"Len Krauss" wrote in message
...
From what I gather a microwave oven operates much more efficiently (less
power, faster cooking) running on pure sine wave.

Probably, but a microwave runs so little that efficiency is not likely much
of an issue.

I understand there are
also some other types devices that either require or benefit from pure
sine
wave power.

True. Some TVs, VCRs, DVDs, etc run better off of pure sinewave. In my case
none of these devices seem to care so my modified sinewave inverter is fine.

In view of the premium price of pure sine wave inverters, I was
wondering if it's worth it or even necessary.

Try a modified sinewave inverter and see how it works. Only switch to
a true sinewave unit if you have problems.

For instance, if it used say
25% less battery capacity that would be important.

I'm not sure that effeciency is the question. Some devices do not run as
well
on modified sinewave. For example, my microwave does run cooler so has
to run a bit longer. Other than that, I don;t notice any larger draw for any
given device.

Can anyone comment on
this and other considerations for selecting a pure vs. modified since wave
inverter for onboard use?

Use a pure sinewave unit if any of the devices you are trying to drive have
problems with a modified sinewave unit. I wouldn;t be too concerned about
efficency.

Thanks,
Len Krauss


--
Eliminate "ns" for email address.