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Victron DC to DC Charger install
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jkidd



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PostPosted: Thu Dec 03, 2020 6:47 pm    Post subject: Reply with quote

Ok I have placed the monolith in a new location and it has a reward if you can find it.
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thataway



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PostPosted: Thu Dec 03, 2020 6:54 pm    Post subject: Reply with quote

How many of your drone did it take to lift it?
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Bob Austin
Thataway
Thataway (Ex Seaweed) 2007 25 C Dory May 2018 to Oct. 2021
Thisaway 2006 22' CDory November 2011 to May 2018
Caracal 18 140 Suzuki 2007 to present
Thataway TomCat 255 150 Suzukis June 2006 thru August 2011
C Pelican; 1992, 22 Cruiser, 2002 thru 2006
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jkidd



Joined: 23 Oct 2006
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PostPosted: Fri Dec 04, 2020 12:40 am    Post subject: Reply with quote

thataway wrote:
How many of your drone did it take to lift it?

One big one.
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Knipet



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PostPosted: Fri Dec 04, 2020 10:36 am    Post subject: Reply with quote

jkidd wrote:
Ok I have placed the monolith in a new location and it has a reward if you can find it.


Atascadero, California?

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hardee



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PostPosted: Sat Dec 05, 2020 1:34 am    Post subject: Reply with quote

jkidd wrote:
thataway wrote:
How many of your drone did it take to lift it?

One big one.


Must a been a BIG drone cause I heard the other end of that thing sticks out on teh opposite side of the globe. Forgot what country, but that is one long, and maybe heavy post.

Harvey
SleepyC Moon


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jkidd



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PostPosted: Sun Dec 06, 2020 9:15 pm    Post subject: Reply with quote

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hardee



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PostPosted: Mon Dec 07, 2020 12:43 am    Post subject: Reply with quote

OK OK I know where it is, In my back beadroom closet. Laughing

Nice.

Harvey
SleepyC Moon

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jkidd



Joined: 23 Oct 2006
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PostPosted: Mon Dec 14, 2020 11:20 am    Post subject: Reply with quote

I got the DC to DC charger install done over the weekend and did some testing with a 15 amp charger hooked to the starting battery. I put the charger in the port lazarette hung from the bottom of the stern cleat. Should work pretty good there. Trying to keep the wires as short as possible. Next I need to find out why my battery monitor stopped working so I can test some more.



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jkidd



Joined: 23 Oct 2006
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PostPosted: Tue Dec 15, 2020 12:28 pm    Post subject: Reply with quote

The battery monitor problem ended up being the positive wire from the shunt to the battery. Everything is happy now. Now I can do some more testing.
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Knipet



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PostPosted: Tue Dec 15, 2020 6:21 pm    Post subject: Reply with quote

Jody,
Looks good!
I'm following your thread closely. I plan to use the same Victron charger.
Other than the cables between your starter battery to the DC to DC charger, is there any wiring or switch between the two batteries? Could you start your outboard engine from the house battery if needed?
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jkidd



Joined: 23 Oct 2006
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PostPosted: Tue Dec 15, 2020 10:20 pm    Post subject: Reply with quote

Knipet wrote:
Jody,
Looks good!
I'm following your thread closely. I plan to use the same Victron charger.
Other than the cables between your starter battery to the DC to DC charger, is there any wiring or switch between the two batteries? Could you start your outboard engine from the house battery if needed?


The start battery has a disconnect switch on it and the house battery has a disconnect switch on it. There is a second switch on the start switch that will disconnect power to the dc to dc charger so it can be disabled if you need to. The input and output positive leads each have. 60 amp fuses in them. The leads are #6 awg. The only test I have done so far is to hook an 18 amp charger to start battery and let both chargers go through a charge cycle. Bulk charge mode lasted maybe 20 minutes before it switch to absorption mode. Nothing got hot at all both batteries went into float mode.

Ordered a new battery monitor one that has temperature on it I will be able to use that to either disable charging if the temp gets to cold or turn on snowmobile hand warmers stuck to the sides of the battery case to warm the battery up for charging. I will just monitor for right now to see if I need to go that far.

If the weather permits this weekend I need to service the motor. Then I will discharge the house battery to 90 percent and use the motor to recharge and monitor temps on the charge coil. So far it doesn’t look like I need to change from the 30 charger to the 18 amp charger. I don’t think it will be in bulk mode long enough to get things hot. I’ll have some better numbers after I get this test done.

I removed the combiner switch because you can’t use the lithium battery to start the motor I have a jump start battery for emergencies.
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jkidd



Joined: 23 Oct 2006
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PostPosted: Fri Dec 18, 2020 10:14 pm    Post subject: Reply with quote

I replaced my Victron battery monitor with a new one that will do temperature and has blue tooth. I want to use the old one with the cranking battery. Suzuki minimum cca is 512 and the shunt is a 500 amp. I can short the terminals of the shunt while starting the motor and hook up the meter and the power after the motor is running. Do you think I’ll blow anything up? This will let me watch both sides of the charger.
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Knipet



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PostPosted: Fri Dec 18, 2020 11:37 pm    Post subject: Reply with quote

If you got the Victron BVM 712 battery monitor, I believe it will also give you the voltage of the starter battery, independent of the house battery. I would think that monitoring just the voltage of the starter battery should be enough since other than starting, it shouldn't have much draw.
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jkidd



Joined: 23 Oct 2006
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PostPosted: Sat Dec 19, 2020 9:26 am    Post subject: Reply with quote

Knipet wrote:
If you got the Victron BVM 712 battery monitor, I believe it will also give you the voltage of the starter battery, independent of the house battery. I would think that monitoring just the voltage of the starter battery should be enough since other than starting, it shouldn't have much draw.



I did get a 712 but I used the connection for temperature for the lithium battery.
I only need to put the shunt in temporary so I can measure the output current of the charge coil against the output current of the dc to dc charger. This is just for information. I would think that the engineers at Suzuki wouldn't publish the charge coil is a 40 amp unless it was and there would be a margin of error also If you gave it 50 amps of things to run it is still going to deliver 40 amps and what ever you trying to run isn't going to run right.

I kind of like taking the mystery out of things so I know exactly what it is doing and not just making a guess. If I take the house battery down to 90 percent and run the motor at idle to charge it back up I should know what the current in and out of the dc to dc charger is doing and if the charge coil is getting hot.
I'm also going to get numbers at 1000 rpm. My thinking right now is if the charger can't get enough current from the motor it might only deliver 20 or 25 amps to the house battery. When I hooked up the 18 amp charger everything worked and both batteries came up to float mode, but I didn't have anything hooked up to tell me what the current was.
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pcg



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PostPosted: Sat Dec 19, 2020 12:21 pm    Post subject: Reply with quote

Great discussion. I'm considering using the Victron charger in a more complex system. Is this diagram conceptually correct?

I want to be able to use four charging sources (outboard alternator, generator, shore power, and solar) to charge both start and house batteries. I'd like to utilize some of them simultaneously. For example, both the outboard alternator and solar panels while underway, or solar panels and generator while anchored on a cloudy day, etc. I know I would need to make provisions for not exceeding current levels at particular points, but I'm just considering the concept at this time and wondering if this will work. Thank you.



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