My solar and the chassis batteries
Outside of Quartzsite boondocking for the last month. Very happy with the solar but have one last question i thought id throw out to the group. I can hear that Aux Start relay kicking in. Im thinki...
Forum Discussion
MrWizard wrote:
You don't start the equalize voltage from a partial SOC
You don't do it, unless the batteries are already fully charged
x2
I am surprised 40 or 50 xantrax amps can actually get the 2? GC-2 depleted batteries to 16 volts in what 'appears' to be within an hour or 2 time frame.
My single 90AH AGM battery when depleted can take 40 amps for 30 minutes before absorption voltage is hit. It then requires a minimum of 3.5 hours before amps taper to ~0.35a at 14.7v which is generally considered fully charged.
The battery needs to be held at absorption voltage for a period of time before pushing it to 16v for an EQ cycle.
Sounds like the batteries are really on their last legs, and new ones are in your future, but the new ones will not appreciate being pushed past 14.8v when less than fully charged either.
The hydrometer will reveal a lot, so would an ammeter. Voltage readings alone without knowing how many amps at that electrical pressure, are flowing, can be very confusing and not indicate much at all.
