SunPower has just released the latest version of pvfactors (v1.2.0), a Python package for modeling the incident irradiance on bifacial photovoltaic (PV) which are solar panels that can generate energy from both the front and back surfaces. PyPI: https://pypi.org/project/pvfactors/ Thanks SunPower! -- Mark Mikofski, PhD (2005) *Fiat Lux*