[Elecraft] K2 - KBT2 and solar power?

[Don Wilhelm]

While Don Brown has offered an alternative to increase the voltage of 
the controller, I would not recommend doing it that way - what you end 
up with is a solar controller that is specifically modified to use with 
the K2 only.

I would want the solar controller to work with any 12 volt Lead Acid 
battery and the charger modified for this K2 use would overcharge a 
battery connected in the normal way.

If I did modify a controller to have a higher output voltage I would 
mark it in BIG BOLD letters to serve as a caution against connecting it 
directly to a battery - I know such mistakes do happen.

Don B. did say that the direct battery connection inside the K2 is the 
best method, and I fully support that.

73,
Don W3FPR

DolfinDon at msn.com wrote:
SNIP...

  The other way
> to solve the problem is to increase the controller switching point to about 
> 14.5 volts by installing a 220K resistor at R9. I have not tried this but 
> should work. The controller would plug directly into the K2 power connector 
> to charge the battery. If you use this method then the controller should not 
> be connected directly to the battery.
> 
> Thanks
> 
> Don Brown
> KD5NDB