I have had the Flexmax 80 for over 3 years now and not a single issue. I have a 24v battery bank and 1100 watts of solar in an off grid house. One great advantage is that it has the option to have the backlight on the display to stay on. The controller is in a dark storage room so it makes it easy to see without having to hit a button for it to come on. Great product, very well made.

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