Solar self consumption is the practice of using solar energy generated on-site rather than exporting it to the grid. This strategy maximizes the value of solar production by reducing reliance on grid electricity, particularly during peak generation hours. Self consumption rates typically range from 30% to 80% depending on system size, household load patterns, and geographic location.
Technical Details
Self consumption effectiveness depends on matching solar generation timing with household electricity demand. Without battery storage, self consumption peaks during midday hours when both solar output and some household loads coincide. Systems with 5 kW to 10 kW capacity serving average residential loads achieve 40% to 60% self consumption rates. Net metering policies and time-of-use rates significantly influence self consumption economics in different regions.
Practical Significance
Higher self consumption reduces electricity bills and decreases grid interaction costs. Homeowners benefit from avoiding lower export rates while purchasing grid power at higher rates during evening hours. Adding battery storage increases self consumption to 70% to 90%, improving overall system economics and energy independence.