No. The timing of use and the value or treatment of surplus energy affect the financial outcome.
Self-consumption refers to using solar energy at the property where it is generated. It is a useful concept when discussing how the timing of electricity use relates to the proposed installation.
Look at the daily pattern
An office occupied during daylight may use generation differently from a home with most activity in the evening. Identify loads that normally operate while solar is available. Moving a flexible task to daytime may be practical, but the change should fit the customer’s routine.
Keep measurement and assumptions separate
Ask whether the installation measures consumption and grid flows or only solar generation. This affects which conclusions can be drawn from the monitoring display. Any storage or grid arrangement should be explained separately, with the relevant project-specific conditions.
Distinguish solar used on site from total generation
Illustrative example: if an installation generates 20 kWh during a period and 12 kWh is used directly on site, the direct self-consumption share is 60% for that example. The remaining energy needs a defined route, such as storage, permitted export or output limitation. Ask how the monitoring system measures these flows and avoid treating total generation as identical to purchased electricity avoided.
Your practical checklist
- Map demand across the day
- Identify genuinely flexible tasks
- Ask what the monitoring system measures directly
Does producing more energy always increase savings proportionally?
No. The timing of use and the value or treatment of surplus energy affect the financial outcome.
Further reading: U.S. Department of Energy on storage energy and power capacity.
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