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UPS to keep broadband and wifi available during power outages

downfield · 2026-06-06T10:14:22Z

We had a short power outage during a thunderstorm last week and when the power came back we had a wifi signal but no connection to the broadband signal. This happens surprisingly often and also when an electrician turns the power circuits off for maintenance additions. So my question is: is anyone using / can anyone recommend a UPS with about 500Wh capacity to keep the broadband working. We need to power 1 a fibre /ONT box using 5 - 10W 2 the PlusNet2 router using 10W 3 a TP-Link 4 port hub supplying 3 PoE Wireless Access Points using 50W so the total load is around 70W. Allow for 6 hours outage gives 420Wh so round up to 500Wh. Note that all the units use different voltages so I don't think I can use a DC UPS.

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downfield

(@downfield)

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Joined: 2 years ago

Posts: 154

Topic starter 29/06/2026 10:03 pm

Posted by: @old_scientist

↑

Maybe find an old one on freecycle and put a new battery in it.

I didn't quite manage that but I did find an APC Smart 1000 on eBay for £60 without a battery and bought a new 3rd party battery for £110 so all set up for a reasonable amount.

Thanks for the advice!

Mitsubishi Zubadan 14kW with Mixergy 210l DHW in 220m2 barn property. 24 solar panels = 9kWp with GivEnergy 5.0kW Hybrid inverter and 19kWh GivE batteries. Jaga Strada fan-assisted rads throughout. Landvac vacuum glazing/triple glazed windows.

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