Thank you very much but sorry to waste your time as I think I missed the point:
It is true that their recommended transformers are rated at 30VA, but that is only because those transformers are normally used to drive a traditional chime mechanism.
Install without existing doorbell or chime.https://support.eufy.com/s/article/How-to-Hardwire-Your-eufy-Wired-Doorbell-without-an-Existing-WiresI see those URL's are to do with powering existing doorbells, chimes and the eufy camera at the same time:
https://support.eufy.com/s/article/How-to-Connect-Your-eufy-Wired-Doorbell-With-Transformer-and-Chime-UK-EUhttps://support.eufy.com/s/article/How-to-Upgrade-Doorbell-TransformerBut still it says this "The eufy wired doorbell requires 16-24VAC, 30VA or above voltage. [/quote]
On it's own? Just the doorbell itself. I find it misleading.
Maybe what they mean is, as you say about the recommendations, to upgrade the existing to that recommended higher power 30va one so they'd be enough power for everything else and other things.
If they are recommending 16 to 24vac 12 to 14va power supplies which are a little less than the ones have then maybe I have nothing to worry about.
Just found this:https://www.reddit.com/r/EufyCam/comments/rm66i5/2k_wired_doorbell_power_requirements/r/EufyCam•3 yr. ago rype89
2K Wired Doorbell Power requirements
Emailed Eufy quite a bit on this and they eventually tell me that I can ignore the 30VA power requirement if I'm not using existing wires. They recommended *24v/500mA, 18V, 500mA, and **16V/800mA power adapters for use if I did not have existing doorbell wires.
So nothing to worry about.
Solved.Their recommended wall plugs for just the doorbells:
VIIVRIA 24V / 500mA doorbell transformer 12va
Voyaux 16V (18v on picture and title) / 800mA doorbell transformer 14.4va
So that makes either of these suitable:
*Zyxel JAA-1601000F 16V 1000mah 16va
** H AEN5220 24V 687mah 16.5VA
I noticed with the H AEN5220 24V, it has an unloaded voltage of 27v to 30v. I am not sure how low that is going to go in the 16-24v range on load with the doorbell and if the spikes could be a problem. Do you think this might be a bit too high or the doorbell?