Yellow tag black wire to negative battery terminal

[Patricko315]

I read a few posts about this wire so I decided to check mine. Mine is connected to a post at the front of the engine compartment, see attached photo. The dvsr light is red and I haven’t had any battery issues in 50 hours of operation. Should I remove from that post and connect to the negative house battery per the instructions?

 

[FSH 210 Sport]

I read a few posts about this wire so I decided to check mine. Mine is connected to a post at the front of the engine compartment, see attached photo. The dvsr light is red and I haven’t had any battery issues in 50 hours of operation. Should I remove from that post and connect to the negative house battery per the instructions?

View attachment 237006

No. It’s attached to the ground bus which both of your batteries are attached to.

The red light on the dvsr comes on (closes) when the voltage on either the start or house battery reaches 13.4 volts, this means that start and house batteries are in parallel. When the voltage drops to 12.7 the red light goes out and the dvsr opens isolating the start and house batteries so that the house loads of significance are on the house battery so that the start battery stays fully charged to start the engines.

On the water when you start the engines, the voltage will come up first on the start batteries because that’s where the alternator wires are connected to make sure it is fully charged. Once the voltage on the start reaches 13.4 the DVSR will close parallel linking to start in house batteries and your house battery will start charging.

Makes sense?

 

[Patricko315]

No. It’s attached to the ground bus which both of your batteries are attached to.

The red light on the dvsr comes on (closes) when the voltage on either the start or house battery reaches 13.4 volts, this means that start and house batteries are in parallel. When the voltage drops to 12.7 the red light goes out and the dvsr opens isolating the start and house batteries so that the house loads of significance are on the house battery so that the start battery stays fully charged to start the engines.

On the water when you start the engines, the voltage will come up first on the start batteries because that’s where the alternator wires are connected to make sure it is fully charged. Once the voltage on the start reaches 13.4 the DVSR will close parallel linking to start in house batteries and your house battery will start charging.

Makes sense?

Yes makes sense thanks for the response. You’re one of the many guys who’s a great resource on this forum. Another battery question, I also read about the batteries charging in parallel and some are making a wire reroute at the dvsr switch. I use my optimate 3 trickle charge that I place in the bilge and connect the extension cord for power while in my driveway. Couldn’t I just remove the black jumper that ties the negative terminal posts together and charge independently rather than parallel? I leave it charging for a few days and the chargers green light never comes on indicating a full charge. If I took the battery out of the boat it would come to full charge over night. I realize with the jumper together I’m trying to charge 2 batteries at once? My boat is a 24 Ar250.

 

[FSH 210 Sport]

So if you go into the site search engine and look up DVSR help that thread will provide you with a lot of information.

I need some more information about your charger. Is it a single bank charger? A two bank charger? Can you please take a picture and post it here in this thread for me to look at?

In the thread that I mentioned above, what a lot of guys do is hook up the red wire on the back of the to the load side of either the start batteries switch battery switch, in this way the DVR is not active, and the batteries will not be in parallel when you’re charging when the battery switches are off. This is desirable. My suggestion would be to have a dedicated onboard charger mounted in the compartment by the batteries. Amps of charge per battery no makes a good charger, so does Minnkota, my personal favorite is the Victron energy IP67.

To answer your question about whether or not the batteries will charge that depend depends a lot on how big the chargers you have and how far down you pulled the house battery. Keep in mind that the DVSR will not keep the battery in parallel once the voltage hits 12.7 or 12.8.

Does that answer your question?

 

[Patricko315]

So if you go into the site search engine and look up DVSR help that thread will provide you with a lot of information.

I need some more information about your charger. Is it a single bank charger? A two bank charger? Can you please take a picture and post it here in this thread for me to look at?

In the thread that I mentioned above, what a lot of guys do is hook up the red wire on the back of the to the load side of either the start batteries switch battery switch, in this way the DVR is not active, and the batteries will not be in parallel when you’re charging when the battery switches are off. This is desirable. My suggestion would be to have a dedicated onboard charger mounted in the compartment by the batteries. Amps of charge per battery no makes a good charger, so does Minnkota, my personal favorite is the Victron energy IP67.

To answer your question about whether or not the batteries will charge that depend depends a lot on how big the chargers you have and how far down you pulled the house battery. Keep in mind that the DVSR will not keep the battery in parallel once the voltage hits 12.7 or 12.8.

Does that answer your question?

What I was thinking was picking up a Noco genius 10 so I wouldn’t have to mess with an extension cord for my current trickle charger. I’ve never had my starting battery low after a day on the water usually the house battery is down a little bit around 12.4 from playing the radio all day while anchored out. Throw the Noco genius 10 on the house battery overnight and should be good. Again couldn’t I just remove the black jumper cable from the negative starting battery terminal so the batteries aren’t connected and charge just the house battery independently? I was thinking of just doing this instead of messing with the dvsr switch.

 

[FSH 210 Sport]

You need a 10x2 smart battery charger. Both batteries need to be charged and conditioned properly. The boats charging system doesn’t put out very much current.

Do the dvsr mod. You want to have the dvsr active to charge both batteries while on the water.
If you need help with this let me know. It’s easy.

Put in the NOCO ac port so plugging them is easy. Plug the chargers in and leave them plugged in until you use the boat again.

 

[Patricko315]

You need a 10x2 smart battery charger. Both batteries need to be charged and conditioned properly. The boats charging system doesn’t put out very much current.

Do the dvsr mod. You want to have the dvsr active to charge both batteries while on the water.
If you need help with this let me know. It’s easy.

Put in the NOCO ac port so plugging them is easy. Plug the chargers in and leave them plugged in until you use the boat again.

I already have the Noco genius 10 ordered. I also want to use it for my snowmobile in the winter. So if I do the dvsr mod, I can charge the batteries separately and just move the Noco to the other battery?

 

[jcb1977]

I already have the Noco genius 10 ordered. I also want to use it for my snowmobile in the winter. So if I do the dvsr mod, I can charge the batteries separately and just move the Noco to the other battery?

I would buy the Noco leads...buy two of them, leave them permanently on the both batteries and you could switch between them if you wanted to. or just buy two Noco's so you can charge both at the same time.

you can disconnect the DVSR ground each time you charge but much simpler to do the DVSR mod. just remove the battery switchcluster from the cluster and change the bolted connections as follows.

 

[FSH 210 Sport]

I already have the Noco genius 10 ordered. I also want to use it for my snowmobile in the winter. So if I do the dvsr mod, I can charge the batteries separately and just move the Noco to the other battery?

Which NOCO genius? A single bank?
If so just use that one for your sled and put a dedicated two bank in the boat

Put one of these on the boat so all you have to do is plug in. And leave it plugged in when you’re not using the boat that way both of your batteries are fully charged and ready to go no fuss no must.

 

[Patricko315]

Which NOCO genius?