help newbie with charging house/solar battery
hi, trying to learn about keeping my house/solar battery in good condition. My parts. -3 renolgy 100w eclipse panels, -renolgy 40amp commander controller, lifeline 255ah batt , renolgy MT50 digita...
Forum Discussion
theoldwizard1 wrote:
It is difficult to measure battery State Of Charge just by voltage. If you want to do it accurately get a good battery charger, disconnect the battery from all load, charge according to directions. Remove the charger and let rest for about 60 minutes. Confirm SOC with hydrometer and then check voltage.
The best SOC monitors continuously monitor all current flowing in or out of a battery via a shunt. They work under the assumption you are starting with a battery at 100% SOC when they are first connected. You should probably re-calibrate every 6 to 12 months.
A Trimetric has an "auto reset" that does not work with solar. You have to turn off the auto reset or else it will reset every day at sundown when the amps go negative.
Yes, you must recharge to full (true full, not a bogus full such as Trimetric itself describes) and reset the AH counter then. This should be quite often if doing 50-90s for a period or else when on solar doing mostly 75-95s.
If you believe the % SOC on your monitor, you probably also believe in the Tooth Fairy.
