@PhaenTa thanks for your info.
You have earlier said that you feel a difference when you increased the A setting.
Have you tried to lower it? Done any measurements?
My controller doesn't have the 'A' on the label.
The 'A' appears on controllers sold as spare parts.
Or maybe on all newer controllers?
Most dealers have not replied on my questions about the difference.
Some of those who have replied clearly show no technical insight in what they are selling.
Pswpower says the spare controller they sell is the same for both versions.
One dealer has confirmed that the only difference is a software configuration.
Another dealer says that both versions are the same. Just sales mumbo-jumbo for different markets.
He also says that max current limit is 16 A for both, but
my measure of Ap at 15 A confirms with those who give different specs for the two versions.
None of the dealers I have been in touch with are able to update or configure the software.
So far it doesn't seem possible to tell whether you have a 250W or 350W without doing measurements.