ST Series
The Sun Tie inverter is specifically manufactured for solar electric utility interactive applications. Use in utility-intertie residential systems that utilize solar electric panels, but do not have a battery bank.  This inverter's all-in-one design promotes an easy-to-use interface which can be placed indoors or outdoors.

The Sun-Tie series is flexible; it is compatible with both crystalline and thin-film photovoltaic modules, and multiple Sun Tie inverters can be connected to the utility grid to provide for additional generating capacity. Valuable 'maximum power point tracking' (MPPT) charge control software is included in the inverter, which aids in converting lost voltage into additional charging current. Rated average efficiency is 90% (peak efficiency 94%). 2-year warranty.

Xantrex STXR2500 2.5 kva, 42-85 vdc input, 240 vac 60 Hz output 
$ 2759*
list price