POWER
The future of festival power: How load banks ensure reliability at battery-
powered events
With UK music festivals consuming millions of litres of diesel per year, major events like Lollapalooza and WOMAD (World of Music, Arts and Dance) have started experimenting with the use of battery technology to power their stages. Here, Andrew Keith, division director of load bank manufacturer Power Prove, explores the importance of load bank testing in enabling battery-powered festivals.
T
he reliability and longevity of diesel generators make them a gold standard back-up power solution and therefore commonplace in critical industries such as telecoms, healthcare and transport. Since back-up generators are typically only used in the case mains power fails, it’s easy to believe that their environmental impact is limited and contained.
However, this is not always the case. Diesel generators are often the main power source for festivals taking place in remote locations that cannot be hooked up to the grid. But, a typical diesel generator emits twice as many greenhouse gases as grid power and produces particulates such as carbon monoxide and nitrogen oxide. Unfortunately, generators are frequently run in a way that heightens their emissions. To ensure that they can handle the power requirements of the equipment they are used for during peak times, event organisers often select generators with larger capacity than is needed. Running a generator that’s too large for the demand on a low load may consume more fuel than necessary. Consequently, back in 2019, it was estimated that the UK’s music festivals collectively consumed around 380 million litres of diesel per year. This presents a problem for festival organisers looking to minimise the environmental impact of their events in line with industry pacts such as Green Events Code of Practice.
Plugging into green power In response, some festivals are beginning to embrace alternatives. Battery systems are gaining traction as a greener, quieter alternative. In 2024, the main stage at Lollapalooza was powered entirely by battery storage, cutting both greenhouse gas emissions and diesel consumption by
24
over two-thirds.
Unfortunately, the rollout of battery- powered events is slow, as many festival organisers believe they are choosing between reliability and sustainability. Given the potential operational, reputational and during a performance, it’s understandable that organisers are reluctant to fully embrace battery-powered events. But is there a way to improve sustainability
Ensuring the show goes on When incorporating batteries into a festival’s
JULY/AUGUST 2025 | ELECTRONICS FOR ENGINEERS
energy mix, organisers need assurance that the system will deliver as promised. A good way to gauge whether a battery can support the expected load is by carrying out a battery discharge test with a load bank. Also referred to as load testing or capacity testing, battery discharge testing provides a straightforward method of assessing battery health. It involves simulating a power draw to monitor how the battery performs under stress, giving an accurate picture of its usable capacity and general condition. In doing so, it reveals whether a battery system can meet the demands placed upon it during an event and for how long.
While voltage and impedance readings can provide surface-level insights, only load battery health assessments, discharge testing plays a crucial role in the transition to greener festivals. With the right testing tools in place, organisers can move forward with battery solutions with certainty.
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