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505: DC Electrical Questions

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skhunter View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote skhunter Quote  Post ReplyReply Direct Link To This Post Posted: 14 September 2021 at 20:28
Hello, I just came in possession of a 470e with no documentation and no battery power (but they were dead when I got it) I see switches under the port side table for engine,  house,  winch, etc. But I read about a separate battery selector switch that I can not locate ?  Can you tell me where this should be located ?

Thanks Steve
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SVZara View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote SVZara Quote  Post ReplyReply Direct Link To This Post Posted: 17 September 2021 at 04:42
What is the make and model# of the battery combiner on the 505?

Edited by SVZara - 17 September 2021 at 04:43
Marc
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2016 Hanse 505, Hull #129
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Arcadia View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Arcadia Quote  Post ReplyReply Direct Link To This Post Posted: 17 September 2021 at 05:06
I believe it is a Mastervolt 2502.
Leon / ARCADIA
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Post Options Post Options   Thanks (0) Thanks(0)   Quote colinc Quote  Post ReplyReply Direct Link To This Post Posted: 17 September 2021 at 05:09
The 505 has a Victron Cyrix - although it may depend on which charger/inverter is installed.

The advantage of an automatic charge relay is that you donít have to do anything.   The disadvantage is that the battery banks may be getting charged when they donít need charge so reducing life - usually the engine starter battery suffers a little.   It is also sometimes useful to combine the batteries manually if, for example, the engine starter battery needs help.   For that reason some add a manual switch to the setup.


Edited by colinc - 17 September 2021 at 05:11
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Iris View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Iris Quote  Post ReplyReply Direct Link To This Post Posted: 13 October 2021 at 17:56
Hi, I also have a 415 is the battery combiner the black box behind the batteries on the LHS when facing the battery box?I am thinking of connecting the solar charge controller to the battery combiner to keep all batteries topped up over the winter.You seem to know a lot more about this than me, does this seem a sensible solution rather than adding an additional device?Thanks
Tony
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Post Options Post Options   Thanks (0) Thanks(0)   Quote colinc Quote  Post ReplyReply Direct Link To This Post Posted: 13 October 2021 at 18:31
You only need to connect to one battery set - domestic best.   The charge relay will connect all batteries when any one goes over a threshold voltage - the charging voltage.   So any one being charged will charge all of them.  

On the 505 there are also DC-DC convertors to charge the 24V bow and stern thruster batteries.   They too will keep a charge from the domestic batteries and from your solar charger.

All good if your solar charger will keep all those topped up.  Only a problem if it gets covered up or disconnected.   If that is likely then better to disconnect all the batteries.   Best to keep an eye on it during the winter.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Arcadia Quote  Post ReplyReply Direct Link To This Post Posted: 13 October 2021 at 22:31
The only problem I see with that set up is the possible cycling of the combiner.  If the solar array canít keep up with the domestic loads as they are switched on and off during operation, then the combiner will repeatedly connect and disconnect as the battery voltage goes from a high voltage (above 13) to a low voltage (below 12.8).  This may damage the combiner. 
Leon / ARCADIA
2018 Hanse 588
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colinc View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote colinc Quote  Post ReplyReply Direct Link To This Post Posted: 14 October 2021 at 05:25
Cycling hasnít been a problem for me.  If you are concerned about that you will have to disconnect the charge relay when using the panels.   You will need another way to charge the other battery banks.   But I donít think it is a problem.

How much current does your panel provide?   Is it just to keep topped up over winter or for keeping batteries supplied when the boat is in use?   If the later then the current supplied from the panels will usually cope with most domestic loads.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Iris Quote  Post ReplyReply Direct Link To This Post Posted: 14 October 2021 at 08:22
Hi thanks for the replies,you are obviously more knowledgeable. The system I have is 2 x 110w Sunpower demountable panels on the Bimini currently wired through a Victron 100/50 and fused to the house bank direct. I didnít have time to fit the permanent 50w on the garage hatch which I plan to do at the first opportunity,this will go to same charge controller.So when Iím using the boat Iíll have 270w potential and when Iím not on it Iíll have 50w to top up the batteries. My question (which I think youíve answered) is do I need to connect the solar charger output to the VSR/combiner or will my current arrangement direct to the house batteries take care of ALL batteries over the winter THROUGH the VSR/Combiner? Thanks Tony
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colinc View Drop Down
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Post Options Post Options   Thanks (1) Thanks(1)   Quote colinc Quote  Post ReplyReply Direct Link To This Post Posted: 14 October 2021 at 16:04
yes what you have now will charge all the batteries.  And will be plenty for winter top up.  Maybe worth checking on her a few times during the winter in case a seagull leaves a present on the panel or something.
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