Technical explanation
The natural production/consumption overlap is 20–35% without adaptation. With EMS and shift in usage to 10h–16h: 40–55%. With 10 kWh battery: 60–80%.
Definition · Finance & ROI
Self-consumptionDirectly use electricity produced on site
TL;DR
Each self-consumed kWh is worth 3–4x more than a kWh injected into the Swiss grid. Without battery: 25–40%. With battery: 60–80%. Maximizing self-consumption is the main lever for profitability of a Swiss solar installation.
Definition
Photovoltaic self-consumption refers to the direct use, on site, of the solar electricity produced. It values each kWh at the purchase rate (CHF 0.20–0.30) vs. the injection rate (CHF 0.07–0.10).
☀️
Without battery
25–40%
🧠
With EMS
40–55%
🔋
With battery 10 kWh
60–80%
💰
Value vs injection
3–4x
Swiss context
The purchase/injection price difference (factor 3–4x) fully justifies battery and EMS investment to maximize self-consumption.
Related terms
Related guides
FAQs — Self-consumption
How to maximize self-consumption without a battery?+
Program energy-consuming appliances (washing machine, dishwasher, water heater) to 10h–16h. With EMS, the shift is automatic. Gain: +10–20% self-consumption.
Is self-consumption compulsory?+
No, you can inject all the excess. But it is financially sub-optimal given the purchase/injection price gap in Switzerland.
Sources & method
Check equipment values in the offered model’s datasheet and warranty terms. Confirm grant, permit and connection requirements with the responsible programme, municipality and grid operator.
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