In Order to make use of a 400W panel using a system at first intended with smaller panels, Have a look at how you can reconfigure for what you already have… “They're not insurmountable problems,” reported Michelle Davis, head of global solar for the energy research and consulting company Wood https://bestsolarcompanyinbakersfield.blogspot.com/2023/09/4-tips-to-check-before-hiring-solar.html