@dennissefoo Thank you for this constructive remark
you are probably right, I should try to test this charger under different loads and publish the results here
@aspirin624 communication between different languages ​​is sometimes difficult.
When you wrote "homework " i translate too quickly in "housework"
in french "house" is just a house "home" is your personal house or your place to live and the French word is " maison " for both meanings
"devoir" means also "duty" it's not that simple.