Why are soil analysis and site preparation for installing steel support important in solar panels?
Energy infrastructure07 Jan 2025
Galvalume steel is used to harness solar power because it is coated with an aluminium-zinc alloy that protects it from corrosive elements like moisture, UV radiation, and atmospheric pollutants. The alloy-coated product contains 55% aluminium, 43.5% zinc, and 1.5% silicon by weight. Zinc also has self-healing properties that protect the steel underneath from corroding. This product has better oxidation resistance and can withstand temperatures up to 315 degrees Celsius without discolouration. Galvalume is beneficial because it is lightweight and has low thermal mass, so it dissipates heat efficiently. This helps to manage the temperature of photovoltaic (PV) modules, which improves their performance and longevity—interested in more insights? Register now for exclusive updates!
Methods for anchoring steel support structures for solar panels
- Concrete footings anchor the steel support posts. Galvalume sheets or coils undergo surface treatments like coating or painting. Depending on design requirements, the galvalume components may need to be bent or formed into supporting structures such as rails, brackets, or clamps. The size and depth of the footings depend on factors such as soil-bearing capacity and wind load requirements.
- Helical piles: helical piles, also known as screw piles, are stainless steel shafts with helical flights that are screwed into the ground. These piles provide firm anchorage in soft or sandy soils. They are often used in areas with poor soil stability or where excavation is difficult. Join our community for the latest in solar technology. Register today!
- Driven piles: driven piles are steel or concrete posts driven into the ground using specialised equipment such as pile drivers or hydraulic hammers. This method suits dense or rocky soils where drilling may be challenging.
- Auger anchors: auger anchors are screw-like devices that are screwed into the ground using machinery or manual labour. They are commonly used in softer soils and provide good holding capacity.
- Ballasted systems: in some cases, steel support structures may be anchored using ballast, such as concrete blocks or weighted frames. This method is often used when excavation is not feasible or where soil conditions could be better.
Parameters assessed in soil analysis for solar projects
- Soil composition: Soil samples reveal the mineral composition, which provides insights into their mechanical properties and load-bearing capacity.
- Soil moisture content: the moisture content can indicate its susceptibility to waterlogging. Squeeze a handful of soil to check if it sticks together and forms a ball.
