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Battery Problem

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Jean Claude View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Jean Claude Quote  Post ReplyReply Direct Link To This Post Posted: 20 October 2018 at 08:02
Hello, my english is not very good, I am sorry, but I understand that your news batterys dont keep the charge?
I have a 2017 HANSE 415.
My batterys are very quicly discharged.
Exemple: After 8 h of navigation with the engine, a night of mooring without charger and at the morning the tension is 10.6 V.
When the technicians test the batterys there are OK, when he test the installation there no currents falling.
Anybody has the same probleme?
PS: A friend of me buy his HANSE 415 at the same date and he have the same probleme.
SEA SOON
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Axel View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Axel Quote  Post ReplyReply Direct Link To This Post Posted: 20 October 2018 at 08:24
Dear Joe,
I have only one pump in a plastic box. There is a switch inside. It switches the pump, if there is a certain level of water. Yours is probably blocked. But my is not connected to the Wurth panel.

Greetings Axel
Axel
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Fendant View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Fendant Quote  Post ReplyReply Direct Link To This Post Posted: 20 October 2018 at 08:54
Salut Jean-Claude,
 
I assume that you have the AGM batteries. At 10.6 they are dead and it seems that your charger can not revitalize them any more to a sufficient capacity level.
 
I once had this when a "friendly" visitor to our marina unplugged my shore power and the fridge drained the batteries completely. I had to replace both batteries at a cost of approx. 800 .
 
Now I have a small device installed, which switches the fridge off when the voltage level drops below 12 Volts. I have a drain pump for the grey water sump and this is in fact always connected to power apparently  like the pumps on you boat. Do you have a battery controller installed ( Victron, Philippi . ) ? This will tell you any consumption in your absence.
 
 
 
Frank
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Jean Claude View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Jean Claude Quote  Post ReplyReply Direct Link To This Post Posted: 20 October 2018 at 13:08
Hello,
I have not till a battery monitor. I will buy one quicly.
About my batterys, are you sure they are deads?
This is 2 Victron 165 AH AGM Deep discharge 2 years old. I am affraid.....
Would you tell me the name of the device who switch the fridge?
I will buy one too.
You think that Hanse sale the boats with no protection of deep discharging?
SEA SOON
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Axel View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Axel Quote  Post ReplyReply Direct Link To This Post Posted: 20 October 2018 at 13:22
Hello Jean Claude,
the fridge has a switch at 9.6 V. That is very low. Try to charge the batteries with the Megapulse. That can help when the batteries are weak.

Axel
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Fendant Quote  Post ReplyReply Direct Link To This Post Posted: 21 October 2018 at 09:42
Gents, I have posted the state of charge diagram for AGM's in the other battery thread. Even if you dare to discharge them 80% you should not fall below the 11.6 Volt threshold. The Hanse fridge hat a low voltage protection set at 10.6 Volt ( might be ok for standard lead acid batteries ) but not for AGM's.
After a nasty experience I have fitted a adjustable voltage switch, set at 12.0 Volts between the switch panel fridge plug and the fridge.
Bilge and grey water pumps are still directly wired to the house battery. During winterstorage I disconnect the service battery bank by unsecrewing all negative cables.
 


Edited by Fendant - 21 October 2018 at 14:53
Frank
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Fendant Quote  Post ReplyReply Direct Link To This Post Posted: 21 October 2018 at 09:44

Jean Claude,

si tu as encore des questions,  n'hesite pas de m'envoyer une PM en Francais
 
Cordiales Salutations
 
Frank
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Jean Claude View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Jean Claude Quote  Post ReplyReply Direct Link To This Post Posted: 21 October 2018 at 11:18
Merci beaucoup, je vais acheter et essayer.
SEA SOON
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