Solar energy systems require periodic inspections and routine
maintenance to keep them operating efficiently. Also, from time to time, components may need repair or replacement.
You might be able to handle some of the inspections and maintenance
tasks on your own, but others may require a qualified technician.
Periodic Inspection List
Here are some suggested inspections of solar system
components. Also read your owner's manual for a suggested
maintenance schedule.
Collector shading
Visually check for shading of the collectors during the day (mid-morning, noon, and mid-afternoon)
on an annual basis. Shading can greatly affect the performance of solar collectors.
Vegetation growth over time or new construction on your house or your neighbour's property
may produce shading that wasn't there when the collectors were installed.
Collector glazing and seals
Look for cracks in the collector glazing, and check to see if seals are in good condition.
Plastic glazing, if excessively yellowed, may need to be replaced
Collector soiling
Dusty or soiled collectors will perform poorly. Periodic cleaning may be
necessary in dry, dusty climates
Plumbing, ductwork, and wiring connections
Look for fluid leaks at pipe connections. Check duct connections and seals.
Ducts should be sealed with a mastic compound. All wiring connections should be tight
Support structures
Check all nuts and bolts attaching the collectors to any support structures for tightness
Piping, duct, and wiring insulation
Look for damage or degradation of insulation covering pipes, ducts, and wiring.
Roof penetrations
Flashing and sealant around roof penetrations should be in good condition.
Storage systems
Check storage tanks, etc., for cracks, leaks, rust, or other signs of corrosion.
Pumps or blowers
Verify that distribution pumps or blowers (fans) are operating. Listen to see if they come on when the sun is shining on the collectors after mid-morning. If you
can't hear a pump or blower operating, then either the controller has malfunctioned or the pump
or blower has.
Heat transfer fluids
Antifreeze solutions in liquid solar heating collectors need to be replaced periodically. It's a task best left to a qualified technician. If water with
a high mineral content (i.e., hard water) is circulated in the collectors, mineral buildup in the piping
may need to be removed by adding a de-scaling or mild acidic solution to the water every few years.
