The basic principle for most solar system efficacy relies greatly on self-utilisation meaning
using as much of the power generated by your solar system as possible. The difference
between the feed-in and consumption tariffs is what you are bound to lose if you do not add
a battery and it will only get bigger.

Solar Batteries have evolved so much since their introductory times and their cost has
reduced quite significantly. One positive technological evolution of the solar battery is the
AC coupling technology.

This means, dwellings which were fitted with a grid-connected inverter in the beginning of
solar time, can now be added batteries without the need to replace the inverter with the
so-called hybrid inverters.