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Welcome to the Tumanako Wiki

The Tumanako Project is an Open Source development effort to produce Open Source hardware and software to drive and recharge electric vehicles. Tumanako is Māori for hope & togetherness.

All Tumanako source code is licensed under LGPL3. Design documents, schematics or any other artefact that is not source code is licensed under the Creative Commons Attribution-Share Alike 3.0 Unported License.

This Wiki has recently moved! If you previously had an account on the Tumanako wiki, it can be reactivated by following these steps:

  1. Go to the log-in page and click the "Forgot password" link. You can then enter your wiki username followed by "" (e.g.
  2. This will redirect you to a second password reset page, when it shows a "push to send new password email" button (or similar), just enter your wiki username (e.g. joeblogs without the @sourceforge... stuff). Then it will eventually (yes, this new wiki site is a bit slow!!?) send you a password reset email :)


Please join our development mailing list:

Chat on the #tumanako channel on the freenode IRC server.

If you are interested in helping out please send an email to the mailing list to introduce yourself. We are particularly interested in hearing from developers with C, C++ and Java experience. Electrical engineers and embedded developers are also welcome.

Please see for a list of git repositories.


Battery Management System

The Tumanako EVD5 Battery Management system is a modular BMS capable of monitoring and balancing Lithium Ion cells. Each board monitors 5 cells and a central control computer controls the battery charger. Communication between nodes is via an RS485 bus. This BMS specifically measures bypassed current.

For more information please visit the Tumanako EVD5 Battery Management page.


The Tumanako Inverter is based around the STM32. It is power stage agnostic and so far has been tested to support Semikron SKiiP/SKAI modules and Powerex. If you want to get involved in development of the Tumanako Inverter, this link will give you everything you need to get started: Inverter Development - Getting Started

The Inverter project consists of at least the following components:

The most recent source code updates are available here:, Johannes also has additional info related to this latest motor control code available on his website here.


The Dashboard is an Android based application which will run on a mobile phone or tablet hardware platform.


  • Electrical Design
  • Software (PIC10F220 Assembler)


The SolarNetwork is an Open Source software platform compatible with an increasingly large list of common "of the shelf" hardware components (e.g. grid tied inverters and load control switches) for distributed generation, monitoring and various demand side response applications.

  • V2G Extensions
    • User interface (specify charge mode and next vehicle use time)
    • External Grid API (power company software control)
    • Charger interface
  • CAN (Vehicle and BMS interface?)



The Tumanako logo was designed by Michael Stewart.