SMA SC 500CP XT Installation - Manual (Page 67)

Ambient conditions for stationary appli-
cation Class 4C1 Class 4C2
Mean value Limiting value Limiting value
Installation sites in rural or densely populated
areas with little industry and moderate traffic
volume x x
Installation sites in densely populated areas
with industry and high traffic volume ‒ x
9.1.2 Requirements for the Support Surface
If you are using a base from SMA Solar Technology AG, you must prepare the mounting location with a subgrade.
The excavation pit must have the following properties:
☐ The pit must be excavated to the respective height of the base.
☐ A work area around the station must be available. The work area is at least: 500 mm.
☐ The corners of the excavation pit must be clearly marked.
☐ It must be possible to dump excavated material away from access routes so that the truck is not hindered during
transport.
The subgrade must have the following properties:
☐ The subgrade must be made of stone-free, compactable material without sharp edges, e.g. a horizontal lean
concrete plate.
☐ The compression ratio of the subgrade must be 98%.
☐ The soil pressure must be 150 kN/m 2 .
☐ The unevenness must be less than 0.25% (as per DIN 18202: table 3, line 4).
☐ The subgrade must have the following minimum dimensions:
Position Designation
Width 2,600 mm
Depth 1,000 mm + double foundation extension (0 mm to 300 mm)
Height 150 mm
☐ The preparation of the subgrade must ensure that the base sits
about 150 mm above ground level after installation. This will
ensure that the inverter is protected against high water levels
after heavy rain or a snow melt.
☐ If the ground is to be paved up to the inverter, a gap must be maintained between the inverter and the paved
area. The gap width is: 30 mm.
9 Appendix SMA Solar Technology AG
Operating Manual 67 SCCPXT-IA-E4-en-44