Keep you PoE Wi-Fi access point online during load shedding.
Back Power for 140 Minutes
Device List:
| Function | Device | Model | Volt | Rating | Wh |
| PoE Switch | UTEPO 8 port | NW110-4 | 54V/48V | 2.2A | 118.8 |
| Cameras | Hikvision 2MP (8 units) | DS-2CE16D0T-IRF2.8MM | 12V | 0.3A X 8 = 2.4 | 28.8 |
Total Wh = 118.8
- UTEPO 8 port PoE Switch connected to the 48V DC power port
- 8 Hikvision 2MP PoE IP Cameras connected to the 8 port PoE ethernet ports
- Uplink Port connected back to the main NVR.
Theoretical backup time for Power-Buddie DC UPS 75Wh = 37.8 Minutes
This is calculated (UPS Wh (75) \ Total device Wh (118.8) * 60 minutes)
For the above mentioned scenario, the Power Buddie DC UPS 75Wh (24000 mAh) provided backup power for 140 minutes.
Comparing this to a generic 2kva UPS with 2x 12v 7ah lead acid batteries we got a total run time of 84 minutes.
Why does it appear that the UPSes are performing far better than what they are rated for? Most devices, although not always the case, use substantially less Watts than their maximum rating. Hence why it seems that the UPSes are performing better than expected. The theoretical maximum of 118.8W were never observed, the UPS reached a maximum of 29W during startup and averaged between 25 and 27W.