SiO2 Battery -UPDATE 5 (Two Batts)

FWC wrote:
SiO2 has almost the same characteristics as a Gel Cell (it is a gel cell) which is about the same as an AGM or any other 'starved electrolyte' lead acid battery. The one quirk is lower freezing point of the electrolyte, but unless you need that, save a bunch of money and buy AGM batteries from a reputable manufacturer.

As for charging, the acceptance current will decrease in absorption, just like any other lead acid. SiO2 also needs to be fully recharged to prevent sulfation. Take a close look on the label of these batteries - it is stated right there:

Azimuth Solar wrote:
Caution: Recharge battery immediately after use!

Agreed it is contradictory in some of what they say. However, it is true you can leave an SiO2 for at least a month without a full recharge, which you cannot get away with using AGMs. This is from their low acid content--there is hardly anything that can sulphate by comparison.

They claim "fast recharge" too, but that turns out to be just using 25% charging rate (the rated limit) but the trick there is that it stays in Bulk until almost full, so you don't get amps tapering fom 75% SOC, so it stays at 25amps almost the whole time, which makes it "faster".

I am trying to find out why I can't apply more amps than that, but have not got an answer yet.

I have a particular application on the truck camper which SiO2 looks like the right way to go, but for most Rving I would not spend money like that! I have four Wet 6s in the MH and that can't be beat for that job. (AGMs failed there the way I do things, but Wets do ok)