Posted by John T on April 21, 2014 at 05:02:45 from (216.249.72.121):
In Reply to: Amps and volts posted by Notjustair on April 20, 2014 at 18:08:30:
Id guess they changed cuz a Voltmeter is easier and cheaper. An ammeter registers the direction and flow of current while a Voltmeter registers the Voltage or Electromotive Force (EMF) across say the battery terminals. BOTH provide good diagnostic information. I have BOTH in my RV, the ammeter shows how many amps are being pumped into my battery bank for charging or out of it when discharging. The Voltmeter keeps me abreast of the state of charge in my battery bank. Actually I watch it more then the ammeter if Im dry camping and running strictly off my battery bank. When my solar panels are pumping and my charge controller is regulating I may settle in at say 13.8 volts while at night it may drop down to 12.6 or 12.4 etc subject to lights and the furnace and water pump use. HOWEVER if it ever dropped to 12 volts (which it doesnt since I now have 4 golf cart batteries and 460 amp hrs of storage) Id be thinking about firing up my Genset so the Xantrex Truecharge2 Smart Battery Charger can replenish my batteries.
VOLTMETER MAY BE CHEAPER WHILE BOTH SERVE A DIFFERENT PURPOSE
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