Brammo Owners Forum

Hi, you need a usb rs485 converter: I ordered on Ali:

https://www.aliexpress.com/item/32891974971.html?spm=a2g0o.order_list.order_list_main.74.664218023Kb35Z

And you will need a connector, same as batterycable

Hi, below you find a copy of a reply on a post i posted earlier on this forum;

 I had to repair a U1-12XP for my Enertia that had a prior botched repair where one bank of batteries was completely dead.  The balance board had the blinking red, so I took it out and connected it to 4 new LifePO4 18650 cells to test and when I checked the diagnostics, 2 of the cells that had 3.3V came up as 0V in the diagnostic.  So I had a busted balance board (it sounds like you are saying you do too).  To replace the board, I ordered a U27-12XP board to replace it from:

https://www.yousun.org/product/valence-u27-12xp-lifepo4-battery-balance-board

This is the same board as the U1-12XP, but it is the modern one from the green batteries and doesn't fit the battery box well (I mounted mine externally in a fly tackle box).  I think the batteries you got are so small you should have the room needed to mount internally.  Once I programmed the right battery number from the diagnostic program, it worked like a charm, no different from the original balance board.

Anyway, not sure if this helps any, but out of curiosity, what did you use for your bus bars/wires?

did you run a check with the Valence diagnostic software?

pretty sure it is the same battery, comparing the old Valence and new Lithion datasheets. There might be a difference in the onboard BMS hardware/software. Any idea of the price of those batteries?

Hello Sunchaser,
Using RT's will not function properly/at all..
First: The onboard BMS in a RT is not the same as in a XP. I doubt an RT can communicate with the master BMS.
Second:The XP's have a higher dischargerate then the RT's; XP 80A continue/ 120A peak. RT 30A continue/80A peak. in my opinion the XP's are nearly capable in doing their job: When accelerating the motor will pull over 200Amps from your batteries, when cruising you will need more than 80Amps, so the XP's are allready overstressed most of the time, using RT's will result in overheating the batteries and large voltagedrops.

Hello, you all still alive? Its so quiet here. Im looking for a 3D CAD file of an Enertia, anybody? I know the Enertia and Empulse are drawn in Solidworks, so somewhere must be some data..

Thanks for the diagram!

Sometimes my messages are cut off when typing an apostrofe, and sometimes not, let's try, i'm pretty sure it is the cause of cut-offs. ok, seems it's working allright now. When i look at the cut-offs in Iceman's posts: it's cutoff on an apostrofe, don't they?