Solar Design:
NREL PVWATTS, for calculating system production based on location: https://pvwatts.nrel.gov/
SunEarth Tools, great tools for system design (like sun position, shadow and azimuth mapping): https://www.sunearthtools.com/
Google Project Sunroof, explore your potential solar capacity: https://www.google.com/get/sunroof
Our sites on Green Building:
River Trail Condo: https://sfrivertrailcondo.com
Green Casitas: https://greencasitas.com