I am planing to have six kW of power system with batteries to compensate the house need in peak hrs. Wherever do I would like to position The web meter to minimise the grid Electrical power. Also I could utilize the battery power at nighttime?What number of 100 Amph batteries( https://solarinstallationwesternaustralia.health.blog/2024/09/19/exploring-the-benefits-of-a-30kw-solar-system-for-large-properties-in-wa/