KEL 008 N&S Annual Maintenance

• Conducted on

  Date

• Prepared by

• Location
  Address

• Where a text box is not provided please append any notes required to the relevant entry by tapping the paperclip symbol next to the question/task. Images can be attached in the same way.

Inverters/AC Distribution

• Are the Inverters operating according to the manufacturer's specifications?

  Yes

  No

  N/A

• Please describe the fault and attach image(s) where appropriate

• Do the Inverters show any indication of overheating, noise or vibrations?

  Yes

  No

  N/A

• Please describe the fault and attach image(s) where appropriate

• Check wiring and connection of parts using infra-red technology and report any defects here. Attach images where appropriate.

• Are any of the warning or hazard signs damaged or missing?

  Yes

  No

  N/A

• Please identify the sign, describe its condition, attach images and replace

• Are all covers and door locks in good condition according to the manufacturers specifications?

  Yes

  No

  N/A

• Please describe the condition and attach image(s) where appropriate

• Is the humidity level in the AC cabinet acceptable?

  Yes

  No

  N/A

• Please describe the condition and attach image(s) where appropriate

• Check the dust filters and exchange according to the manufacturer's specifications

• Please note the number of the inverters for which exchanges were neccessary

• Check and clean the remaining 70% of the cooling parts, which were not cleaned in the previous 3 visits, according to the manufacturers specifcations (fans or radiators depending on the inverter) - note which inverters were cleaned

• Inverters cleaned:

• Did any of the inverter's cooling parts show signs of damage or malfunction?

  Yes

  No

  N/A

• Please describe the damage and note the inverter number. Attach image(s) if possible.

• Clean the internal parts of the inverters according to the manufacturer's specifications

• Are all labels in their correct positions and can be clearly read?

  Yes

  No

  N/A

• Please identify and describe the missing/incorrect/obscured labels, attach images, clean and replace if necessary

• Visually inspect the grounding system. Is it in good condition?

  Yes

  No

  N/A

• Describe its condition, attach image(s) where appropriate

• Visually assess the fuses and fuse holders, circuit breakers and disconnections; the fuse rating and types should align with the As Built documentation. Are the any discrepancies or reasons for concern?

  Yes

  No

  N/A

• Please identify discrepancies/reasons for concern, attach image(s) where appropriate

• Carry out thermographic inspections of the remaining 70% of the AC connections which were not inspected in the previous 3 visits.

• Record which connections were checked here

• Were any defects detected?

  Yes

  No

  N/A

• Please describe the defects and attach image(s) where possible

• Check the remaining 70% of electrical connections and connectors which were not inspected in the previous 3 visits. Connectors should be checked, electrically tested and inspected for signs of over-heating or corrosion. Any coupling should be tightened according to the applicable torque rating as specified by the manufacturer.

• Record which connections were checked here

• Do any of the checked connections show signs of overheating or corrosion?

  Yes

  No

  N/A

• Please describe the condition and attach image(s) where possible

• Is the surge protection in good working order?

  Yes

  No

  N/A

• Describe any faults and attach image(s) where appropriate

• Is the ground insulation protection (GFDI) in good condition?

  Yes

  No

  N/A

• Describe any faults and attach image(s) where appropriate

• Are the communication cables, HUBs and data loggers (comm-box) in good condition?

  Yes

  No

  N/A

• Describe any faults and attach image(s) where appropriate

• Check that there is no sign of damage by animals to the remaining 70% of the component parts which were not checked in the previous 3 visits. Did any checked components show signs of damage caused by animals?

  Yes

  No

  N/A

• Please describe the damage, note the component's location and attach image(s) where appropriate

• Identify checked components

• Is there any smell of burning or evidence of overheating from the AC equipment?

  Yes

  No

  N/A

• Please note which inverter the smell appears to be coming from

• Clean the inverter room and cabinets

Mains AC Connection to the PV System

• Check that a 10% sample of indicators, meters and instruments are functioning properly and do not present undue noise, vibration or abnormal smell. If applicable check resistors.

