1. Solar PV On-Site Guide Solar PV On-Site Installers Guide

2. Solar PV On-Site Guide On arrival at the site, check and confirm the following Scaffolding is in place and safe to use Materials and equipment are on site System design documents are available

3. Solar PV On-Site Guide Familiarise yourself with the site and confirm the expected location of the panels and the electrical fittings

4. Solar PV On-Site Guide Internal works Fix the inverter securely into the selected position Allow correct air spaces as per manufacturers instructions

5. Solar PV On-Site Guide Internal works Fix the DC isolator switch(es) into position

6. Solar PV On-Site Guide Internal works Fix the AC isolator switch in position

7. Solar PV On-Site Guide Internal works Attach the cabling between the inverter and the switches

8. Solar PV On-Site Guide Internal works Complete the installation of the DC switch(es) and label them

9. Solar PV On-Site Guide Internal works Position and install the generation meter and main AC isolator switch Usually this is to be located adjacent to the distribution board

10. Solar PV On-Site Guide External works Use an experienced roofer to install a proprietary roof entry for the DC cables to pass through the roof

11. Solar PV On-Site Guide External / Internal works Feed the DC cables through the fitting and into the internal roof space.

12. Solar PV On-Site Guide External works Record the voltage (VOC) and current (ISC) values for each panel.

13. Solar PV On-Site Guide External works Use an experienced roofer to fit the brackets in place

14. Solar PV On-Site Guide External works Measure and square up the rails when fitting.

15. Solar PV On-Site Guide External works Position the required length of DC cable and secure with zip ties.

16. Solar PV On-Site Guide External works Bring the panels safely up to the installation level. Take extra care if it is windy.

17. Solar PV On-Site Guide External works Align the first panel and fix in place.

18. Solar PV On-Site Guide External works Fix the panels in place ensuring they are straight and square. Pay special attention to positioning the first panel in a string.

19. Solar PV On-Site Guide External works Add further panels, keeping the alignment. Connect the panel cables as each one is fixed in place.

20. Solar PV On-Site Guide External works Secure each panel in place.

21. Solar PV On-Site Guide External works With the panel array(s) in place and connected, return to the inverter for testing and commissioning.

22. Solar PV On-Site Guide Internal works Complete all AC tests in accordance with BS7671 Inspection & Test

23. Solar PV On-Site Guide Internal works Complete tests on DC circuitry including: IR tests VOC tests ISC tests Irradiance level tests

24. Solar PV On-Site Guide Internal works Ensure all electrical components are fully labelled.

25. Solar PV On-Site Guide Internal works Place a system schematic at the inverter location, and at the main consumer unit for the property