I've just bought 2 units of Panasonic Envio for my house, 2HP with inverter & 1HP witout inverter, n the installation charges for an inverter unit costs more than a normal unit, also note guys, for AC with inverters it's adviced to hv thicker copper piping done (e.g8mm instead of normal 4mm), n of course it costs more!

just FYI

cheers