Availability guarantee
Also known as: Availability SLA
A contractual obligation specifying the minimum percentage of time (typically 95–98%) the BESS must be operational and able to deliver its contracted performance — such as energy capacity or charge/discharge power. Defined in Service Level Agreements (SLAs) provided by the EPC contractor, service provider, or equipment manufacturer. Breaches trigger liquidated damages.
In energy storage
Availability is calculated as a percentage of total hours in the measurement period, excluding agreed carve-outs such as scheduled maintenance, force majeure, and grid operator curtailment. The O&M provider or OEM typically bears the availability obligation, and their exposure is capped through LD schedules tied to the shortfall below the guaranteed threshold.
Also available in: Svenska