Understand your data
How MiBa Solar calculates self-sufficiency
Self-sufficiency is the share of consumption supplied without grid import. Accumulated-energy views can optionally apply a saved export-credit multiplier.
The formula
A result of 80% means four-fifths of the measured consumption was supplied without importing it from the grid for the represented instant or period. It does not say how much solar energy was exported or how efficiently a battery operated.
Live and daily values answer different questions
- Live
- Uses the latest load power and grid-import power. It is labeled as a latest reading and can change quickly.
- Today or calendar date
- Uses station-local daily consumption, grid-import, and, when export credit is enabled, grid-export energy. It describes the selected day rather than one moment.
Optional export credit for accumulated energy
In Settings, enter the utility import price and export-credit price. MiBa Solar derives the return multiplier as export price divided by import price; for example, 9.27 ÷ 15.38 produces about 0.602731. Leave both rates blank to keep the standard self-sufficiency formula.
The preference changes self-sufficiency on Dashboard Today/date and the Energy Performance report. Reported Grid import and Grid export totals remain measured source values. Dashboard Live is not adjusted because it represents instantaneous power, and public share dashboards do not receive the private setting.
Examples
- Consumption 5 kW, import 1 kW
- (5 − 1) ÷ 5 = 80% self-sufficiency.
- Consumption 10 kWh, import 0 kWh
- Zero is a valid measured import, so the result is 100%.
- Consumption missing
- The required input is unavailable, so the result is Cannot calculate rather than 0%.
- Consumption 0
- The denominator is zero, so the ratio is undefined and MiBa Solar shows Cannot calculate.
- Report with 0.5 multiplier
- 10 kWh import and 4 kWh export produce 8 kWh adjusted grid dependency before the report ratio.
Compare the card accurately
- Use the same view, period, station, and units.
- Check that both source values are complete and from compatible timestamps or date boundaries.
- Do not compare a Live power ratio with a full-day energy ratio as though they represented the same interval.
- Treat a value derived from partial source data as unavailable rather than estimating the missing input.