Build a complete load list
Record measured or manufacturer load for every device that must remain online and include realistic headroom.
Define runtime
Ten minutes for safe shutdown is a different design from one hour of continued surveillance. Agree the objective first.
Maintain batteries
Battery capacity declines with age and heat. Testing and replacement planning belong in maintenance, not only after failure.
Project checklist
- Include PoE switches and network gateways in the load
- Document bypass and shutdown behaviour
- Test runtime under representative load
Practical takeaways
- Define the operating requirement before choosing products
- Document interfaces, failure behaviour and ownership
- Test the completed system and keep records for support
