to match what is on the Hanse electrical print (this is also indicated in the Mastervolt manual). Sorry, I don’t have access to the prints at the moment, but I seem to recall that the switch positions are indicated at the top of the page where the chargers appear. This enables you to have bulk-absorption-float modes. Again, this is likely not relevant since you may have the factory units which were installed correctly. This is for replacement installations.
	Jon S/V Lyn 2017 Hanse 588 \| Hull 19 \| Deep draft \| 150hp \| 220v & 110v systems \| Lithium House Bank



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