In Great Britain, battery availability is high. 95% of batteries are available in any half-hour (weighted by rated power). But “online” doesn’t always mean “fully usable.” On average, only 76% of rated power is available for export capacity and 78% for import.

This gap matters:

• For the grid, it sets the limit on how much flexibility can be relied on.
• For asset owners, it defines how much capacity can actually be monetised.
• The reasons vary — operating strategy, state of charge, or equipment faults.

If you have any questions regarding the content of this article, reach out to the author at shaniyaa@modoenergy.com.

Key takeaways