'unlock' ASI BAC 4000? (Surron controller version)

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maarten_almighty   100 mW

100 mW
Posts: 39
Joined: Jan 10 2020 7:41pm

'unlock' ASI BAC 4000? (Surron controller version)

Post by maarten_almighty » Dec 18 2020 1:33pm

I am looking to buy a secondhand ASI BAC 4000 controller but the seller tells me this controller has been set up for a surron battery (60v nominal)('Rated system voltage'=60v).
My battery is 20s li-ion (72v nominal) and I was wondering how to change this setting, if it is possible, how difficult it is, and if anyone knows how to do it.

I've been told by the (secondhand) seller that I need a special app from the manufacturer with 'backdoor access' to be able to change the voltage setting... is this true? If so where can I get this app, is there anyone here who has the file and can share it ?

He is asking 550euro for a new (non-used, but packaging has been opened) controller, is this a good price?

Thank you!

Link: https://www.marktplaats.nl/u/vic-strauss/42411482/

markz   100 GW

100 GW
Posts: 12211
Joined: Jan 09 2014 11:38pm
Location: Alberta Canada

Re: 'unlock' ASI BAC 4000? (Surron controller version)

Post by markz » Dec 18 2020 5:55pm

I can't help ya because I dont follow any controllers that need programming. I am not sure where ASI ranks in terms of programability hardness compared to Sabvoton, Kelly or that other one Sevcon. Nucular I heard is good, dunno about programmability hardness. All I know and remember is that ASI had warnings from Grintech and Luna about how advanced users only need buy.

The most I've done is a Lyen 18fet years ago which was just an easy control interface through USB.

Here are some links to look at in the meantime.

search.php?keywords=asi+programming+motor

search.php?keywords=ASI+BAC+programming

district9prawn   1 kW

1 kW
Posts: 324
Joined: Jul 20 2013 10:46pm
Location: Sydney

Re: 'unlock' ASI BAC 4000? (Surron controller version)

Post by district9prawn » Dec 18 2020 7:12pm

The ASI software is actually called "Bacdoor". It's available for PC and android but the android version requires a valid ASI account and password (which you will probably not get). Also keep in mind that it is possible for a vendor to password lock a controller, in which case you will not be able to change any settings even with the correct software.
Neu 8057 6kW left hand drive hardtail with 18 fet Vesc: viewtopic.php?f=6&t=96754

Tommm   100 kW

100 kW
Posts: 1165
Joined: Apr 03 2018 2:32am

Re: 'unlock' ASI BAC 4000? (Surron controller version)

Post by Tommm » Dec 19 2020 3:33am

maarten_almighty wrote:
Dec 18 2020 1:33pm
I am looking to buy a secondhand ASI BAC 4000 controller but the seller tells me this controller has been set up for a surron battery (60v nominal)('Rated system voltage'=60v).
My battery is 20s li-ion (72v nominal) and I was wondering how to change this setting, if it is possible, how difficult it is, and if anyone knows how to do it.

I've been told by the (secondhand) seller that I need a special app from the manufacturer with 'backdoor access' to be able to change the voltage setting... is this true? If so where can I get this app, is there anyone here who has the file and can share it ?

He is asking 550euro for a new (non-used, but packaging has been opened) controller, is this a good price?

Thank you!

Link: https://www.marktplaats.nl/u/vic-strauss/42411482/
You don't need a password for the PC software. Just a TTL usb cable. Search "TTL asi" in this forum

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