Battery Voltage Monitor
Built this little battery monitor a while back. I picked up the readout at a flea market for $4 and mounted it in a small box. The switch on the side turns the display on/off. Sure makes for a quick ...
Forum Discussion
At the risk of sounding like I'm nit-picking, it's important to distinguish between 'digits' and 'places'. Digits simply refer to how many numbers appear on the display; which could be hundreds, tens, tenths, hundredths, etc.
A 'four digit meter', for example, may give you voltage to 4 digits, but only to within one tenth of a volt, while another 'four digit meter' may give you voltage to within 1000th of a volt:
999.9v vs. 9.999v ... both are four digit meters, but the decimal >> place << is what really matters.
For truly useful battery voltage monitoring, one requires a four digit "two (decimal) place" meter:
99.99v
A difference of only 00.09v can be the difference between 60% soc and 52% soc. And on a rather large bank, a difference of 50 or 60 Amp Hours.
The link Pnichols posted is a good example of a four digit, two place meter.
A 'four digit meter', for example, may give you voltage to 4 digits, but only to within one tenth of a volt, while another 'four digit meter' may give you voltage to within 1000th of a volt:
999.9v vs. 9.999v ... both are four digit meters, but the decimal >> place << is what really matters.
For truly useful battery voltage monitoring, one requires a four digit "two (decimal) place" meter:
99.99v
A difference of only 00.09v can be the difference between 60% soc and 52% soc. And on a rather large bank, a difference of 50 or 60 Amp Hours.
The link Pnichols posted is a good example of a four digit, two place meter.
