WFCO 8955-AD jumper

bayernfan

Well I think I nearly ran it dead before I plugged it into house power yesterday.  I'll confirm that I have the correct LED lights displaying.

bayernfan

MuttonChops said:

bayernfan said:
. . .  to confirm, I want to see Blue for LED and Red for bulk charging?

Correct for Li-Ion Battery in bulk changing mode of the two-stage profile.

Would you be kind enough to post the latest wiring schematics/diagrams for Tab 400.  I can't find the thread in which you had shared it before.

MuttonChops

bayernfan said:
. . .  post the latest wiring schematics/diagrams for Tab 400. 

Under Categories (left side of screen)
   Owners Manuals  . . .
      Electrical

Some TAB 400 stuff near bottom of posts

Link:  Resources-Electrical

bayernfan

Thanks.  I'm working on a more traditional wiring diagram for my 2024.  I used your documents to jumpstart it.  I'd like to include the lighting as well, as well as make any corrections when I inspect all the wiring for myself.

Let me know what you think.

https://flic.kr/p/2qgqGUN

ReenieG

@kk1L does it matter which direction the "shunt" resistor is installed? I see the grnd & sw pins you mention.

I'm upgrading my converter and according to WFCO, the 8735-AD- MBA assembly I purchased on Amazon is a "knock off," so I'm on my own. In other words, they won't send me a jumper if I need one and wanted me to buy a complete new unit from them. I'd say in this case saving about $100 on this part is worth trying it since Amazon assures a refund if need be and I have this wonderful group of T@bbers here for assistance.

Binghi

Take a look at the Progressive Dynamics PD4655V. I believe it comes set for lithium, and it will fit in the compartment for the WFCO 8955 converter the same way your aftermarket product does.

rfuss928

My WFCO 8735 AD has performed like a champ since the update and jumper installation.  It charges and maintains two 100 AH LFP batteries with no performance problems or glitches.  It is wired in parallel with two Victron solar controllers and a Victron DC/DC charger with no additional switches or or user involvement required. 
The WFCO 8725 in my 2009 T@B was trouble free for 10+ years. 
If you can handle the shunt installation yourself, it may be an easier and cheaper solution than an added charger.  
IMO - I like that the system and all its components are working as intended.

ReenieG

@rfuss928 do you know if the resistor for the jumper has polarity? In other words, does it matter which direction i would solder it since I'd be creating a shunt vs getting the little connector jumper from WFCO for my upgrade. 
Do you have any pics of your whole upgrade? I'd love to see how you connected everything & where your 2 batteries are located as I'd like to add a second battery too.

rfuss928

ReenieG said:

@rfuss928 do you know if the resistor for the jumper has polarity? In other words, does it matter which direction i would solder it since I'd be creating a shunt vs getting the little connector jumper from WFCO for my upgrade. 
Do you have any pics of your whole upgrade? I'd love to see how you connected everything & where your 2 batteries are located as I'd like to add a second battery too.

Resistors do not have polarity.
The factory update is for the firmware controlling the auto-detect and charging functions.  They will also add the jumper locking LFP mode if requested.
On the WFCO 8735AD the circuit board is not accessible without disassembly.
A description of my LFP batteries install is here:
https://tab-rv.vanillacommunity.com/discussion/18199/ultimate-toys-cs-s-lifepo4-upgrade#latest

ReenieG

WESDUNCAN said:

Thank you so much for sharing this information. I have my resistor and I'm going to try this tonight. I hope it doesn't back fire on me lol, we're camping and I have no plan B if it kills the inverter. 

Where did you get your resistor? Is THIS 1/4 watt the right one? or THIS 1/2 watt one? or... there's also a 1 watt, all 3 with the same color bands. I'd hate to have to buy 100 of each for one resistor, but... 😆