On Fri, 18 Feb 2011 06:37:39 -0800, Glenn Lyford wrote:
On Mon, 14 Feb 2011 19:26:55 -0600, Ignoramus14196 wrote:
I have a laptop and sometimes I forget to turn off the inverter for it.
If I had extra capacity, I would be better off with that.

Would you be better of building a DC-DC converter for the laptop instead
of running DC-high voltage AC only to transform it back to low voltage
and rectify it again? If your charger uses a proprietary connector
instead of the typical barrel setup (or a "smart" battery minder) maybe
you could find a spare charger and hack it to accept 14.4V input...?

While it would be less convenient (building a new converter every time
you get a new laptop that takes a different voltage) I can't help but
think it would be at least a little bit more efficient...

Here's a source for the necessary connectors and parts ...
http://www.powerstream.com/ADC.htm ... just find your
laptop on the list, get the corresponding converter, and
then you can cut it up for the parts and connector to build
your own converter.

--
jiw