โJul-19-2020 08:27 AM
โJul-20-2020 10:24 AM
Freeway Flyer 05 wrote:You also mention the terms "battery condition". There is an easy way to get a baseline for the batteries overall health. Take note of charge times. When a battery is in poor condition the voltage will spike when you try to charge it. That tricks the charger in to thinking the battery is fully charged. So the charge cycle happens much quicker than normal. Instead of charging for an hour like it normally did the bad battery will say its charged after a few minutes.
Easiest way to measure battery level of charge?
โJul-20-2020 06:42 AM
KD4UPL wrote:
The right way to measure the state of charge of a battery is not a voltmeter. You need a battery meter. Also known as a state of charge meter, battery gauge, etc. It involves a shunt wired into the negative battery cable to measure the current into and out of the battery over time. You program the meter with your battery capacity and the fully charged parameters and it measures current in and out and calculates the percentage state of charge. Tri-Metric is a good one. Victron makes one. Outback calls theirs the Flexnet DC. Magnum calls their the ME-BMK. Link 10 used to be one but I'm not sure they are made anymore.
As you can tell from all the previous posts, measuring just the voltage is subject to many variations. I don't know very many people who, when camping, are willing to turn off the RV, disconnect their batteries, and wait 15 minutes just to find out the SOC. A nice SOC meter with a wall mounted display is the way to go.
โJul-19-2020 06:59 PM
โJul-19-2020 06:11 PM
โJul-19-2020 04:37 PM
DiploStrat wrote:
-- Voltage gives an indication of the state of charge, but it is not reliable. Under load the voltage will be low, under charge, it will read too high.
โJul-19-2020 03:10 PM
Freeway Flyer 05 wrote:
Easiest way to measure battery level of charge?
โJul-19-2020 01:22 PM
โJul-19-2020 11:57 AM
Freeway Flyer 05 wrote:Condition, capacity or state of charge?
Easiest way to measure battery level of charge?
โJul-19-2020 11:54 AM
โJul-19-2020 09:13 AM
profdant139 wrote:
There is the right way (install a proper voltmeter), and then there is my way -- I disconnect the battery. Let it sit for 15 min. Take out my little multimeter and hook it up.
โJul-19-2020 08:47 AM
โJul-19-2020 08:42 AM
โJul-19-2020 08:34 AM
โJul-19-2020 08:32 AM