Bypass Diode
A small electronic component inside solar panels that allows current to flow around shaded or damaged cells, preventing them from becoming resistive loads that heat up and reduce output.
Why It Matters
Bypass diodes prevent hot spots that can permanently damage panels. They are why partial shading reduces output proportionally rather than shutting down the entire panel.
Related Terms
Shading Analysis
An assessment of how trees, buildings, or other objects cast shadows on your roof throughout the year, affecting solar production.
Clipping
When a solar inverter limits output because the DC input power from the panels exceeds the inverter's AC output rating. The excess energy is lost.
Soiling Loss
Energy production lost due to dirt, dust, pollen, bird droppings, or other debris accumulating on solar panel surfaces and blocking sunlight.