Understanding Self-Consumption Percentage
How we calculate. Self-consumption % = site-used generation ÷ site generation × 100. The form uses the same arithmetic as the worked examples on this page. See our methodology and accuracy policy.
Real-world scenario: A typical Self-Consumption Percentage case uses on-site consumed (mwh) 420 and on-site generated (mwh) 600. Enter the same figures below to reproduce the worked path.
What is Self-Consumption Percentage?
A behind-the-meter / prosumer KPI for PV and CHP. Distinct from renewable share (mix of total energy) and curtailment (unused potential).
- Same meter boundary
- Consumed = generation used on site
- Generated = gross or AC per policy—label it
The Formula
Worked Example
Common Use Cases
- Solar C&I reviews: export vs self-use
- Battery pairing: raise self-consumption
- Tariff analysis: on-site use share
Pro Tips
- Separate self-sufficiency (load covered)
- Freeze AC vs DC generation basis
- Don’t confuse with renewable share %
Limitations: Self-Consumption Percentage results are educational energy and utilities planning aids—not engineering, grid-operations, or investment advice. Confirm definitions with your ISO/RTO, plant, and regulatory reporting standards.
FAQ
Same as renewable share?
No. Renewable share is renewable÷total mix. Self-consumption is how much of site generation was used on site.
What if generated MWh is 0?
Self-consumption is undefined—enter positive on-site generation.
Authoritative References
For power system and plant performance concepts, consult: