MPT-7210A Programmable Solar MPPT Charger - Open Source?

[Tobias Gogolin]

Happy holidays folks!
I found a very interesting charger that has exciting capabilities for my application. It's called MPT-7210A, It can produce up to 90V output and transfer supposedly up to 600W of energy! You can find them for less than $40 and my first impressions testing are OK, however without 'open source support it would certainly become better faster!
This link of the item in my ebay store should work for some photos of it:
http://www.ebay.com/itm/182375070826

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Tobias Gogolin
Tel. D1 (49) 151 6600 7066
Tel. D2 (49) 2672 906 9191
skype: moontogo
 

[Patrik Bachan]

Hi,

interesting device. If you want program such device, you have to gather some info: MCU, schematic and so...

Do you have this piece of HW?

ne 25. 12. 2016 v 2:18 odesílatel Tobias Gogolin <user...@gmail.com> napsal:

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[Tobias Gogolin]

Yes I have been testing it, thats why I gather how interesting it would be to to learn about the other products of manufacturer Ming He too! Here this guy even takes it apart:
https://www.youtube.com/watch?v=mM6JTquNSZU
https://www.youtube.com/watch?v=vzhwR0mAshs
https://www.youtube.com/watch?v=rC4rF62CHKY

There definitely is a programming connector https://youtu.be/mM6JTquNSZU?t=402

Are you suggesting to 'clean room it'? By meassuring the circuit diagram and developing something from scratch? I send my china seller a question if they know anything about open source?

The same Youtube channel also testet some of the others of their Power Meters and such interesting for EV development...

As I said from Aliexpress at times under 30€ delivered! Lots of potential for the hardware you get!

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[diggit]

Yes I have been testing it, thats why I gather how interesting it would be to to learn about the other products of manufacturer Ming He too! Here this guy even takes it apart:
https://www.youtube.com/watch?v=mM6JTquNSZU
https://www.youtube.com/watch?v=vzhwR0mAshs
https://www.youtube.com/watch?v=rC4rF62CHKY

There definitely is a programming connector https://youtu.be/mM6JTquNSZU?t=402

Design is similar to all MCU controlled chargers. DC-DC converter driven by MCU, nothing special.

MCU is STM8s005K6, 8bit MCU from ST, not supported by gcc :( (->not supported by cheali FW)

 

Are you suggesting to 'clean room it'? By meassuring the circuit diagram and developing something from scratch? I send my china seller a question if they know anything about open source?

If you want to write FW, you have to know HW. In this case, HW is not opensource, reverse engineering is necessary.

I am not familiar with stm8 MCUs and in the days of cheap ARM 32bit MCUs (eg STM32), not much interested...

If you are interested, you can write opensource FW for this device. It is definitely doable.