VX-1 Conversion from NiMH to new Li-ion batteries SX-CONV

Special tools:

- battery lifting tool / holder - ST1201

- inrush limiter


- new battery pack (including BMS) - see http://shop.vectrixparts.com/category/batteries-battery-pack?horizontal

- Charger - BMS wire harness S02240

  1. Check charger compatibility with Li batteries - refer to SX-BC-CONV
  2. Remove NiMH battery - refer to S-ST-100000
  3. Remove Charger NiMH data harness - refer to SX-000209
  4. Install new Charger - BMS harness S02240 - refer to SX-02240
  5. Install CAN-Bus to MC connector - refer to SX-02240
  6. Install new Li battery:
    1. for LiFePO4 refer to
    2. for Li-ion Nissan Leaf refer to SX-LIMNNL
    3. for Li-ion Amita refer to
  7. Reassemble the bike - S-ST-100000
  8. Upgrade the firmware (charger, MC, ICM) !!Do not upgrade BMS firmware - battery comes with newest firmware!!
    1. for Li-ion (Leaf & Amita) - refer to 36S Li-ion
    2. for Li-Fe (GP and Valence) - refer to 40s LiFe battery
  9. Setup battery capacity via dashboard.
  10. Perform full charging with equalization (first EQ can take longer than usual).

This article was helpful for 28 people. Is this article helpful for you?

can I get some help with a VX-1 battery possibly.  Like one of the other people posted on here I have a VX-1 that the previous owner did not charge for over a year.   He said it ran fine prior to that but not it is not accepting the input from the internal charge.  Any help would be appreciated 

Please write to me more details. 

Type of battery and charger.

year of production etc.


Are you still in business?  Any info on service in USA?  Thanks!

Hi all , I need some help to get my vectrix vx-1 to life . Can not charge and want to figure out is my batteries are good  or need new one

Thank you 

Hi. I think this is wrong post but I can't find one abouth converting vx2 from 2011 with gel batteries to lifepo4. I wold like to know if I can just switch batteries and charger or I need to do more on the scooter to höger it running? 


the links for shop.vertixparts are not working.

do you know why??? It is close maybe? Or is just some days manteniance?

thanks in advance,


Hi, most likely it is permanently closed. It is already unreachable for a while.

I can give a link to a copy of the site. Nice to get the ref number of what you might order. You can join Matteo by mail to order. If available.

We have a reasonable stock of spare parts here in HU. Even so it would be great if you can share that link, should there be a need for some items from Matteo.

Houston, Texas, US - I think... is that right?   I don't know what a "winrar" is, nor "bms" nor "Itio 36S"...   I'm just an owner, rider - not a technician...  Is there a different forum I can access?

I'm hoping service will be available in the US before I need to replace my 2014 battery...  so far it's good - but just 20-25 miles per charge..  still useful for city.   If anyone has information about battery upgrades, adaptation of LEAF, Tesla battery etc - I'd love to know - but in non-acronym, plain language, please.   Thanks

it is possible tu buy one bms for conversion to ltio 36S? 

Hello,  from France.  Yes, BMS is available. From Fran . I try to get his website.

Hello, Fran site. email at the bottom of the page.


Thank you very much :) 

maybe you can help me with another problem too, my vectrix is not showing signs of life is there any way to tell if it's just the battery? maybe by connecting a 120v dc power supply you can see if the electricity works? or is there some other way maybe with the motorcycle charger ... I tried to plug it in but nothing happens any advice is welcome

You can apply 110-150 V DC indeed to the battery terminals indeed to check if the bike powers up. You will need to use an incandescent 40-100 W light bulb inline to prevent excessive inrush current that could damage the Motor Controller.

In the majority of the cases it is the battery. The rest of the Vectrix is quite reliable maybe with the exception of the chargers.

It is with pleasure that I tell you that my vectrix is still alive powered by a power supply and turned on everything, keeping it a bit there the battery is back up enough to start the scooter's charger, bathot appears on the dashboard and unfortunately the battery does not hold the voltage and discharges immediately, now my project is to make a new S36 P10 battery with 5 AH 21700 cells, my charger and an ESD (silver) charger with square connectors is it possible to reuse it? if so how? do i need a bms? If so, which one ?

any advice is greatly appreciated this is my first experience with this scooter, thank you for the previous answers and for those to come

Great. Yes you must* have a BMS for Li-ion cells, check the link Sylvain shared, that is the improved version of the original Vectrix design.

The ESD charger is quite old and far from ideal for Lithium. Even so it is kinda possible to use it with the so called Dugas software and firmware, however there is no guearantee it will work nicely with the above BMS mainly due to firmware compatibility issues. A gold charger (aka Runke v2 or v3) would be much better since those are proven to work with the BMS.

* In a nutshell the BMS controls the charger preventing overcharge and takes care of the balancing session as well.

I don't know where to find the Runke charger, to start it would be better to modify what I have, there is a tread that explains how to do and where to download Dugas software and firmware?

Sure, you can find some details here : https://visforvoltage.org/forum/14235-problem-dougas-engeneering-firmware. If you drop me (me@mecano.hu) an email I can send you the files. Note, you will need a specific CAN bus adapter as well : https://www.peak-system.com/PCAN-USB.199.0.html?&L=1&no_cache=1&sword_list%5B0%5D=ipeh002021 (the opto isolated one).


hello, Fran has a complete offer. BMs, charger ect that seem to be better than the originals. It seems Dugas firmwares causes a lot of charger breakdown. Fran's not. Never heard about problems.

