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Where to put a new tru hull and a watt&sea POD?

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nibheis View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote nibheis Quote  Post ReplyReply Direct Link To This Post Posted: 20 July 2018 at 17:45
Hi all,

Since I received a few PM asking for a review, I took some time to wrote one. Here it is:

https://agile4life.blog/2018/07/20/2500-nm-with-the-wattsea-pod/

Happy reading!
nibheis

Edited by nibheis - 20 July 2018 at 17:46
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Wayne's World View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Wayne's World Quote  Post ReplyReply Direct Link To This Post Posted: 09 July 2019 at 18:36
Nibheis,

I have read your post about your POD 600. We fitted a POD 600 recently to our 575 but we don't seem to be getting the output advertised. Our normal battery draw whilst sailing with AP etc etc is about 15 amps. With the POD running with a boat speed of over almost 9kn we were still seeing a negative reading on our battery monitor. To see what the POD was producing I used a tong tester on the output cable from the POD converter and the most I saw was 13 amps at 8.8kn of boat speed.  Based on the POD 600 specs I should have be seeing around 35 amps. I contacted W&S and they suggested I download some software from their website which, once my laptop running the software is connected to the POD converter via a USB/mini USB cable, I will be able to see the data from the converter including Voltage out, amps out, prop RPM and internal temperature of the converter. W&S have suggested I do another seatrial and run the software which also has a "log" function to record the data. It will be interesting what the data shows. If you want to download the software I can PM the details to you. 
Wayne W
Cruising, currently in the Mediterranean but heading across the Atlantic early 2020
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nibheis View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote nibheis Quote  Post ReplyReply Direct Link To This Post Posted: 09 July 2019 at 19:33
Hi there!

I just went through the blog post again. We definitively get more than 20/25 A at such speeds.

My guesses are:

1) You're using a high speed prop. The standard prop is for the 5 to 12 knots range. For a 57 ft boat, maybe they sent you the high speed prop with the POD - that would make sense.

2) The cable between the POD and the charge controller is too damaged (or maybe 1 of the 3 phases is not connected correctly?) or its section is too small? The section size (wire gauge) is not that important on AC current (compared to DC current), so that is unlikely. If you're missing 30% of the current, that could be a phase cable missing (though I doubt the charge controller works with only 2 of the phase cables...)

3) Overheating protection, thermal throtlling or something like that? The software will tell.

4) Cable between the charge controller and the batteries/shunt is too small.
You can use this to check what AWG or mm˛ is needed:
https://www.solar-wind.co.uk/info/dc-cable-sizing-tool
(if your batteries are 1 m away from your charge controller, the cable run is 2m)

5) Location of the POD is not ideal? POD is not getting the complete water flow?

I guess you checked all of that already. Please let us know your findings.

I'd be interested to get the software if it runs on Linux - which I doubt it does. Thanks anyway!

Best regards,
nibheis
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Wayne's World View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Wayne's World Quote  Post ReplyReply Direct Link To This Post Posted: 09 July 2019 at 22:06
Nibheis,

Appears the software is only available for Windows and Mac. 

We are definitely using the 240mm prop. I bought a spare a well and changed props in case the first was slipping. Cabling to the converter was that supplied by W&S. Cabling from the converter to the BUS is good size then from BUS to Victron BMS is large. We are using the POD to charge the house bank which is 4 x 150ah Victron Lithium batteries (new). We also fitted two Victron 120 amp/3000 watt charger/inverters running together. So charging from the Victron chargers and the Volvo alternator is fine. I was thinking of tong testing the three AC phases from the POD to the converter to confirm each is supplying current. Plus run the software and see what it tells me. 
Wayne W
Cruising, currently in the Mediterranean but heading across the Atlantic early 2020
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Matt View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Matt Quote  Post ReplyReply Direct Link To This Post Posted: 09 July 2019 at 22:27
Wayne’s World I had the same issue with my POD it turned out to be the remote 12v on/off relay was faulty and was remaining in the AC shorting position. I was sent a new one free of charge and that solved the problem. The POD was not connecting the batteries and defaulting to thinking we were at full charge and free wheeling. 

Edited by Matt - 09 July 2019 at 22:32
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Wayne's World View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Wayne's World Quote  Post ReplyReply Direct Link To This Post Posted: 09 July 2019 at 23:01
Matt,

Thanks for the tip. I will start looking  at the reply and maybe suggest to W&S France to send us a new one to test. We are currently on the south coast of France so it should be easy to get from them. 
Wayne W
Cruising, currently in the Mediterranean but heading across the Atlantic early 2020
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