The Alltrax SR48600 (NEW) Controller


Yeah, you read that right.  Alltrax is launching a new series of controllers, and guess what, bitches…  I HAVE ONE.

This is the SR series, specifically, the SR48600, which means 48V, 600A.  SIX HUNDRED.


It’s a lot cleaner and 2016-feeleing, with the molded enclosure and snappy color-coded blade connectors.  The center big thing sticking up are the heat sinks, with a cap over the channel and a fan.




Note to self: Mount controller such that the fan is pointing in a blowing-not-forward direction, so it’s not fighting the natural airflow of the bike moving forward.

Here’s a breakdown of the whole line:

Screen shot 2016-05-30 at 10.50.30 AM

…and here’s the generic wiring diagram – basically the same as for the AXE from what I can tell:

Screen shot 2016-05-30 at 10.52.57 AM

I’m using this for the Corbin/MacArthur bike.  It’s running a PMDC motor from god-knows-what and was wired for an on-off switch contactor arrangement at 36V with lead acid batteries.  I figure it’d be a lot more gentle on everything involved with a speed control on it for the summit run, so that’s the deal.

Here’s the test rig:

Screen shot 2016-05-30 at 10.59.17 AM

Here’s a video of just hot-wiring the 40V+ pack to the motor without the controller:

#electricmotorcycle #areyouready #gotbatteries #itsalive

A post shared by @powerinflux on


…and with the controller mickey-mouse wired in to test it:

#alltrax #electricmotorcycle #areyouready #gotbatteries #gotthrottle

A post shared by @powerinflux on


2 responses to “The Alltrax SR48600 (NEW) Controller

  1. Looks like they’ve removed the internal coil diode from the SPM. Any idea of the absolute max voltage of the 72v model? The SPM72400 was 90v. Also, lucky bastard….


Fill in your details below or click an icon to log in: Logo

You are commenting using your account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s