Hey Minnesota Oli, thanks for this!
You mean to say I don't NEED to change my inverter? Somehow I presumed i had to go w/ pure sine wave when converting.... can't explain the rationale that made me arrive at this conclusion, but this is, indeed, great news for my dusty wallet:)
@SeaDawg, these poor AGMs are badly swolen, and no longer keep a charge for >15 minutes or so. Yikes!