Black start
Black start in the SpeicherCampus context: important for island and backup power systems. Technically, the term is usually described as starting without existing grid voltage.
What does black start mean?
Black start is a system’s ability to start without any grid voltage present and to build up a grid. For storage this means: even when grid and island are completely dead, the system can boot on its own, start its PCS in grid-forming mode and connect the backup circuits one by one.
Without black-start capability, the storage system needs an external voltage source to come up — in the worst case exactly when none is available.
What matters in practice
- for backup and island concepts, verify black-start capability explicitly
- the system’s own consumption (control, cooling) must be suppliable from the battery
- consider restart after deep discharge separately
- stagger load pick-up after the start (not all circuits at once)
Practical example
After a long outage, a business’s storage system is empty and shut down. When the grid returns it restarts automatically — with black-start capability it could already have supplied emergency lighting and controls from its remaining reserve.
The SpeicherCampus perspective
SpeicherCampus treats black start as a detail with large consequences: in backup power concepts it is always verified; in pure self-consumption projects it can be skipped.