GEL versus AGM
I watched a video were it was suggested the max DOD of Gel Cell is 80 percent versus 50 percent of AGM and the charge time for both is around 2-3 hours. A max DOD of 80 percent would put the Gel Cell...
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Northstar AGM datapoint.
No upper limit on charging amps.
I feed my depleted 90Ah AGM battery at 40 amps, or 65 amps if I combine charging sources, or whatever it wants from a cold fast spinning alternator.
Closing in on 300 deep cycles, and deep is below 60% in my book, and add another 150 shallow cycles to ~85%.
I like a battery which can accept huge charge rates when depleted without worry. But absorption stage still takes hours.
I recently ran a test to see how long it took to get from 80% to 100% when held at 14.5v.
It took 3.5 hours to return 18 amp hours and for amps to taper to 0.4 at 14.5.
If I had accumulated 10 deep cycles without a high amp recharge, this would be 5 to 6 hours to taper to this point.
On boaters forums, the Gel battery owners are claiming the longest lives, but their entire charging system is calibrated to not exceed the gel parameters.
And no matter what the 100% recharge is still needed, and 80 to 100% is going to take hours.
This is likely my last lead acid battery for deep cycling. I got my eyes on 4 100AH Lifepo4 cells.
No upper limit on charging amps.
I feed my depleted 90Ah AGM battery at 40 amps, or 65 amps if I combine charging sources, or whatever it wants from a cold fast spinning alternator.
Closing in on 300 deep cycles, and deep is below 60% in my book, and add another 150 shallow cycles to ~85%.
I like a battery which can accept huge charge rates when depleted without worry. But absorption stage still takes hours.
I recently ran a test to see how long it took to get from 80% to 100% when held at 14.5v.
It took 3.5 hours to return 18 amp hours and for amps to taper to 0.4 at 14.5.
If I had accumulated 10 deep cycles without a high amp recharge, this would be 5 to 6 hours to taper to this point.
On boaters forums, the Gel battery owners are claiming the longest lives, but their entire charging system is calibrated to not exceed the gel parameters.
And no matter what the 100% recharge is still needed, and 80 to 100% is going to take hours.
This is likely my last lead acid battery for deep cycling. I got my eyes on 4 100AH Lifepo4 cells.
