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08-21-2024, 10:47 AM
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#1
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Junior Member
Tiffin Owners Club
Join Date: Dec 2023
Posts: 14
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Victron Smart Shunt
I have two BB lithium 100ah each connected to a Victron Smart Shunt. It all worked great until a few days ago. Now when I plug the coach in it never syncs back to 100%. This is in a 2022 Tiffin Wayfarer 25RW
I'm told that it could be because the solar controller is hooked directly to the battery rather getting connected after the shunt. I don't know how to change that connection.
Thanks for any advice
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08-21-2024, 11:01 AM
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#2
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Senior Member
Join Date: Apr 2024
Posts: 575
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Turn your panels off or wait till night. Disconnect the solar negative from your battery and connect it to the load side of the shunt. This way the shunt reads how much current the solar is putting into the battery. Turn everything back on.
__________________
Tony Ramirez
2019 Berkshire40D 380HP,1100W solar,920AHs LiFePO4
'04 37'Sunvoyager-SOLD, '92 30' Pinnacle-SOLD
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08-21-2024, 11:56 AM
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#3
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Junior Member
Tiffin Owners Club
Join Date: Dec 2023
Posts: 14
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I'll take a look and see if i can figure out where the connection point would be on the load side of the shunt. Is there a way to attach a picture on this forum?
Thanks
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08-21-2024, 12:13 PM
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#4
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Senior Member
Join Date: Apr 2024
Posts: 575
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The Neg of the battery(or batteries) should go to the BATT side of the shunt. ALL other Neg connections go to the LOAD side of the shunt. If you have too many, you might have to install a BUSS bar.
__________________
Tony Ramirez
2019 Berkshire40D 380HP,1100W solar,920AHs LiFePO4
'04 37'Sunvoyager-SOLD, '92 30' Pinnacle-SOLD
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08-21-2024, 12:20 PM
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#5
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Senior Member
Join Date: May 2021
Location: Asheville, NC
Posts: 2,525
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Solar controller negative goes to load negative as ALL negatives. There should be nothing between battery and shunt battery neg side, which is clearly labeled. And if the positive is connected to a positive bus bar, both batteries will be charged equally. The smartshunt actually can go out of sync. In that event, reset by fully discharging batteries, then charge to 109% SOC. Or, you can do a factory reset.
__________________
Jim. Formerly Micro Mini 2108DS and Canyon. And several RVs including Class A and Cs. Now, Tune M1 Truck mounted Pop-up Camper on F150.
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08-21-2024, 12:45 PM
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#6
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Senior Member
Join Date: Nov 2001
Posts: 454
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Quote:
Originally Posted by AppleAnnie
I'll take a look and see if i can figure out where the connection point would be on the load side of the shunt. Is there a way to attach a picture on this forum?
Thanks
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Here is how to hook up the shunt.
__________________
2022 Sun Lite Classic 18RD TT
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08-22-2024, 07:13 AM
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#7
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Junior Member
Tiffin Owners Club
Join Date: Dec 2023
Posts: 14
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Thanks all
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08-22-2024, 07:16 AM
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#8
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Junior Member
Tiffin Owners Club
Join Date: Dec 2023
Posts: 14
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The negative wire is too short to reach the load side of the shunt. Looks like the positive should reach the positive bus bar.
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08-22-2024, 08:12 AM
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#9
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Senior Member
Join Date: Mar 2022
Posts: 538
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Quote:
Originally Posted by AppleAnnie
The negative wire is too short to reach the load side of the shunt. Looks like the positive should reach the positive bus bar.
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The positive connection can be on the battery terminal or the bus. It's the negative that has to be on the other side of the shunt.
__________________
2019 Palomino Solaire 147X
2013 Ford F150
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08-22-2024, 09:02 AM
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#10
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Junior Member
Tiffin Owners Club
Join Date: Dec 2023
Posts: 14
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If there are two batteries connected in parallel, does it matter which battery's negative post you attach the shunt to?
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08-22-2024, 09:16 AM
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#11
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Senior Member
Join Date: Mar 2022
Posts: 538
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Quote:
Originally Posted by AppleAnnie
I there are two batteries connected in parallel, does it matter which battery's negative post you attach the shunt to?
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Either negative post will work.
__________________
2019 Palomino Solaire 147X
2013 Ford F150
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08-22-2024, 10:10 AM
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#12
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Senior Member
Tiffin Owners Club
Join Date: Sep 2022
Posts: 290
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I've got the Wayfarer 25JW and the BMV-712 smart shunt.
Mine had to be manually set initially but seems to work well as long as the correct voltage is set on the shunt for 100% charge. I initially had a problem when I received the coach that it would never recharge per the shunt even though the batteries were at 100% charge. It turned out to be some settings inside.
Every once in a while I have to sync it to 100% when it is fully charged.
Marc
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08-22-2024, 11:45 AM
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#13
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Senior Member
Outdoors RV Owners Club
Join Date: Aug 2019
Location: So. Cal.
Posts: 555
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Quote:
Originally Posted by AppleAnnie
If there are two batteries connected in parallel, does it matter which battery's negative post you attach the shunt to?
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To best draw from your battery bank, you should try to use the far ends of the bank. Your parallel setup will have 2 batteries (bat 1 & bat 2). Your coach positive feed would come from bat 1, while the negative would be from bat 2.
Using the Victron Smartshunt, your cabling should go from the negative post of bat 2 to the "bat" terminal on the Smartshunt. From the "load" terminal on the Smartshunt to a negative bussbar containg chassis and equipment grounds.
The object is to have all loads flow through the Smartshunt so it can monitor and account for appliance loads drawn and charge loads supplied.
Make sure all power sources are off before working on any electrical system.
__________________
GPCPL
2017 ORV Glacier Peak F26 RLS
04 Dodge 3500 CC, DRW, 4.11 gears, 4X4, Cummins 5.9, NV5600 manual trans.
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