Once you have the the Vectrix Diag app talking to your bike it is strongly recommended to take a note of the original firmware versions in case you need to roll back. The risky part is the Motor Controller firmware change, absolutely no disruption is allowed during the process. Should the image download fail in the middle there is no easy way to fix the MC (only by low level reprogramming the processor). Never broke for me though.

it seems that I have found a Runke, as soon as it arrives I start the work and I will certainly have other questions, if you like the forum I will publish the photos of the works for the moment thanks to all

Great, make sure it is V2.1 or V3 for Li-ion.

the works go on slowly but continue here are the cells ready to be welded i found a runke 2.1 okay the firmware that I find here in the forum for s36? 

Hello, Nice job. 21700?

About firmware, you can find the latest ones, checked by the bests brains about VX1:



Ask someone else if ok for 36.   I'm a simple archivist, not part of best brains!

The V2.1 charger is ok for Li-ion, let me check the proper firmware version (there are 60 and 120 Ah versions out there). Matching MC and BMS firmware versions will be needed as well. You must use a Vectrix BMS with the stock charger. The ICM firmware version is less relevant. 

thank you wich is the right one for my conversion? charger Runke 2.1 battey s36 50 AH 

Sorry for the delay, I will check tomorrow eventually which firmware set is the right one.

For the charger you can use the "EVPS LiMn 36s-2.hex" (< 60 Ah) or the "evpsli02last.hex" (< 120 Ah). For the MC I use the matching "MCR2042-4.hex" but the "MC_FRA20B01.hex" should work as well. On the ICM the generic "DIY_1708.hex" should be fine. The BMS firmware will depend on the hardware you have.

ok thank you very much i have the Fran bms only one question ? i dont see the software i think to install it sunday... can i set it to charge 50 AH not 60? my battery is 50H

Absolutely, you should set it to 50 Ah in order to have the SOC and as a result the range estimation working correctly. Even so you may need to adjust the charge level reading regularly as it tends to shift by time. With the Fran BMS you should be good, check the Fran directory on the Google share by Sylvain. I would strongly recommend to disconnect the charger and the BMS ftom the CAN bus when you change the MC firmware.

Thanks for the advice, better to do. the MC first?

The sequence does not really matter.

Good morning everyone this morning I start the conversion work I feed the scooter with the power supply and it does not turn on anymore help !!! I have not touched the scooter for 3 weeks and after changing the charger it turned on and I also marked the type of firmware today instead 0 I turn the key and nothing turns on what could have happened? what can I do ?

Check the battery voltage, should be at least 100-110 V.

120v and connected to the power supply the 200 amp fuse is good the strange thing I found in my controls is that the 12volt on the j22 connector between pin 2 and pin 3 is only 5 volts

I was wrong to write in the previous post pin 2 and pin 3 0 volt pin 4 and pin 12 (KEYSW + and -) 5 volt 

That is bad new since it must be 12V (output of the MC 150V/12V DC-DC converter).

Do you have about 6V on pin 12 when the bike is turned off ? That is the "ignition" floating voltage which should go to 0 volts when the ignition key is on or the charging has started. Also 12V should show up in this case on pins 3,6,7,9.

is it possible to check the fuses (the old ones soldered to the board) without disassembling the MC?

yes I did they are all ok

"yes I did they are all ok"...The voltages or the fuses ?

the fuse are ok the voltages no 

is there anyone who can fix it?

Does the "ignition" floating voltage on pin 12 falls to 0 volts when the ignition is on or the charging is started ?

I discovered another thing that seems strange to me the positive passes in the frame of the scooter

That is definitely a problem, should be fixed as the first step because this means the MC only has a few volts (maybe 30V if I am not mistaken) as high voltage input. Also these old NiMH batteries won't take you far, I assumed you would use Li-ion ref. your picture two weeks ago.

of course I have lithium batteries to fit that's what I wanted to do today but the scooter didn't turn on

anymore from 3 weeks ago ... i detached al connectors on the board and the positive stll on the frame, the positive from battery to fuse is ok so is the board i think it touch behind some where on the frame do you think is that possible ?

find it the brige, but the MC dont work anymore sure the dc to dc part dont work :(((

anyone can fix the MC? or have a MC board to sell ?

It is pretty hard to damage the MC, as long as it has 100+ volts on the HV input terminals and the ignition pins (4 and 12) on J22 are shorted there is a good chance it will give the 12V DC. Even if you find an MC on eBay they tend to be quite expensive in the range of 300-500 EURs. If it is really broken might be better to fix it.In this case the first step would be to remove it from the bike and test it on a bench with 120V DC.


ood morning everyone I update you on my troubles ... for reasons that I am not explaining the positive on the mc board and went to touch the frame and the scooter does not turn on anymore, I no longer have 12 volts on the j22 connector I replaced the dc dc but nothing has changed, I tried with the tester the current arrives at the input of the dc dc but not at the output (12 volts tested on the bench before mounting it works fine) reading on the forum I found the possibility to turn on the instrument panel by bridging the pins 1- 2 but this too had no effect, I noticed that right next to it there is R1 that seems burned, I have continuity from pin 1 to R1 but absolutely nothing after R1, it seems to me that it is part of the cirquito that gives the ignition to the dcdc but I'm not an electronic so I ask you for advice on what I can do, a big thank you to the whole community