Shyboy, your assumption that a starter system contains "no batteries" is false. A solar electric "system" consists of, 1) a solar panel 2) a charge controller 3) a battery. This is all Direct current (DC). If you wish to power something in your grid connected home you will need to convert this DC into AC (alternating current). This is done via an 4) inverter. In Belize, we cannot, at this time, connect this to the grid's meter. This is a simplistic explanation. There are solar panels with inverters attached that do produce AC electric, intended to go right back into the grid via the meter. The humans have not yet invented a way to store AC power. It must be consumed or lost immediately upon production. The ONLY way to store electrical energy is in the form of chemical/electrical device. The DC battery.