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solar mains switchover over

Submitted by Andre on
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Hi,

I have a cctv system running in my garden shed using around 11W, running from a small UPS connected to mains power.

On the roof I have a 19V 40W solar panel connected to a charge controller charging 12V battery. That is hardly being used so I want to use that to run the CCTV during the day and switch over to mains when the output on the solar panel drops to below threshold.

What I was thinking is to have ESP32 connected to a relay and the UPS power supply connected to NO, mains connected to COM and solar inverter output to NC.

Would that work?

Or is there a better way of doing it?

Thanks

Aswinth Raj

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Were you able to solve this ? I am getting same problem

   Joined August 16, 2016      1000
Tuesday at 12:29 AM

debramartin

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Using an ESP32 with a relay is doable but not ideal for critical systems like CCTV. Relays can introduce a brief power loss during switching, potentially restarting your system. Instead, consider a dual-input UPS or a solar inverter with automatic changeover functionality. These devices manage transitions smoothly without service disruption.

   Joined December 06, 2024      1
Friday at 08:31 PM