• Were all components functioning correctly and not presenting any of the listed concerns?

  Yes

  No

  N/A

• Please note malfunctioning components and attached images where appropriate.

• Check the warning and hazard signs. Are they in good condition?

  Yes

  No

  N/A

• Identify damaged signs, attach image(s) where possible and replace damaged signs

• Assess the correctness, readability and position of all labeling. Are any labels damaged, obscured or incorrectly placed?

  Yes

  No

  N/A

• Identify damaged/obscured/incorrect signs, attach image(s) where possible and rectify the issue

• Are the entrance barriers in good condition?

  Yes

  No

  N/A

• Describe condition, attach image(s) where possible

• Check the mains AC connection to the PV System for loose connections, signs of burning, discolouration, corrosion, embrittlement or discouloured insulation; check connections using an infra-red camera. Were any defects detected?

  Yes

  No

  N/A

• Describe defects and attach images where appropriate

• Check the operation of the mains breaker device (mechanically). Does it function correctly?

  Yes

  No

  N/A

• Describe defects and attach images where appropriate

• Check protection device ratings are per the system specification and that the discrimination between protections is achieved. Are there any issues with these?

  Yes

  No

  N/A

• Describe defects and attach images where appropriate

PV Generator

• Visually assess the soiling and shading of the panels

• Please note any shading concerns or excessive soiling its source (if determined), attached images where appropriate

• Visually check the remaining 70% of the panels, which were not inspected in the previous 3 visits, are securely retained in the mounting system structure

• Were all panels checked securely retained?

  Yes

  No

  N/A

• Please note the panels location, and attach images of the issue

• Check a sample section of 10% of the panels are securely retained in the mounting system structure and retighten any loose connections using the torque as required by the mounting system structure manufacturer. Were there any loose connections?

  Yes

  No

  N/A

• How many loose connections were found? Please list and describe the location of all loose connections found

• Check a 10% sample of the PV mounting system for structural integrity. Were any frames found to be structurally unsound?

  Yes

  No

  N/A

• Please identify and describe the PV frames which have structural issues

• Check and test the remaining 70% of the DC connectors which were not checked in the previous 3 visits (DC string combiner box and both serial and parallel connections)

• Record which connectors were checked

• Did any of the DC connectors present reason for concern?

  Yes

  No

  N/A

• Please describe the concern and attached images where appropriate

• Check the solar cables for damage, fixings and containment

• Were any of the solar cables or their fixings & containment damaged?

  Yes

  No

  N/A

• Please describe the damage, note the location and attached images where appropriate

• Assess a 10% sample of the grounding connection points, their possible repair, conservation, and corrosion, that connections are tight and insulation does not show any embrittlement. Were any issues identified during these checks?

  Yes

  No

  N/A

• Please describe any issues identified and attach images where appropriate

• Do any of the panels show signs of mechanical damage or abnormal discolouring?

  Yes

  No

  N/A

• Please describe the condition, note the location and attached images where appropriate

• Visually assess all sensors, clean all reference cells and pyranometers. Are all components in good condition?

  Yes

  No

  N/A

• Please describe the condition, note the location and attached images where appropriate

• Recalibrate payranometers

• Carry out a 10% sample check of modules and strings with power meter, record results here (Isc, Voc)

• Carry out thermographic imaging of a 10% sample of strings

• Were any defects detected?

  Yes

  No

  N/A

• Please describe the defect, note the location and attached images where appropriate

Bird Deterrent Equipment

• Assess and test the components of the Bird Deterrent Equipment

• Are all components in good condition?

  Yes

  No

  N/A

• Please describe the condition, note the location and attached images where appropriate

Cleaning of panels

• Clean panels where dirt, debris or bird droppings are present

• Please note the location of any panels where excessive soiling was present