Grin Technologies Baserunner Controller for Custom E-Bike Builds

£300.00

Grin Technologies Baserunner Controller. The Baserunner controller offers smooth, customizable performance for your e-bike. Compact and reliable, it supports a wide range of motor systems, making it ideal for both DIY builders and professional conversions. Enjoy precise power management and seamless integration in a durable package.

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NOTE – As awesome as this controller is, it is NOT plug and play. It is an extremely capable and adaptable product, but it’s very technical. Make sure you understand the product fully and read the entire manual (at the bottom of this page) before purchasing. Minimal support can be provided with this item.

The Baserunner is a compact field oriented motor controller (FOC) designed to fit inside the baseplate cavity of popular Hailong and Reention downtube battery packs. It has the same functionality and feature set of our popular Phaserunner motor controller, but in a smaller / flatter profile. This makes it ideal for ebike systems that can benefit from the discreteness of a controller hidden inside the battery mount.

Baserunner Installed in Downtube Battery

Unlike the Phaserunner which works with up to 72V nominal batteries, the Baserunner has a maximum upper voltage 60V which restricts it to 52V nominal batteries or lower, and it has correspondingly lower current limits due to the smaller size. We have two models in production. The baserunner_Z9 model uses standard mosfets with the Z910 motor plug and has a maximum peak phase current of 55A, making it perfect for small 250-500 watt nominal hub motors. The slightly longer L10 model uses performance mosfets and can support 80A peak phase currents, making it an ideal option for medium to high power motors.

Baserunner and Phaserunner Models
  Baserunner_Z9 Baserunner_L10 Phaserunner
Max Voltage 60 V 60 V 90 V
Max Phase Amps 55 A 80 A 96 A
Continuous Phase Amps 30-35A 45-50A 50-55A
Motor Connector Type Z910 L1019 MT60 or L1019
  • Slim Profile fits in popular battery cradles, or fits discretely with other mount options
  • New in V4 Model, all Waterproof plugs for CA3, PAS Sensor, and OEM Cables
  • Ability to decode  Combined Speed / Temperature signals in motor cable
  • Proportional Regen available through throttle signal or stand alone wire
  • Works both Sensored and Sensorless, and even with very high eRPMs
  • Waterproof, 100% potted electronics
  • Fully Programmable parameters (regen voltage, max phase and battery currents etc.)
  • Field Weakening allows you to run motors faster than normal back-emf limit
  • Embedded LED with comprehensive flash codes for troubleshooting
  • Virtual Electronic Freewheeling for removing drag of regen capable hub motors
  • Broad Operating Voltage range from 20V to 60V (14S Li-Ion, 24s LiFe)
  • Automatic Thermal Rollback prevents mosfet damage from controller overheating
Grin Technologies Baserunner Controller

Battery

The controller itself has a short pair of + and – power leads which would be terminated to match the plugs on the battery pack. Depending on your battery these may be flat spade connectors with 4 or 5 contacts, or round bullet terminals for power and small round pins for signals. Reention downtube batteries usually use a flat 4-pin terminal, while quite a number of plug types exist for the Hailong casings. If the baserunner is purchased with a battery pack we will install the mating terminals, while if it is purchased by itself then the user would be expected to solder the wire to the terminal already present in their existing battery cradle.

The controller itself has a short pair of + and – power leads which would be terminated to match the plugs on the battery pack.

Motor

The motor cable is 38 cm long and is terminated with either the Z910 HiGo style 9 pin waterproof plug or the L1019 10 pin plug. These connectors include the 3 phase wires, 5 hall wires, and one or two additional signal wires for temperature and wheel speed signals the CA3. The cable length is sufficient to reach from the downtube battery mount to the rear hub motor on most bicycle frames, but for front hub motors or extra long frames you woud need an extension cables.

6 Pin PAS / Torque

6 Pin PAS / Torque

A 6 Pin HiGo Mini-B or equivalent waterproof plug allows for direct hookup of a PAS or Torque sensor to the motor controller. The pin standard is compatible with the ERider torque sensors, and uses 12V rather than 5V for the power supply. This cable is not used or required when PAS or torque assist is handle via a Cycle Analyst, but it is used whith Superharness kits that have the pedal sensor plugged in directly to the motor controller.  

8 Pin Cycle Analyst (WP8)

8 Pin Cycle Analyst (WP8)

The Baserunner is supplied with the waterproof 8 pin HiGo plug (WP8) for running the device under the control of a V3 Cycle Analyst. If the application requires connection to an older CA-DP plug, a WP8->JST adapter would be needed.

Main9 Cable

Main9 Cable

The V4 and later Baserunners also feature a 9 pin waterproof plug that brings out the cables commonly used in ebike wiring topologies with a main signal harness that splits out at the handlebar into throttle, ebrake, 3rd party display, and light connectors. Note that the signal called out as Ebrake (Blue) in this diagram is also mapped as the throttle input on V5 and V6 controllers. 

Programming

Programming

The back of the Baserunner includes a TRRS jack for connecting the Baserunner controller to a computer or USB-OTG capable smartphone using a USB->TTL serial cable. This is the same cable used with the Cycle Analyst and Satiator charger, so if you already have it then great, there is no need to purchase a 2nd one. When not in use, there is a small rubber plug included to seal this hole.

 

Download the manual for the Baserunner controller