A prefabricated outdoor support pad is configured for transport from factory to field and above-grade installation on level ground to support a condenser or transformer. A flexible geosynthetic material is joined to the rigid platform along a perimeter and corners of the rigid platform. Upon installation, the geosynthetic material is inserted into the ground, forming an erosion-resisting barrier. Erosion control kits are also provided for outdoor condenser or transformer support pads. One type of the kit comprises a flexible geotextile soil retention barrier sized for attachment to the support pad and insertion into the ground and mechanical attachment members. Another type of the kit comprises a hard-walled ground-insertable soil retention barrier configured to wrap around soil under at least a corner of the support pad when the support pad is placed on grade and mechanical attachment members configured to attach the soil retention barrier to the support pad.
