Grid-Tied with Backup - available inverters?

[greenHouse]

The Xantrex XWs' should still be available -- I've not heard they were discontinued.

However, the "Gold Standard" for battery-backed, off-grid inverters are OutBack. They don't have all the modern whistles and bells, but they are fairly bulletproof.

[WantsItAll]

I am considering retrofitting my 1982 home with a grid-tied with battery backup solar PV system. I understand that there are a limited number of appropriate hybrid inverters available, but don't know what models they are. At the Xantrax site, I couldn't even figure out which, if any, of there devices were appropriate. From one forum message I ran across, the Xantrax XW6048 has been replaced with a different model, but the writer did not identify the new model number.

I would appreciate anyone pointing me to model numbers (any manufacturer) appropriate for my application. I can then look up the specifications and prices and try to make sense of it all.

Thanks.