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BARGES: All about barges and barging - building, buying, maintaining, equipment, handling on the water, etc.
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TOPIC: Batteries and Mastervolt charger

Batteries and Mastervolt charger 23 May 2020 11:31 #116164

I bought 12 2v cells and 2 12v start batteries from www.ecobat.tech and transported to Douai.
Also used Megabattery to deliver to Brussels - but the delivery system didn't get the delivery instructions to a jetty so claimed "address not found"!!.
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Colin Stone
Barge Register KEI
www.luxe-motor-kei.co.uk
DBA - The Barge Association
DBA - De Binnenvaartvereniging
DBA - L’Association des Péniches de Plaisance

Batteries and Mastervolt charger 23 May 2020 10:52 #116162

  • Wendy & Dave Rowley
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I required four house batteries and ordered through Battery Megastore (Tewkesbury) who arranged transport to Bruges via depot in France. They were easy and helpful to deal with and the batteries arrived quick time and good price!
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Batteries and Mastervolt charger 22 May 2020 21:56 #116153

> All I have to figure out now is how to get the batteries to France.

I know the feeling. Last batteries bought for the boat were 6 x 110 Ah leisure batteries. I took them out in the boot of my Fiat Panda. The weight of 2 extra passengers but we made it and struggled to get them on board. All went well. Or you could try to find a supplier who will deliver to wherever your boat is moored. Battery Megastore is often quoted as worth trying. I bought mine from an Ebay vendor.
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Batteries and Mastervolt charger 22 May 2020 21:47 #116152

  • Ray Zdanowicz
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Many thanks to Balliol and Peter for the information.

All I have to figure out now is how to get the batteries to France.

Ray

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Batteries and Mastervolt charger 22 May 2020 16:55 #116137

I think I'm right in saying that Mastervolt chargers can be adjusted to suit the best charging characteristics for various types of battery. If you replace your domestic batteries like type with like type (AGM for AGM), you should have no problem, even with different brands or different total Ah capacity within reason. If you choose to change from AGM to some other type, I would expect there will be dip switches or some other way to adjust charging characteristics of the Mastervolt charger to suit. The manual will tell you.

Peter
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Batteries and Mastervolt charger 22 May 2020 13:48 #116131

  • Balliol Fowden
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In the practical world I do not think that you will have any problem replacing your domestic batteries with similar new ones.

As I understand it:

1. Your Mass charger is principally charging the domestic batteries, with a separate trickle charge facility for the starter / BP batteries, presumably separately sensed and controlled, so you are in effect charging two completely separate battery packs, so no interaction between banks.

2. Your engine alternator is most likely machine sensed and charging through a split charge relay or blocking diode, both of which will simply be paralleling up your two battery banks. That is never a perfectly ideal situation because the overall charge supplied will be controlled by the alternator regulator and it will take the lowest common battery denominator in terms of type / condition / resistance. However, most boats are wired this way, often having for example a standard automotive flooded lead acid battery for starting and a much bigger capacity bank of say deep cycle / leisure / AGM batteries for domestic purposes. In practice this works fine, although some with a more pedantic outlook may argue differently. Almost certainly if you keep to similar battery types with similar charging characteristics then any loss of charging efficiency will only relate to the condition of any one cell in the banks, as always with any parallel (or series) battery situation, or any one dodgy terminal................ etc..

Balliol.
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Batteries and Mastervolt charger 21 May 2020 16:22 #116127

  • Ray Zdanowicz
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Hi All,
Can somebody help with the some thoughts on the following.
I have a dutch steel cruiser with five Mastervolt agm batteries all 12 volt rated at 225amp at c20. Three are for domestic supply and two that are used for engine starting at 12v and bow thrusters (2*12 = 24v) when in operation.
These are all charged with a Mastervolt charger Mass12/80.
This I believe supplies a main charge to the domestic batteries with bulk/absorbtion/float at the appropriate voltages and has a second outlet rated at 3a to the two engine/thruster batteries.
The domestic batteries are showing signs of failing do you think it would be Ok to replace just the 3 domestic supply side with non mastervolt 12/225ah agm batteries that have a similar charge profile.

Also, as I am not in possession of any wiring diagrams for the boat I am not sure how the alternator and charge regulator deals with the two banks
Any information will be appreciated, I have looked through the previous posts but cant find anything that seems to answer the question.

Ray

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