All solar batteries degenerate in performance and lifespan from a process called sulfation. Sulfation is a build up of an insulating layer of spongy sulfate crystals which occurs whenever a battery discharges. The live of the battery or active material become lodged in an unusable crystalline form. The process reverses whenever the batteries are charged. However since the amount of time where a battery is discharging is higher than when it is charged, over time the sulfate crystals harden and cannot return as active material even with charging.
A customer from Canada, Joseph Wong, recently sent us images of his installation of four 24V Infinitum Desulfators on his 24V solar battery bank made up of eight 12V batteries. We see here four parallel rows of two 12V batteries in series. One 24V desulfator is installed on each two 12V batteries in series.
Below is the image of the actual installation, an illustration of that installation, an example of a 48V battery bank setup with 24V Infinitum Desulfators as well as a snapshot of his comment on this article in which he mentioned that there was an apparent improvement after using the desulfators for three weeks.
Update on April 4, 2019:
Joseph sent us an image of the battery test he conducted recently. Though he did not measure the readings before the installation, you can see that the internal resistance is a low 3.94 milliohms which indicates that his batteries are in good condition with little to no sulfation buildup.
B-1: 3.90 milliohms
B-2: 4.04 milliohms
B-3: 3.70 milliohms
B-4: 3.74 milliohms
B-5: 3.78 milliohms
B-6: 4.02 milliohms
B-7: 3.96 milliohms
B-8: 3.68 milliohms
The SOH of all batteries are 100%
DOUBLE YOUR BATTERY LIFESPAN