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To keep an OBS stream running through a power cut, put both the streaming computer and the modem/router on a UPS or another suitable backup supply. Size it for the equipment’s actual combined load and the amount of backup time you need. A UPS can bridge only the outage it has runtime for, and it cannot prevent a separate internet-service failure. After power returns, check OBS and the event in YouTube Studio rather than assuming the same live stream resumed.
What a power cut can interrupt
OBS sends your video to YouTube’s ingest server over your internet connection. A mains outage can switch off the computer running OBS, but it can also switch off the modem or router. Backing up only the computer is not enough if the network equipment loses power. Even with both devices powered, a separate ISP outage can still interrupt the stream.
OBS Project’s Stream Connection Troubleshooting guide, published September 30, 2024, identifies dropped frames and intermittent disconnections as network issues between the computer and the remote ingest server. It recommends wired networking where possible because Wi-Fi may be unstable for streaming.
Before an outage: prepare the power and network
Choose backup power for the real load
- List what must stay on. Include the streaming computer and the modem/router. Add any other essential network device that needs power for the stream to reach the internet.
- Work out the simultaneous watt load. Use the equipment labels or manufacturer specifications to establish the load when the devices are operating together. Select a UPS with suitable capacity and headroom; do not choose by a headline VA number alone.
- Set a realistic runtime target. Check the UPS manufacturer’s runtime information at your expected load. Runtime depends on load, battery condition, and operating conditions, so a generic number of minutes or hours cannot be promised for an unspecified setup. If the desired backup period exceeds what the UPS can provide, plan another suitable backup source.
- Connect devices to battery-backed outlets. Some UPS outlets may provide surge protection without battery backup. Verify the outlets and connect both the computer and network equipment to battery-backed ones.
- Check compatibility for separate router batteries. If using a dedicated modem/router battery backup, confirm output voltage, current, polarity, connector, and device compatibility against the equipment label and manufacturer documentation.
Schneider Electric India’s UPS buying guide explains that runtime varies with load and that connected equipment affects how long battery power lasts. Battery age and conditions also matter.
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#1 Best Overall
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Make the network more dependable
- Connect the OBS computer to the router by Ethernet where feasible. OBS notes that Wi-Fi can be unstable for streaming.
- Check cables and network equipment, not just OBS settings. A damaged cable, router/modem problem, network card issue, or ISP interruption can all affect the outbound connection.
- Keep access to OBS and the relevant YouTube Live Control Room event available so you can check the encoder and the stream separately.
Test before relying on the setup
YouTube’s live streaming tips recommend setting up encoder streams in advance, starting the encoder early, checking the Live Control Room preview, monitoring audio and video, and confirming the local archive is growing and the event is accessible. Test the UPS arrangement separately under safe, controlled conditions so you know which devices stay powered; do not wait for an actual outage to discover that the router was on a surge-only outlet.
YouTube also describes testing encoder failover by stopping the primary encoder or unplugging its Ethernet cable and checking whether the player rolls to a backup encoder. That test is for a configured failover setup; it is not a guarantee that a single OBS computer will recover after losing power.
Rank #2
- 5-in-1 USB-C Hub: Experience comprehensive connectivity featuring a Power Delivery input, two USB-A 2.0 ports, a USB-A 3.0 port, and an HDMI port. (Note: The USB-C power delivery input port is only for connecting an external wall charger to power your laptop and cannot power peripheral devices.)
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After power returns: restore and verify the stream
- Confirm power and internet. Check that the computer and modem/router are on, and that the internet service is available.
- Inspect OBS. Check whether OBS is connected and sending. If it remains disconnected, review its connection state and log before troubleshooting further.
- Open the relevant event in YouTube Studio. In the Live Control Room, check whether the event is still active and inspect stream health, video, and audio. Confirm what viewers can actually see before announcing that the stream is back.
- Restore the encoder connection if needed. If OBS is not sending, restore its configured connection and check the event again. Do not share the stream key while troubleshooting; use YouTube’s credential controls if a key needs to be replaced.
- Check the recording or archive. Verify the local recording or archive file before closing applications. YouTube’s preparation guidance recommends checking archive growth and integrity.
- Separate encoder trouble from internet trouble. YouTube’s live stream troubleshooting guide advises checking the encoder and outbound internet separately. If OBS output appears healthy but YouTube receives a poor or absent stream, investigate the connection and contact your ISP if the problem persists.
The official OBS and YouTube guidance cited here does not establish a universal recovery window after a complete PC power loss or guarantee that restarting OBS will resume the same live event. Check the actual event and stream health instead of assuming the outage was brief enough for recovery.
What to compare when choosing backup power
| Factor | What to check |
|---|---|
| Capacity | Whether the UPS capacity suits the simultaneous watt load of the computer and network equipment, with suitable headroom. |
| Runtime | Manufacturer runtime information at your expected load; actual runtime varies with load, battery condition, and operating conditions. |
| Connections | Whether both the PC and modem/router can use battery-backed outlets rather than surge-only outlets. |
| Compatibility | For a separate network-device battery, confirm voltage, current, polarity, connector, and equipment compatibility. |
| Longer outages | Whether the runtime target requires another suitable backup source beyond the UPS. |
Or let it run in the cloud
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Quick Recap
Best Value
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Rank #4
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Rank #3
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