Also sold as:
Vestwoords-SK-8LNA-A-240



Source: https://diysolarforum.com/threads/megarevo-rxlna-discussion.36290/post-528875

Flygeek wrote:

I decided to poke around the firmware code and see what I could find (yes, all the typos are in there). Feeling a little weirded out that it's built on somebody's desktop using old compiler versions. The developer's nickname is xuejd and if you search on LinkedIn, you'll find him there - but as a general manager: https://www.linkedin.com/in/jiliang-wu-1707b7b0/

What I am finding is that the hardware is actually really quite good (minerva's experience notwithstanding), if you take apart the Megarevo everything is well designed and using solid technology, including the controller (seems to be a Texas Instruments platform - but at least 5-10 years old).

There are two technology subsystems at play here (the DSP platform and the ARM platform - which you see in the firmware versions). The DSP platform is Texas Instruments TMS320C2000 (or STMicroelectronics clone) (https://www.ti.com/sc/docs/products/dsp/c2000/24feat.htm) and seems to be what is used to monitor power and frequency and all the lower-level functions of the inverter. It also provides the firmware flash updating capability.

The other subsystem is the interface and display controller and seems to be based on the TI Concerto (Cortex-M3 platform) platform and this is using FreeRTOS (https://www.freertos.org/index.html) which has been around a very long time and is very stable.

The actual ARM subsystem code written by Megarevo for controlling the inverter only seems to be two C program files (once you filter out all the FreeRTOS includes). Having been in software for far too long, it feels like the embedded systems folks that built the inverter kinda whipped up the customer interface on a Windows desktop and update it on an as needed basis.

At the end of the day, the shit still needs to work and Megarevo really does need to step up their customer support.

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