Battery mistake ?

[Weeb]

I put my car battery charger on the battery in the boat on a 2amp trickle charge but I wasn't thinking about the dvsr. Now the red light on the dvsr is on saying it's charging the other battery with the charger disconnected . The two batteries on the boat are connected by a ground cable. Do you think I damaged the boat charger by not disconnecting the little ground wire. I started the engines and the connext showed 13.4 volts so I think it is alright but I'm not an electrical guru.

 

[Beachbummer]

No clue, but in theory, the batteries are direct current, so multiple charging sources do NOT need to be synchronized, unlike in A/C (Alternating current, as seen at home) where a generator plugged into your house electrical system during a power outage then blows up when the power comes back. (EDIT: If you are crazy enough to backfeed through your home, and forget to shut off the main..Doing this is illegal, but a good example of why you can't just add together A/C current power sources)

Let us know how it goes. I bet you are totally fine.

 

[Weeb]

Thanks for the feed back. It was the first time I saw the red light on with the switches off that's why I started thinking I did so mething I shouldn't have.

 

[Hector]

It’s totally normal with dvsr since you didn’t disconnect the ground or did the mod by cutting the red wire in back of the switches (do a search for dvsr mod).
The red light will turn off (isolate the batteries) when one gets to 12v or less.

 

[robert843]

I agree I think your fine I notice all the time at the end of my day of boating when I turn the batteries off that the light will stay flashing sometimes after I have turned the batteries off no issues so far.

 

[swatski]

I put my car battery charger on the battery in the boat on a 2amp trickle charge but I wasn't thinking about the dvsr. Now the red light on the dvsr is on saying it's charging the other battery with the charger disconnected . The two batteries on the boat are connected by a ground cable. Do you think I damaged the boat charger by not disconnecting the little ground wire. I started the engines and the connext showed 13.4 volts so I think it is alright but I'm not an electrical guru.

@davel501 and @Mainah and others have figured that darned charger thingy out for us here, I'm too lazy to look it up now, and I don't remember the details of how it goes. But there are two potential issues with the charging system: 1. the Connext may or may not display correct voltages for (I think) AUX battery - due to continuity on (I think) SPU, and 2. the DVSR setup - stock- will make any "smart" charger "dumb" as it it prevents it from reading the charge independently for each battery.
Sorry for being vague! It's late and I'm not helping here, LOL, but - there are answers! I think in the short term it is not a big deal - with what you are doing/have done, making the mods will help the longevity of the system with proper (smart) charging individual batteries.
As far as the voltage reads, easy to check if you disconnect one battery at the time. For example, if you disconnect the AUX and still read voltage - you will know it can not be right... That was my case. But they have fixed the problem in some newer boats so you could be okay.

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[Mainah]

As previously mentioned the light stays on unless you have done the DVSR engine on only mod. It sounds like you are fine but I do recommend a dual bank smart charger and islotating the batteries when charging for the long term.

 

[bumpy]

As previously mentioned the light stays on unless you have done the DVSR engine on only mod. It sounds like you are fine but I do recommend a dual bank smart charger and islotating the batteries when charging for the long term.

Probably a dumb question, but turning the DVSR to 'OFF' does isolate the batteries, doesn't it?

 

[Mainah]

In the stock configuration there is no way turn the DVSR off. Installing a switch on the DVSR wire or hooking up to engine on wire is the way to accomplish that.

 

[Coheeba]

Here is a few diagrams that should explain. Its been a while since I messed with it but I don't think you can turn the DVSR off. You can disconnect it.

 

[Coheeba]

Here are the key points in the pdf.

DVSR Operation Explained - Charging: The DVSR is connected

between two battery banks. When the DVSR senses a charging

voltage (13.4VDC or 26.8VDC) on either of the banks, it automatically

activates and joins the two battery banks after a short delay (5

seconds), so they are charged as one battery bank.

