Dc battery monitor full#
Making Sense of Battery Status Percentagesĭeep cycle batteries just don’t go from full charge 100% at 12V to 0% charge at 0V, giving off a consistent rate of discharge in an even amount of time. To any new user of solar batteries, this learning curve is all too common, as is the familiar panic that you’ve hooked up something wrong when the jolting sound of your low voltage alarm goes off - believe me, we’ve been there. And we’ve all likely driven that car in which the first half of the tank seems to last forever, but the final quarter evaporates in an instant - leaving us desperately searching for a gas station. So before we go any further, ask yourself this, “Does the gas tank in my vehicle always go from full to empty at the same rate through each quarter of a tank? In my experience, gas gauges are only accurate at two points: full and empty. When we see our battery status go from 100% to 80% over 2 hours of use, we might expect to have 8 more hours at the same usage rate, but that’s not the way deep cycle batteries work, nor how they discharge.
Dc battery monitor movie#
The percentage charge and the voltage status don’t seem to line up in the way that we expect, sometimes cutting off the movie right at the best part. They simply needed to get some real-life experience with their system and battery so they could align their expectations with their experiences.
No, they hadn’t done anything wrong with their installation, nor with their choice of appliances or equipment. Within their first night, they uncovered a disconnect between what they expected and what they got. They had done all the calculations, ordered the solar equipment, and even completed phase 1 of their solar upgrade. This plea for understanding came to us in an email a few weeks ago from some friends who had just taken their (new to them) van out on the road for the very first time. Why did it go down so quickly, did we do something wrong?” Then 30 minutes later, the inverter gave us the low voltage alarm, and everything kicked off. Then we used our appliances for a couple of hours, ran the lights, watched a movie, and the battery was at 13.2, which read 90%. “We charged up our Lithium battery to 14.2V, and the percentage of charge read 100%.
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