Surplus solar to the grid
12:00 · 10% cloud coverAdjust the inputs
Home demand
Home essentials use 0.60 kW
Power balance
Power balancedSurplus solar to the grid
Solar serves the home, then the battery, then the grid
to see what it means
About this simulation
This is one instant in a simplified, grid-connected system
Moving time changes the sunlight; it does not simulate a whole day's battery history — battery level is a separate input
The moving dots show direction, not elapsed time
Assumptions: a 6 kW array, a smooth daylight curve from 06:00 to 18:00, a 5 kWh battery with a 2.5 kW charge/discharge limit, and no conversion losses
Cloud cover reduces the illustrative curve; it is not a weather forecast — appliance values are example loads, held constant at the selected instant
Home demand comes first; excess solar charges the battery, then exports to the grid
The battery supplies a shortfall before grid power is imported; a full battery cannot charge and an empty one cannot supply power
Background: Solar and storage basics — US Department of Energy