Maintenance Steps

Step 1: At the Inverter
  We use a electricians’ tool called a multimeter to check and record the inverter’s operating DC input voltage and current level and on the AC side, and the inverter’s output voltage and current levels. Most inverters have display options for checking the AC and DC side of the system (if your inverter doesn’t have an option to check current and voltage levels, then we use our equipment to do so). Check that the appropriate LEDs are lit up to indicate proper operation of the inverter. If the inverter can display the total kWh produced since it first started up, then we record that amount. Finally, we use this number to compare the PV system’s production since the last inspection.

Step 2: On the Roof

  It's important for us to note and record the condition of the modules. Look for signs of degradation (for example, color changes, fogged glazing, de-lamination, warping, or water leaks), cracked glazing, and bent frames on the modules. Tighten all loose nuts and bolts (if needed), holding the modules to the mounting rack and to the mounting clips. Secure any loose wiring under the modules. Check the wiring for signs of chewing by squirrels, and look for cuts, gashes, or worn spots in the wiring insulation. Replace any damaged wire runs. Check the frame ground connections between modules and from the modules to the junction box(es). Check to see that the sealants around all building penetrations are in good condition and all conduit connections are tight. We will repair all non-electrical repairs if necessary. Note any problems that can be corrected at a later time or at the next scheduled inspection time.

  We also make all efforts to remove all sources of shade on the array and rinse the array to remove the accumulated dust, dirt, and other debris. Some debris, such as bird droppings, may need to soak a bit to fully remove it.