Excellent project, but the shading on the solar panels from the railings is more than likely severely reducing the output of the panels at lower sun angles. Eve

Excellent project, but the shading on the solar panels from the railings is more than likely severely reducing the output of the panels at lower sun angles. Even shading a single cell on a series connected panel effectively reduces the output of ALL cells. Also having peak power tracking would increase panel utilization. I really like the power monitoring using the Arduino though.