Then, too, I have seen a number of DVOM s that were correctly connected or used but were off in their readings by as much .3 volts....
Battery meter?
- Thread starter Gene Neill
- Start date
Not uncommon at all especially with the massive influx of cheap Chinese stuff we see today. I just, this past weekend, donated a DVM to my buddy's off grid cabin because we hate lugging tools in by sled.. It was one of the Harbor Freight models I threw in my basket because it was so cheap.. I was shocked to see it off by approx 0.2V at 12.73V when compared to my Fluke (which is NIST calibrated)...
It will work for what we need at the cabin, but right out of the box it is off by what equates to 20% of battery capacity...
If you already start with a 20% variation, then don't get good resting voltages, the snowball rolls and picks up snow....... Again a volt meter can be good at detecting trends, even if not 100% accurate, but they are often installed incorrectly and the real cheap ones can be pretty bad, accuracy wise...
I think ANY tool that causes the owner to pay attention to the battery bank is a good one, even if not 100% accurate.....
