How do I power my Elecraft K1 or K2 using solar power?
Most who use the K1 or K2 with solar power install a power jack on the unused Xverter hole in the back panel. Run a fused red lead to the positive internal battery lead and run the ground/black lead to the battery negative. Attach a charge controller (SunGuard4 available from CTSolar is ideal here) to this direct battery jack. Never attach a solar panel to the power input to the standard power input jack as this will likely harm the unit’s charging circuit which (unlike solar charge controllers) is not set up for the full sun voltages generated by solar panels.
