What this changes for your decision
Measurement rates, reserve costs, solidarity costs and dynamic rates become visible decision lines. This guide shows the elements to check in the quote and contract.
For your project, the item “compatibility” should be explained in terms of the building, consumption, grid connection and contract. Ask for the source, date and, for calculated values, the method used.
For your project: Confirm compatibility of exact inverter, battery, charger and EMS models. Check local control, interfaces, cloud dependence and the effects of changing provider.
Three checks before signing
1. Load curve
Use quarter-hourly or hourly data to justify controllable capacity and uses.
2. Compatibility
Check inverter, EMS, battery, terminal, backup function and cloud dependency together.
3. Life cycle
Compare price, losses, warranty, degradation, replacement and service over the entire duration of use.
References for “EMS” for your project
- ElCom, pricing structures 2026: Measurement rates, reserve costs, solidarity costs and dynamic rates become visible decision lines.
- Swissolar, Swiss Battery Monitor 2026: The 2026 monitor lists 1,5 GWh of behind-the-meter storage, 135 MWh of network storage and 4,2 GWh of network projects planned by 2030.
Note the date of consultation and the scope of each source. National information does not replace or local rate or technical validation of your project.
Compare quotes on a solid basis
Ask for a reference variant and a conservative variant. Each must separate investment, self-consumption, injection, aid, schedule and responsibilities. You will see if the result holds with a less favorable hypothesis.
For the item “compatibility”, the quote should state the data to confirm before work starts, who will check it and how changes will be handled.
Your next step
Prepare utility bill, roof information, existing contracts and comparable quotes. Answer in writing to open questions, then compare net price, annual profit and contractual consequences.