OK now!
Here's some fresh info. I found a cousin that is an railway company employee, and lives at the other end of my country. My father connected me with the guy, so he explained me something more about NiCd bat's.
At first, I would like to put some numbers in this.I just turned off my charger, and disconnected it from batteries.
Then I picked up multymeter, and here is what I get:
Total voltage of 7 cells = 9.65 V
One cell voltage = 1.37 to 1.40 V
When I connect a car cigarette lighter to the battery bank ( only large-amperage device I had near), I got voltage drop from 9.65 to 9.45 V. Since I don't know the current in A, it's not a very worthy information.
Now, I plan to get four (4) more cells, so the voltage vould be 1.375 ( average cell voltage) x 10 = 13,75 Volts.
Now, about the cousin's experience. Although I spent many hours of investigating and building different kinds of charge regulators, now that's all useless. He told me that at the train wagons, the batteries are allways connected to the generator, without the regulator of any kind. He told me to simply connect the wind genny and the solar panels to it, and not to be affraid for the batts.
As he also said, it is not bad if the battery voltage drops to allmost zero, because I can then charge them to full, without loosing thew capacity.
For the charging, he told me that I can charge them with 100 Amps for 2.4 hour, or 1 Amp for 240 hours, or any other relation, as it does not matter at all.
It was too nice to listen to be true, but he is in that business for 20 years.
So, few meters of thick wire, and show must go on.
Sorry for possible language mistakes, but I'm only trying to be good in English.