1. Identify the proposed service
The SFOE describes the reserve as protection against critical shortages, using several reserve resources. Swissgrid requires providers to prequalify and enter a framework agreement for the relevant ancillary services. Ask the aggregator which market it serves and its contractual role. Do not confuse these arrangements with storing home solar surplus.
2. Confirm eligible equipment
Obtain written confirmation of accepted models, software, meter, connection and procedures. Specify who performs integration and testing. An API or app does not establish a battery’s admission to the service. Confirm availability dates and conditions before including revenue in a solar quotation.
3. Allocate power and energy
Distinguish available power in kW, usable energy in kWh and activation duration. Simulate repeated requests and periods with a low state of charge. Compare limits with self-consumption and backup needs. One uniform charge threshold does not guarantee backup duration; circuits, loads and the installed system determine it.
4. Calculate net revenue
Request the payment method, guaranteed or variable share, fees and responsibilities. Include losses, purchased energy, wear and foregone feed-in revenue. Check that the model warranty permits the planned use. A commercial annual estimate is not guaranteed income and does not make the battery cost-free.
5. Define control, data and exit terms
Specify remote access, transmitted data, personal reserve, control override and behaviour without connectivity. Check duration, price changes, termination and withdrawal from the service. Keep project grants separate from contract remuneration: a VPP offer does not establish a subsidy for your battery.