Screw piles have been used for multiple applications over the years. Versatile, durable, and cost-effective, they’re capable of being deployed in a wide range of conditions, many of which would be unsuitable for other foundation types. But recently, there’s one area where screw piles have proven themselves particularly invaluable, and that’s within the renewable energy sector. They’re being used to anchor solar arrays, to support wind turbines, and notably, in the infrastructure of Battery Energy Storage Systems (BESS).
How Screw Piles are Powering the BESS Revolution
How are screw piles used in BESS infrastructure?
As demand increases for renewable energy, the more call there has been for large-scale energy storage systems. Their role is to provide stability to energy networks by storing excess energy during periods of high generation and discharging it when demand peaks. Screw piles play a crucial role in enabling the installation of these systems, delivering reliable, cost-effective, and sustainable foundation solutions.
Why are screw piles so useful in BESS installation?
There are multiple reasons why screw piles have become the go-to foundation system for BESS installation.
They’re quick and easy to install
Because screw piles are designed to be installed into the ground like large screws, installation requires no excavation. This means that installation is faster and more flexible than with most other foundation types. No heavy machinery is required—a single excavator will do the job, and you can even use specialised machinery to install them by hand in sites with restricted access. And because no concrete is involved, there’s no wait time. The screw piles are ready to use immediately after installation. It is also worth noting that screw pile installation does not require a costly piling mat to be installed in contrast to large scale CFA piling.
Screw piles are stable and durable
At UK Helix, our commercial screw piles come with a 100-year warranty. They are designed to last. But more than that, they’re designed to provide long-term stability. Solar arrays and windfarms are typically sited in exposed areas in order to maximise productivity. But this can mean that structures, including BESS installations, can be exposed to high winds. If installed properly, screw piles can withstand extreme lateral force, ensuring stability and resilience.
There’s minimal ground disturbance
As mentioned above, there is no excavation required for screw pile installation. This not only makes installation quicker and easier. It means that they can be used in environmentally sensitive areas. In places where other buildings may be impacted by heavy groundworks. In tree preservation areas. And in places where excavation may not be viable
Screw piles support sustainability
Sustainability is at the heart of the renewable energy industry. As such, it makes sense to use as many sustainable materials as possible in its infrastructure. Screw piles can be reused and recycled. Consequently, they typically have a smaller carbon footprint than other foundation types.
Screw piles can be used in a variety of soil conditions
While screw piles do have some limitations, they can be used in a wide range of conditions not suited to other foundation types. Whether it’s heavy clay, sand, flood-prone areas, or even in water. While the latter wouldn’t be appropriate for battery storage, it still demonstrates the versatility of the screw pile!
They’re low maintenance
Once installed, screw-piles require little maintenance. Because they are designed with ‘sacrificial waste’ or an anti-corrosion coating, the risk of corrosion or degradation is minimal. Their design also makes them resistant to the challenges of soil movement. Which means that they can function reliably over long periods of time.
Screw piles are cost-effective
When you first look at the purchase price of screw piles, the cost can seem prohibitive. But when you take into account minimal installation costs, screw pile foundations frequently work out to be significantly cheaper than the alternatives. This is as much a consideration for BESS installation as it is for any other project.
Screw piles may only play a small role in the BESS revolution, but it’s an important one. By providing a sustainable, cost-effective, and efficient foundation solution for energy storage systems, they are taking us one step closer to a state of 100% renewable energy. And that is of benefit to everyone.
Do you need support finding the right screw pile foundations for your BESS system? Find out how UK Helix can help.