Or you could just skip certification and mount the panels on the ground outside or above a little shock you built and run a gorilla cord from your inverter into the window of your house and run whatever you want it off that cord and never ever tie into the grid. In fact I highly recommend people don't tie into the grid for their first solar installation. If you tied into the grid you have a whole lot more cost and you lose some Independence if the grid goes down and you've got a lot of people monitoring what you're doing. If you just have a large thick extension cord running from your solar panels and an outdoor inverter to go into your window then that can be considered a temporary use which you can do with what you want.