Emergency shutdown will be providing a simple method to de-energise solar system easily to ensure a safe condition on the roof of a building during a fire, error or maintenance of the system.
The shutdown and isolation procedure of the PV system is provided on a sign located next to each inverter. If parts of the PV system or the whole PV system needs to be shutdown, follow the instructions on those signs. Alternatively carry out the following steps for each individual inverter installed in this order.
1. Switch OFF “SOLAR SUPPLY MAIN SWITCH” in the main switchboard or meter box. This is the protective device upstream of the inverter, by this action you will disconnect grid voltage but and DC voltage still present by connect to the PV array.
2. Switch OFF all DC isolators NEXT TO THE INVERTERS, by this action you will disconnect DC voltage both positive and negative connection at the same time.
3. If work on panels or cabling from the rooftop is being conducted, Switch OFF all ROOF TOP DC isolators otherwise the rooftop isolators can be left active, consider that PV modules cannot be de-energised during daylight. If work on panels or cabling from the rooftop is not being conducted, the rooftop isolators can be left active.
Please note that work on and near the panels should only be conducted by a qualified person, such as an electrical contractor or accredited installer. Access roof if following safety requirements for working in heights.