SMA SB 240 - Manual (Page 23)

5.2 Mounting the Inverter
5.2.1 Mounting the Inverter on the Roof
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 Solar
Technology AG 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 (see
Section 5.1 "Requirements for Mounting the Inverter", page 20).
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 8 mm
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.
5 Mounting SMA Solar Technology AG
Installation Manual 23 SMA-SB240-IA-en-12