Originally Posted by Rodrigoslr
Ive read your instructions about using independent power supplies for each meter, but I was wondering if youve ever tried a converter to direct convert 220v ac to 5v dc, just like the one bellow. So that, we will use only one power supply (5v) to both meters.
I know that you have the knowledge and hands on this subject, but dont you think that this could work?
You posted this same question on my forum but I might as well answer here as well...
Yes, we used to use exactly something like that for our pre-built panels. Example:
We stopped because most required an internal board modification because of the way they were built. Most times you cannot just use them as is because of the non-isolated way the insides are wired - the same issue with sharing a single power supply/transformer with both meters. So I don't recommend them unless you have a good understanding of what sort of low level circuit board changes may be required and are willing to make those changes. Given that all brands are different detailed instructions can't be given so you have to have a good understanding of electronics to be able to reverse engineer the combined specific power supply you're looking at.
You'd still need to use separate supplies for the reasons previously stated.