How does pumped hydro storage compare to batteries?

What are the main differences between pumped hydro storage and batteries?

Pumped hydro storage uses gravitational potential energy, while batteries store energy chemically. Pumped hydro is typically more efficient for large-scale storage.

Which one is more cost-effective for large energy projects?

Pumped hydro storage generally has lower operational costs for large-scale projects, but the initial setup can be expensive compared to batteries.

How do their efficiencies compare?

Pumped hydro storage can achieve efficiencies of around 70-90%, while lithium-ion batteries typically range from 80-90%.

Are there any environmental concerns with pumped hydro?

Yes, pumped hydro can impact local ecosystems and water resources, while batteries have concerns related to mining and disposal.

What about the lifespan of each technology?

Pumped hydro systems can last for decades, while batteries may need replacement every 5-15 years depending on the type.