Totally SOLAR now

During the past few months I have changed my WSPR station to being totally SOLAR powered. The old TS120S is driven by an old ACER "Aspire" 3620 laptop which is running directly from the SOLAR panel regulator off about 13 volts, so avoiding the necessity for an inverter for a 230VAC to 12 VDC Power supply unit.

The unit runs very well and without the radio noise that usually involves inverter usage.
I could probably run 24 hours but in order to save the possible damage and loss of charge cycles available to the 12 volt deep cycle battery, I am presently restricting transmissions to about 18 hours maximum, when using WSPR.