We use approximately 5800 KWs a year and they promise they can generate more than that after the site survey. We also can buy them out at any point and my wife wants to do that after the first year, but I prefer to wait as we will need to replace the roof before I retire in 8 years. If they still own it then, they will remove the panels so the roof can be done and replace them again at their cost. After that we’ll buy it out and should get a year rebate from our power company instead of a monthly bill. Until then we will pay them 11 cents per kilowatt verses the 26 cents we pay now with any additional watts produced beyond the 5800 being ours.