The reliability of a solar system depends on the quality of the installation. Most system issues develop from improper installation which may not reveal itself for years after installation. Here are some photos of issues I have encountered through years of servicing systems in NY and CO.

Water infiltration

Improperly torqued wire connectors

Poor rooftop wire installation

Testing solar panel

Improperly torqued wire connections

Undersized wires showing signs of wear

Water/condensation infiltrating inverter

Water infiltrating inverter

Overtorqued solar panel clamp

Blown fuse

System fault

Improperly installed solar panel

Improper underground wire splice