I recently had a 9.81 KW solar panel system installed at my house in Colorado. In order to qualify for a rebate from my electricity provider (Xcel Energy), the DC electricity generated by the solar panels must be converted to AC by an inverter and enters the 'grid' immediately upstream of a new bidirectional meter (actually two of them). So I am still connected to the grid, but when the panels are generating at least as much electicity as I'm using, the juice should be a bit cleaner, but I have no way to confirm this. At any rate, I haven't noticed a difference in my speakers. I have a pair of LS9s and an LSC by the way.