I am not talking about
@copec but we have some other users on this Forum who for some reason cannot grasp the concept of an American Company designing building and debugging the technology in America and then contracting the Chinese to build it for them. Even though this is the Normal operational policy of about 90% of American tech companies.?
Maybe Sol-Arks mistake was letting Deye make units for the Chinese market. Most US companies will not openly allow that but I suspect that it probably enabled Sol-Ark to get a better deal on the factory retooling costs and I suspect that cash was probably an issue for them back then.
As for the Firmware, whatever source code Deye was given a year ago, is it!
If they can muddle through and make some rudimentary changes you will be lucky. If you have ever worked with someone else's source code you will know exactly what I mean. Sol-Ark has been super busy updating the Firmware in the USA and they are constantly adding new features and improving existing features.