Mounting the Inverter on the Roof
WARNING
Risk of falling when working on the roof
There is a risk of falling or slipping when working on the rooftop. Observe the applicable accident prevention regulations for work on rooftops.
- Before stepping on the rooftop, ensure the load bearing capacity of all parts subjected to load.
- In accordance with the accident prevention regulations, a safety harness must be worn or a safety scaffold must be used.
- Use a fall protection.
When mounting the inverter on the roof underneath the PV modules, proceed as follows.
You can mount the inverter with the back panel or with the enclosure lid to the roof. SMA recommends mounting the inverter with the enclosure lid to the roof. This will allow for better heat dissipation. Observe the minimum clearance of the inverter to the PV module ( > Requirements for Mounting the Inverter).
Information on the figures in this section
The figures show the recommended mounting option for the inverter with the lid facing the roof. The procedure for mounting the inverter with the back panel facing the roof is identical and is not depicted in the figures in this section.
Position of the inverter
In order to ensure optimum operation and long electrical endurance of the inverter, install each inverter centered under the respective junction box of the PV module.
Additionally required mounting material (not included in the scope of delivery):
- The required fastening material must be selected according to the profile rail used.
- The mounting material must be made of stainless steel.
- Diameter of the screws: maximum M8 (0.3 in)
NOTICE
Damage to the PV module due to screws being too long
The length of the screws must be suitable for the clearance between the inverter and the PV module bottom side.
- Make sure that the PV module is not damaged by the screws being used.
There are several options for attaching the inverter to the framework on the roof. In the following example, mounting with T-head bolts is described.
Procedure:
- Keep the supplied mounting overview at hand for the allocation of the inverters to the PV modules.
- In case the connection area points upwards during mounting, make sure to protect the plugs and pin connectors against ingress of moisture.
- Remove the label with the inverter serial number from the inverter and attach it to the corresponding position in the mounting overview included in the delivery.
- Insert the T-head bolts into the profile rail and turn by 90°. This will firmly anchor the screws in the profile rail.
- Position the inverter on the anchored screws. Insert the screws into the oblong holes in the enclosure as far as the required fastening point.
- Attach the inverter using suitable washers and nuts.
- Ensure that the inverter is securely in place.
