PV Solar Flat Roof Mounting System – BallastBox for PV Modules
The BallastBox flat-roof mounting system allows for the secure installation of photovoltaic modules
on flat surfaces—without any drilling or damage to the roof membrane. Ideal for
flat roofs made of membrane or bitumen, terraces, garages, lawns, and all surfaces with a slope of ≤ 5°.
With its large base area, durable recycled PE-HD material, and the option for custom filling at
(sand, gravel, soil, concrete), the BallastBox offers a durable,
stable, and flexible solution for residential and commercial PV systems.
Benefits of the BallastBox
- Installation without drilling —no damage to the roof membrane
- Large installation area – ideal for membrane and bitumen roofs
- Versatile – flat roof, patio, lawn, garage
- Durable PE-HD recycled material – UV-stable, impact-resistant down to -40°C, dimensionally stable up to +80°C
- Module width 1134 mm – other sizes available upon request
- Mounting hardware included – clamps, screws, connectors
- Strings of any length —ideal for larger PV systems
- 10-year manufacturer’s warranty
- 0% VAT is possible under Section 12(3) of the German Value-Added Tax Act (UStG) for eligible PV users
Technical data
| Material | PE-HD recycled material |
| UV resistance | Lifetime UV stability |
| Impact resistance | down to -40°C |
| Dimensional stability | up to +80°C |
| Net weight | approx. 4.5 kg |
| Angle of attack | 15° |
| Dimensions | 1150 × 525 × 458 mm |
| Volume | approx. 120 liters |
| Footprint | 0.3135 m² |
| Module width | 1134 mm (± 3 mm) |
| Certificates | CE, RoHS |
Load & Filling
The BallastBox can be filled in a variety of ways:
- Sand: 156–195 kg → Maximum surface load: 676 kg/m²
- Gravel: 180–195 kg → Maximum surface load: 676 kg/m²
- Soil: 156–195 kg → Maximum surface load: 676 kg/m²
- Concrete: up to 325 kg → maximum surface load of 1091 kg/m²
- Stone / Metal: also possible
In the worst-case scenario, a PV module (18–25 kg) is distributed across two boxes:
25 kg / 2 + 4.5 kg = 17 kg net weight per box.
Variants
- No. 1: BallastBox for module width 1134 mm, thickness 30 mm
- No. 2: BallastBox for module width 1134 mm, thickness 40 mm
What’s Included
- BallastBox Flat Roof Mount
- Clamps & Screws
- Connectors for in-line mounting
Notes
Type approval is not required, as the BallastBox is considered a mobile, non-fixed part
of the building.
Available immediately from our warehouse in Wremen (CUX).
