I’m sure the Trimetric is much more accurate and easy to calibrate and has more useful features.
I do think my cheapo Ebay one is far better than having no monitor that can count amp hours out and in. Voltmeters alone are not adequate.
I do understand that more energy must be put back than is taken out due to losses so I just leave the solar panel charging after the monitor says 100%. If using generator, shore power, or a lot of solar an automatic or manual shut off would be necessary. My first set of batteries lasted one year; the second pair are working well after 8 years.