Around the world, disasters caused by climate change are upending communities and wreaking havoc on utilities. Nowhere is this more apparent than in California, where wildfires have cost the state between $70-90 billion in damages – and one-eighth of its acreage. The company – the state’s leading commercial and residential utilities provider – faced an increasingly common task: supplying emergency power to impacted neighborhoods. But this created an even bigger problem. How can a utilities provider meet emergency power needs without contributing to the root cause of the emergency? How can it balance immediate needs caused by climate change with long-term net zero goals? The answer – by reaching out to Aggreko, a long-standing trusted partner.

Aggreko’s process engineers developed a simple hybrid generator-battery system comprising three 200 kW diesel generators and a 1 MWh battery that received its charge from an existing solar array on the grid. The goal of the project was to reduce diesel consumption of the redundant generator by utilizing stored solar energy in its place. Two active generators would provide ample temporary power for most situations. While a third generator, left on standby, would both provide redundancy and balance load sharing while the battery charged. This allowed the system to run smoothly at all times without sacrificing efficiency or redundancy. Most notably, it drastically reduced diesel use and emissions in comparison to traditional emergency power systems. We piloted the system in the company’s wildfire prevention program for the power project in Foresthill, California.