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Battery monitor |
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Jooce 
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Joined: 08 November 2013 Location: Sweden Status: Offline Points: 36 |
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 Posted: 04 September 2014 at 11:42 |
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I just installed the BMW700 in my H325. I used to have the older BMW600 in my previous boat and was really happy with it. Johan, what you are asking for is provided with the BMW700. It shows both the calculated remaining percentage of the monitored battery bank (when installing the BMW for the first time you are asked to input your total number of Ah's in your bank), but it also shows the net of input/output of Ah:s since last full charge. So if you have used say 40Ah but at the same time your solar panels have put in 10Ah, the BMW700 will show the net drainage of 30% But it is all done by calculation, but you can set some parameters like battery health etc. The primary reason I installed it was that the built in voltmeter in the Calibra panel showed the wrong voltage, normally some 0.2-0.7V lower that the actual voltage measuring direct on the battery. I thought that it may also do some calculations but somehow does not take into account that I have installed a solar panel so the additional Ah was taken out of the equation. |
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KarmaDos- Hanse 385 - 2013
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Jooce
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Joined: 08 November 2013 Location: Sweden Status: Offline Points: 36 |
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Posted: 04 September 2014 at 11:44 |
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My mistake in the last post. My example showing net drainage of 30% shall be 30Ahs....
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KarmaDos- Hanse 385 - 2013
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Johan Hackman
Admiral of the Fleet 
Joined: 24 August 2005 Location: Sweden Status: Offline Points: 4243 |
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Posted: 04 September 2014 at 12:37 |
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Mine is a Batt-Meter and does the same as the BMW 700.
Up until now I have tried to make sure not to exceed 100 Ah as my leisure bank is 200 Ah. After reading the test blog I have come to understand that when the batteries age and their capacity decreases I should try to use less before charging, otherwise I exceed the 50% and will risk ruining the batteries. I find that part of the blog very useful. Johan  Edited by Johan Hackman - 04 September 2014 at 15:39 |
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iemand
Admiral 
Joined: 13 February 2004 Location: Germany Status: Offline Points: 1076 |
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Posted: 04 September 2014 at 15:00 |
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I have Phillippi!
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Hanse 312 MJ 2004 - Hanse 370e MJ 2007
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Jooce
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Joined: 08 November 2013 Location: Sweden Status: Offline Points: 36 |
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Posted: 05 September 2014 at 09:43 |
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iemand,
I am curios of the accuracy of the Philippi panel compared to measing directly on the battery. Do you get the same voltage? |
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KarmaDos- Hanse 385 - 2013
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RainierG
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Joined: 14 July 2014 Status: Offline Points: 25 |
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Posted: 05 September 2014 at 11:24 |
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Battery monitors allways use a wire directly connected to the accu to measure the voltage of the battery.
Those which also measure the in- and outgoing current have a (current)shunt connected in the accu cable close to the battery. A second wire set is connected to this shunt, to measure the voltage drop over this shunt, which can be used to calculate the current through the shunt.
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iemand
Admiral
Joined: 13 February 2004 Location: Germany Status: Offline Points: 1076 |
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Posted: 05 September 2014 at 11:32 |
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I have never compared the voltage values. I trust Phillippi! This unit also has a Shunt for the capacity and two inputs for the tanks. I don't know the model but it is doing exactly what it should do and with the cut out of the original panel it looks to me like factory fitted which is not the case!
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Hanse 312 MJ 2004 - Hanse 370e MJ 2007
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RainierG
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Joined: 14 July 2014 Status: Offline Points: 25 |
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Posted: 05 September 2014 at 13:46 |
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Does this model also has a connection for tank sensors?
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kweetje
Commadore 
Joined: 15 September 2009 Location: Belgium Status: Offline Points: 360 |
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Posted: 05 September 2014 at 16:17 |
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built mine myself :) touch screen small lcd with microcontroller, no shunt, instead hall effect transducer. No cabling to adapt. Works like a charm since 1 year :)
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First 4000 miles, no substantial problems
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Perttu
Captain 
Joined: 13 October 2006 Location: Finland Status: Offline Points: 243 |
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Posted: 05 September 2014 at 22:40 |
On my 355#004 Philippi display is consistent with the measuremant directly from the battery. I also have voltage displayed on my plotter thru Simnet and that is 0.2-0.3 lower always. |
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Check my sailing videos - http://www.youtube.com/user/l11483?feature=results_main
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Jooce wrote: