You could try speaking with a supplier like AltE Store directly. They'll help you design a system for your use case and you can get a local installer to handle

You could try speaking with a supplier like AltE Store directly. They'll help you design a system for your use case and you can get a local installer to handle the installation, or DIY. I'm not clear on how the subsidies work with this approach, though, and whether you'd have to go through a local dealer / installer to qualify.