Calculate what share of solar generation is used on site rather than exported.
Self-consumption and self-sufficiency are different: the first measures what happens to the solar, the second what happens to the load. A battery raises both by shifting midday surplus into the evening. Self-consumption drives the economics wherever export payments are far below retail import prices, which is now the norm.
Solar Self Consumption
Self-consumption = solar used on site ÷ total solar generated
Self-consumption = solar used on site ÷ total solar generated Self-consumption and self-sufficiency are different: the first measures what happens to the solar, the second what happens to the load. A battery raises both by shifting midday surplus into the evening.
Self-consumption drives the economics wherever export payments are far below retail import prices, which is now the norm.
This calculator takes 4 inputs: Annual solar generation, Annual electricity consumption, Share of consumption during daylight, Battery capacity. The pre-filled defaults are a realistic starting point — replace them with figures from your own environment for a result you can act on.