Strange result !!

[faramog]

Tried a new battery on my SSG. Started at 11.38V, rose quickly to 11.94, steady to 12.09 and then 6 hours later its 10.33 !!

What is happening ... I thought the radiant charge was supposed to increase the energy in the battery ??

During this, source went steadily from 12.54 down to 12.46

[Joit]

It is pretty normal that the Batterie first shot up
and then settle back to the Voltage where it starts to charge.
The first time it dont gets really charged, only after a while it will get capacity.

[kippered]

Many more tests are needed.

I found similar results so far with my energizer.

I am also finding it important to let the batteries rest before checking the SOC as the voltage levels change quite a bit.

[faramog]

fall back is one thing... but to fall a volt ???

[faramog]

actually rather a volt below where it started

[TanTric]

...

thats perfectly normal... the battery needs contioning to take the radiant charge, after some charges that will not happen again..

[CosmicFarmer]

I've heard its the sulphation being knocked off.
You say new battery, was it store-new? or just new as in another one laying around? 11.38 is worrysomely low for a store bought battery, I thought they should come at something like 12.4 if its "uncharged" and 12.8 if its charged, but I may be mistaken.

Basically the sulphation is a resistance, which is like throttling a flow of water through a tube, so the velocity is going to be higher. When the sulphates are knocked off, then you see the battery's true voltage, and then you can do your work.

Let it "cook" for a while longer, but there is a peak voltage that should take some time to get to. Once you find the peak, use a c20 resistor to drain the battery, (12.4??) and then charge it again. After a while, it takes less time to reach the peak, and the peak gets higher.

So you see it can occupy alot of your time to baby your batteries, so thats why the R-charge from bedini is expensive, it does it for you (so you can have a life while conditioning batteries) . You can do it yourself if you have battery monitoring software and somehow for that software to switch batteries and operate the discharge process.

[faramog]

Not store bought, but new as in new to me. I got two 90AH batteries that were lying around the hanger and my airfield. They have been heavily charged / discharges and are not all that new. In good shape though.

Time will tell

[theremart]

RE: Charging battery dropping.

If you have a battery on front that is getting low less than 12V I find the charging battery will drop as well. I have run batteries several times and if source battery gets too low it seems to steal energy from the charge battery to keep running.


Also if you leave the battery hooked up to the circuit it may also drain from the charge battery ( I am guessing leaky diode ).


Another possibility is you have a short in the charge battery if one of the cells is shorted it will drop the voltage down under 10V as well.