Yes, definetely : the source battery always has to be of a greater voltage (even if it is slightly) compared to the charging battery, in order to be able to fill it up.
Just take care that the charging tension tends to fall down rapidly once disconnected (you can check that by leaving a multitester's probes attached for a moment): that's why, for example, a 9v battery should be charged around 10.5-11v.
Anyway, the more you'll charge a battery, the more it should become responsive to a radiant charge (that's called : conditionning, and it's a know fact among such system's users).
Lots of observations still to do to understand and try to "master" your system, but that's a good start. Congrats.
Just take care that the charging tension tends to fall down rapidly once disconnected (you can check that by leaving a multitester's probes attached for a moment): that's why, for example, a 9v battery should be charged around 10.5-11v.
Anyway, the more you'll charge a battery, the more it should become responsive to a radiant charge (that's called : conditionning, and it's a know fact among such system's users).
Lots of observations still to do to understand and try to "master" your system, but that's a good start. Congrats.

I'm using single diodes and 4 diodes on terminal blocks so I can easily connect/disconnect different ways of collecting the output from the machines, so last night I was using a single diode configuration but with 2 of them on the terminal block configured to be connected to a tri-filar coil, so connected to this bi-filar fan there were 2 spare wires dangling there which I assumed would be ok. Well, within 2 minutes the wire coming from the negative terminal of the charging battery made contact with the transistor emitter. The fan kept on going, but smoke started coming from the wires. The wire that made the actual contact with the emitter burnt and the plastic on the end melted up into a big bubble, all the other wires melted together and had to be torn apart. The solder even came loose from the crocodile clip going to the source battery's positive. It was HOT
, i have two 12V batteries, unless i use the solar panel.
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