A seemingly rising and potentially reasonable concern for rooftop and ground mount solar installations is sun glare that can shine on neighbor houses and be a nuisance. I saw a TV report on one case like this, and it's a concern among some members of my HOA. My wife and I think it's a potentially reasonable concern. This is going to be possibly a bigger issue for ground mount, and less an issue for rooftop solar. But it could still be an issue even with rooftop. My wife and I are attempting to do a glare study by accurately modeling our roof and neighboring houses and analyzing reflections from the rooftop over the range of sun elevation between winter and summer north to south and throughout the day east to west. We hope from this we can determine which parts of the roof, if any, will cause glare issues on neighboring houses, and then avoid installing panels on those spots. The model we are using is a physical scale model of the neighborhood and roof, using the highest accuracy we can. Sun angle information I obtained from an online sun earth tools website that seemed reputable. We thought about doing calculations by hand, or trying to do a computer simulation of some sort, but I think the physical model will provide better visualization and be more consumable by the HOA in our solar proposal. We have potential roof area on the east, west, and south facing sides of the roof. I'm pretty sure there will be no problem with the south facing roof, but I'm not so sure about the east and west roofs. I'm curious if any of you have looked into this problem before installing solar, or if you have installers who analyzed this before doing an installation. If so, how was it done?