Post power cut emonpi is stuck at "Raspberry Pi Booting..."

IME a simple surge plug https://www.amazon.co.uk/Belkin-BSV102af-SurgeCube-Surge-Protection/dp/B00OLTJSZY/ is sufficient.

Lots of different UPS solutions - me I have a UPC 750 I bought off ebay and new batteries from Farnell. Provides UPS to all my core network gear (and a second one for the Broadband Router).

For the most robust system I have, I put Proxmox VE onto an old laptop and put emoncms onto a Ubuntu Container. That setup has a builtin UPS :slight_smile:

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Many thanks for posting this. Recently had a similar problem. Data recovered perfectly.