Isolation: When the DVSR senses that batteries are not being

charged (voltage drops to 12.8V DC or 25.6V DC) the DVSR

deactivates following a 20 second delay, separating the combined

battery banks into two isolated banks.

 

[swatski]

Here is the thread on that issue - post #30 has my (successful) fix to it.
https://jetboaters.net/threads/installing-3-bank-charger-on-2016-e-series.11830/page-2#post-203516
Disclaimer: Just use marine rated wire, unlike me.

EDIT: Just saw @Coheeba posting. Thank you, that is a great reference!

 

[Mainah]

@Coheeba I am going to have to save that diagram for future discussions. In order to prevent the DVSR from combining the batteries one could disconnect the little black wire to the DVSR, install an inline switch on the little black wire, cut the litte red loop and hook up to the engine on wire, or use the engine on wire to trigger a negative output relay to the DVSR black wire. Lots of way to skin that cat but I like the engine on method. If you have solar paneles only connected to one battery then things change.

 

[Coheeba]

Here is another good post on the subject HERE
Scroll down, I called BEP and got an email from their tech.

 

[Coheeba]

@Coheeba I am going to have to save that diagram for future discussions. In order to prevent the DVSR from combining the batteries one could disconnect the little black wire to the DVSR, install an inline switch on the little black wire, cut the litte red loop and hook up to the engine on wire, or use the engine on wire to trigger a negative output relay to the DVSR black wire. Lots of way to skin that cat but I like the engine on method. If you have solar paneles only connected to one battery then things change.

Computers are great! My Yamaha folder is HUGE

 

[Weeb]

As previously mentioned the light stays on unless you have done the DVSR engine on only mod. It sounds like you are fine but I do recommend a dual bank smart charger and islotating the batteries when charging for the long term.

When you say isolate the batteries do you mean with the red wire cut method or removing the connecting ground cable between the batteries? I have decided to keep the boat on an inside rack at the marina instead of a slip so I won't have access to power. I'm not sure what I'm going to do with the batteries in the winter so I didn't want to make any mods yet. If I bring the boat home I'll put an onboard charger in it and do the red wire mod. For now if I want to use my car battery charger do I just remove the little black wire from the dvsr or disconnect all the cables from the batteries.

 

[Coheeba]

I have the same storage issues, I pull the batteries and keep them on trickle charger at home during the winter. I have chosen not to modify the DVSR or add a charger bank as I have the solar chargers. They seem to keep batteries at full charge as long as I am using the boat.

 

[Mainah]

If not on a charger regularly then I would just disconnect the small black wire when on a charger but don’t forget to hook it back up. I am at a marina with power and have a permanently installed NOCO dual bank charger so I went with the engine on method.

If I were in drystack I would try to turn down/off the stereo and empty any ballast prior to being on my way back in to give the batteries the best charge I could from the engines prior to sitting in dry stack. If you don’t have amps or ballast pumps then even that is not a big deal.

 

[Foobar]

EDIT: Warning - This is apparently incorrect. See below.

I just contacted NOCO support about the DVSR as I was concerned about using the charger with the batteries in parallel. I have a Genius Gen2 dual bank 10amp per bank charger. As long as both leads (+/-) are connected to each battery, there is no issue when the DVSR parallels the batteries during charging. The Genius was designed to handle systems wired in this fashion.

EDIT: Warning - This is apparently incorrect. See below.

 

[swatski]

I just contacted NOCO support about the DVSR as I was concerned about using the charger with the batteries in parallel. I have a Genius Gen2 dual bank 10amp per bank charger. As long as both leads (+/-) are connected to each battery, there is no issue when the DVSR parallels the batteries during charging. The Genius was designed to handle systems wired in this fashion.

View attachment 68233

No.
Please read this:
https://jetboaters.net/threads/installing-3-bank-charger-on-2016-e-series.11830/
and this:
https://jetboaters.net/threads/making-dvsr-active-with-engines-on-only.9798/

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