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The original was posted on /r/homeassistant by /u/bob23131 on 2025-05-21 18:29:49+00:00.

Hey all,

I’ve dabbled in Energy Monitoring for awhile and seen many new low priced energy monitors listed on Amazon (Refoss, Fusion Energy, etc).

A lot of these systems aren’t using components that have proper safety certificaitons. I’m surprised some electricians will even touch these things. Heck, they’re technically “not allowed” to be sold in Amazon US/CA due to missing certifications.

There’s a reason why monitors like Emporia Energy cost a bit more. All components used in their systems have proper safety listings. They’re allowed to be installed within the panel.

Using systems like Refoss and Fusion Energy violates electrical code in US/Canada and if you ever have a house fire/etc. good luck making an insurance claim.

In EU I think the equivalent is CE listing, but be careful there too. There’s a ton of Chinese products that come with a “China Export” (edit: doesn’t mean China Export, should check all CE variants) logo that looks very similar to a CE listing. The C and E should be full circles.

Anyway, hopefully this advice saves someone some future headache.