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Table 1: Suntub ballast values without connectors
Building height/
PV system area
Class I Class II Class III Class IV
[kg/Module] [kg/Module] [kg/Module] [kg/Module]
5m / Center 182,6 149,0 120,9 114,8
5m / Edge 228,2 186,2 151,1 143,5
8m / Center 203,5 170,7 120,9 114,8
8m / Edge 254,3 213,4 151,1 143,5
12m / Center 222,2 190,5 141,2 114,8
12m / Edge 277,7 238,1 176,5 143,5
16m / Center 235,8 205,3 156,3 114,8
16m / Edge 294,8 256,6 195,4 143,5
20m / Center 246,8 217,0 168,4 126,8
20m / Edge 308,5 271,2 210,5 158,5
The following points must be considered:
1. Table 1 is generally applicable. Load reduction according to Table 2 is possible if the individual Suntubs are
joined together (optional).
2. The load is generally determined for the edge area (= edge area of the system: first and last row plus the last
two units of a row).
The loads can be reduced for interior areas (“Centre ballast” column).
3. The edge area of the roof should be kept clear (spacing 0.2×h). Check with SolarWorld AG before installing
within this area.
4. These tables serve to determine the required ballast loads for the Suntub® Assembly System only.
The ballast loads required for each system are calculated as part of system planning.
Table 2: Suntub ballast values with connectors
Building height/
PV system area
Class I Class II Class III Class IV
[kg/Module] [kg/Module] [kg/Module] [kg/Module]
5m / Center 126,8 103,4 83,9 79,7
5m / Edge 158,5 129,3 104,9 99,6
8m / Center 141,3 118,6 83,9 79,7
8m / Edge 176,6 148,2 104,9 99,6
12m / Center 154,3 132,3 98,1 79,7
12m / Edge 192,9 165,4 122,6 99,6
16m / Center 163,8 142,5 108,6 79,7
16m / Edge 204,7 178,2 135,7 99,6
20m / Center 171,4 150,7 116,9 88,1
20m / Edge 214,2 188,3 146,2 110,1
