Secondary Deadend Clevis for Reliable BESS Grids
Acciona Energy has announced intentions to install a 196 MW/980 MWh battery energy storage system at its 246 MWp El Romero solar facility…
Secondary Deadend Clevis for Reliable BESS Grids

Solar integration with BESS
Acciona Energy has announced intentions to install a 196 MW/980 MWh battery energy storage system at its 246 MWp El Romero solar facility in Chile. The technology will improve renewable energy management, shift solar generation, increase grid stability, and reinforce local electricity supply security. The BESS will also work with the existing solar generation, transmission, control, and energy management infrastructure. This will be critical in developing a highly flexible renewable energy asset. The integration process entails collecting extra solar energy from PV arrays, converting generated DC power to grid-compatible AC power, charging battery modules, and storing energy. This integration will cut transmission hookup costs, speed up project development, and reduce the environmental impact. Acciona energy will maximize the existing solar plant while reducing extra construction requirements. These connections uses the secondary deadend clevis to link and provide secure attachment points within the network.
Secondary deadend clevises provide a mechanical connection between heavy insulators and structural supports. It guarantees that the insulators containing live conductors are connected to the plant’s infrastructure. The deadend clevis absorbs and distributes dynamic mechanical loads caused by winds, as well as thermal expansion and contraction. They cut concentrated stress areas that could harm conductors or insulators. The clevis design enables articulation between stiff structures and moving wires. It also helps to attenuate micro-vibrations that pass through conductors. This helps to reduce metal-to-metal fatigue and protects insulation from cracking. The clevis prevents conductor failure by making strong and solid connections. It ensures that the high-capacity power evacuation from the BESS to the grid continues uninterrupted.
Quality control of secondary deadend clevis utilized in BESS and solar integration projects in Chile
In projects such as Acciona Energy’s solar plus storage development, the secondary deadend clevis is used for transmission and distribution line fitting. It keeps conductors, ground wires, and other gear under mechanical stress. Conducting quality assurance contributes to long-term reliability, safety, and grid performance. QA guarantees that the clevis meets the stated mechanical load requirements, retains structural integrity, and resists corrosion in desert and coastal environments.

Secondary deadend clevis
The procedure consists of raw material verification, dimensional inspection, mechanical strength testing, and non-destructive testing. Quality assurance measures during manufacturing include monitoring forging temperature, validating heat treatments, controlling machining precision, managing tool wear, and inspecting surface finishing. Quality assurance guarantees that the clevises can resist the severe working circumstances of large-scale renewable energy infrastructure. This is while providing the reliability, safety, and service life for modern solar-plus-storage power systems.
The role of the secondary deadend clevis in solar-plus storage installations
The secondary deadend clevis ensures a stable mechanical connection between conductors, insulators, and support structures. It contributes to the reliable transmission of electricity from renewable energy installations to the grid. Here’s how they fit into Chile’s BESS and solar PV integration infrastructure.

Deadend clevis
Providing secure conductor termination — the deadend clevis connects deadend assemblies to insulator strings and support structures. The clevis anchors conductors under tension, maintains mechanical stability of transmission lines, and prevent conductor slippage.
Transferring mechanical loads — the secondary deadend clevis transfers the loads from conductor assembly to insulator strings, poles and towers, and substation support structures. The clevis prevents excessive stress on individual components.
Supporting solar and BESS grid integration — the clevises contributes to grid integration by securing overhead conductor connections and supports transmission line reliability.
Maintaining insulator string alignment — the deadend clevis helps maintain correct positioning of insulator strings, prevent excessive bending stresses, and improve assembly performance.
The BESS project supports Chile’s renewable growth and grid reliability
Acciona’s Energy’s proposed BESS system at the El Romero solar project is an important milestone in Chile’s transition to a cleaner electrical supply. Large-scale battery storage is critical for ensuring grid stability and increasing the value of solar power. Here are its contributions to renewable growth and grid reliability in Chile.

BESS integration with solar PV
Reducing renewable energy curtailment — the El Romero BESS will store excess solar energy, reduce curtailment of photovoltaic generation, and improve use of renewable energy assets.
Enabling higher renewable energy penetration — the BESS will help absorb excess renewable energy, release stored energy when renewable output declines, and supports integration of renewable projects.
Improving grid reliability — the battery system responds to changing conditions to stabilize frequency, support voltage regulation, and reduce power fluctuations.
Supporting transmission network efficiency — the BESS will help reduce challenges related to congestion. This is through storing electricity, reducing pressure on transmission lines, and optimizing use of existing grid infrastructure.
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