Wend, PV= photovoltaic, (panels) aka solar panels which you already have 
If you are looking at batteries, be very sure to make certain the systems you are being quoted on are able to run as a backup when the grid is down, ie, as stand-alone, many of them can’t. Also be sure they can deliver enough power to run what you want to run, as some of them have very low rates of power delivery.
AGL is one of the dirty big 3 polluters in the energy industry, despite the greenwashing campaigns you may have seen lately.
My power supplier has been myself since 1991, off-grid solar and a bit of wind power 
