You can get flat cables for solar DC wiring designed to pass through the gap in a closed window: https://es.ecoflow.com/products/super-flat-cable?currency=EUR&v

You can get flat cables for solar DC wiring designed to pass through the gap in a closed window: https://es.ecoflow.com/products/super-flat-cable?currency=EUR&variant=46772169736539 https://es.ecoflow.com/products/super-flat-cable?currency=EU...