Co-Power Energy GmbH | Herzog-Heinrich-Straße 18 | 80336 München
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Partial feed-in combines self-consumption and grid feed-in of PV electricity — ideal for companies that want to reduce energy costs while monetizing surplus solar power.
Partial feed-in describes an operating model for photovoltaic systems in which part of the generated electricity is consumed directly on site while the remaining portion is fed into the public power grid. In practice, it is the most common model for commercial and industrial PV systems with self-consumption.
Photovoltaic systems generate electricity during the day, which is ideally consumed directly by the connected building — for example by machinery, lighting, cooling systems, or charging infrastructure.
If more electricity is generated than currently needed, the excess energy is fed into the public grid and compensated according to the applicable remuneration schemes (e.g. EEG feed-in tariff or market premium).
Conversely, when electricity demand occurs outside PV generation periods, electricity is drawn from the grid.
• Companies with simultaneous PV generation and electricity demand on site
• Combination with Battery Energy Storage Systems (BESS) to increase self-consumption
• On-site PPA models combining self-consumption and grid feed-in
• Commercial real estate with tenant structures (e.g. partial supply + grid supply)
• PV systems from 30 kWp upward with standard metering concepts (e.g. bidirectional meters)
• Self-consumption rate (%): share of PV electricity used directly on site
• Feed-in tariff (ct/kWh): compensation for surplus electricity fed into the grid
• PV generation (kWh): total energy produced per year
• Load profile matching: degree of overlap between electricity generation and consumption
• Economic factor: electricity purchase price compared to feed-in tariff
Partial feed-in is an efficient and flexible operating model for companies with photovoltaic systems. It combines cost savings through self-consumption with predictable revenue from surplus electricity fed into the grid.
In combination with battery storage systems and energy management systems, the economic benefits can be further increased — particularly when electricity purchase prices are high.
