Gel batteries
Hi. I have acquired two used 135ah 12v gel batteries. They are 5”x18”. They were back batteries that were changed out after a years service. I think they really have no usage. My question is how...
Forum Discussion
Sound advice, LY
The rest voltage decay is by far the most important value that cannot be mismatched. But the decay should be measured after 10-days rest after being fully charged.
There are significant differences between a UPS model and automotive style AGM battery. Thicker mats, a significant percentage of calcium in both the positive and negative plates, and intercell connectors that are much less massive.
How does a person reconcile the charge needs between AGM and 2-3/4ths % antimony? They don't. And holding an AGM above 14.4 volts temp compensated for hours on end repeatedly is not feasible.
The batteries are going to constantly feud. Hatfields & McCoys.
Best choice is to rid the flooded batteries and pair automotive AGM with the Telecomms.
Not good sense to damage batteries needlessly. Flooded will draw the Telecomm batteries down almost immediately after cessation of charge and I believe forum members remember what happens to AGM batteries that never get fully recharged. This is one example where reality trumps E=MC2. I've done it and have seen the effects. If someone tried to give me a battery bank half flooded and half AGM I would not parallel them on a bet. The degradation is neither slow not subtle.
The rest voltage decay is by far the most important value that cannot be mismatched. But the decay should be measured after 10-days rest after being fully charged.
There are significant differences between a UPS model and automotive style AGM battery. Thicker mats, a significant percentage of calcium in both the positive and negative plates, and intercell connectors that are much less massive.
How does a person reconcile the charge needs between AGM and 2-3/4ths % antimony? They don't. And holding an AGM above 14.4 volts temp compensated for hours on end repeatedly is not feasible.
The batteries are going to constantly feud. Hatfields & McCoys.
Best choice is to rid the flooded batteries and pair automotive AGM with the Telecomms.
Not good sense to damage batteries needlessly. Flooded will draw the Telecomm batteries down almost immediately after cessation of charge and I believe forum members remember what happens to AGM batteries that never get fully recharged. This is one example where reality trumps E=MC2. I've done it and have seen the effects. If someone tried to give me a battery bank half flooded and half AGM I would not parallel them on a bet. The degradation is neither slow not subtle.
