Portable charger

Hello,

To all the EX and street legal MX users out there, are you interested in a more portable charger?

From what I've learn in the past few days, to be compatible, the charger needs to be :
1. in CAN1000 protocol (CAN Baud Rate 250KBS) to communicate with the BMS
2. in the voltage range of the Stark battery (Battery Nominal Voltage 360V)

I contacted both EVPT and TC Charger, I gathered some information and here are the results.
I found 2 chargers that would do the job and be a bit better than a second EVPT23 (the original charger that comes with the Varg).
The EVPT is basically rebranded 3rd gen 3.3kw TC charger (HK-J-312-10).
The HK-MF-312-10 charger is a 4th gen 3.3kw TC charger (lighter and more compact).


The RA2P0360 is a 2kw charger and, I think, an older tech/gen charger, as it's not displayed on the TC charger website in the OBC category.
But still, the efficiency is specified to be the same for the 3 chargers (≥93％).




The EVPT23-32010 costs 552.50€ (15% discount, excluding tax) on evshop.eu
TC Charger gave me 2 quotes :
For the HK-MF-312-10 : $390 per unit + $150 (DHL shipping) for 1 unit or $360 for 3 units (excluding tax)
For the RA2P0360 : $190 per unit + $150 (DHL shipping) for 3 to 10 units (excluding tax)

The Stark power cord and charging cable cost 140€ (98,90€ + 39€) and they need to be modified to the proper connectors on the charger side.

The end goal would be to build a case to protect the parts that need it (connectors and maybe a fan).
I found someone who built something like this for the EVPT23-32010 (200€ excluding tax), but I think I could do something in 3D printing that would do the trick and be much cheaper.


Someone already put the EVPT23-32010 in a backpack, but I'm not a fan of not protecting the connectors, and the fan is much more exposed than on the HK-MF-312-10 and RA2P0360.


In comparison, a complete charger with the big and heavy useless case cost 999€ (including tax).

If you want to take a look, you'll find the PDFs attached.

Awesome, I had a look around at this earlier. Thanks for finding so much more info. maybe the lightest option with a way to connect to type 2 EU charger cables would be the best option (similar to that last picture). That would be a good portable way to slow charge the bike when taking longer breaks.
But an even better option would be a cable that could pump straight DC into the bike connected to a CCS type 2 for fast charging, and bypass the charging unit itself.

rs911 said:

RA2P0360

277

165

66

3,5

Click to expand...

I read the height as 99. so maybe its not the smallest charger, its certainly the lightest.

DaveAusNor said:

Awesome, I had a look around at this earlier. Thanks for finding so much more info. maybe the lightest option with a way to connect to type 2 EU charger cables would be the best option (similar to that last picture). That would be a good portable way to slow charge the bike when taking longer breaks.
But an even better option would be a cable that could pump straight DC into the bike connected to a CCS type 2 for fast charging, and bypass the charging unit itself.

Click to expand...

You only need an adapter like this for type 2 connector with an OBC.

For DC-to-DC charging, some reverse engineering is required to "allow communication" between the station and the BMS.

DaveAusNor said:

I read the height as 99. so maybe its not the smallest charger, its certainly the lightest.

Click to expand...

Sh** you're right, I read the value in the wrong way, so yes it's 99mm and not 66mm :/
It's lighter but not very compact then...

They also said they could redesign a 1.8-2kw charger "if the quantity is large".
So probably a more compact one with later tech, but I don't know what the required quantity and price would be.

rs911 said:

View attachment 13711

Click to expand...

I think that's the first time I see someone who managed to do this backpack thing and actually plug it to a charging station.
Kudos to that guy, and to you for finding this and posting it here.

This shows this shouldn't be terribly hard for Stark to have an onboard charger when they release their first proper road bike. Somehow I don't think an onboard charger will be included for the incoming supermoto, the lack of it would be even weirder than for the EX.

Thank you for collecting this useful information! We have a german wa group where somebody also made his org charger portable and mounted it
to the back of the seat in a tex case. It's a working solution but surely a DC/DC connection would be really great.
So as far as I understood it would be neccessary the to mimic the CAN bus connection between the
charger and the bike? I'm pretty new to electric mobility.

Would be great if there was one with a form factor that could fit under the fairings somewhere.

Erwin P said:

Would be great if there was one with a form factor that could fit under the fairings somewhere.

Click to expand...

I don't think it can be built that small with a considerable charging rate.

Well what is considerable? I think 1 or even 0,8 kW could make it a viable commuter for me.

That would also make trips with overnight stay in cabins possible without needing to haul the huge charger around.

Under fairings might be asking a bit too much for DIY solution but anything fitting in a reasonably sized tank bag would be a win.
Like this 11 liters bag (23*25*43 cm) for instance: https://sw-motech.com/en/products/luggage/tank+bags/PRO+tank+bag/4052572201565.htm

Yess and no. For commuting that would be a significant win. However for Enduro riding that would be too exposed for my liking but more imporantly it is taking real estate my butt wants and needs in Enduro.

I'm not interested in a charger that you could put under the fairings, because for me it wouldn't be a portable charger that you could put in your backpack or bike bag.
And like you Erwin, I don't want a bike bag on the rear fender, but I'm pretty sure it would be possible to make something like that for the front fender or just on top of the forged carbon cover like a classic tank bag.



If you really want it behind the fairings, I think the best solution would be behind the front plate with custom brackets to make enough room for the charger.
It would be quite easy to make with a very compact 1-1.8kw charger.