This unit was purchased for a remote cabin. I needed a simple, concise way to communicate when the generator needed to be started, for those people that could care less about running the batteries down too far. The meter draws so little power it can be left on the entire time cabin is inhabited, and is mounted at eye level next to the door. 10-100%, with color coded LEDs. It doesn't get any more simple than that.

While I would have been happier with a digital volt meter, the cabin is inhabited by people that mostly don't care, (because they didn't pay for the yellow-top batteries) and just want the lights to work. This meter is perfect for that, and conveys the information in the simplest way possible.

The only instructions given are "When it hits red, start the generator. It'll jump to 100% immediately. That means the battery is charging. When the generator runs out of gas, [2 hours later..it's got a small gas tank] you're charged."

It doesn't get any simpler than that.

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