Inhalt
kWh versus kW
kWh describes energy quantity; kW describes charging and discharge speed. A battery may hold enough energy but still be unable to supply a high load.
Use the load profile
Annual consumption is not enough. The timing of use and seasonal differences determine how much energy can actually be shifted.
Backup changes the design
Priority circuits, starting currents, phases, changeover and minimum reserve must be defined.
Rules of thumb are only a start
A solar-to-storage ratio can guide the first estimate but must be capped by real surplus and night demand.
- too small: more surplus exported
- too large: low utilisation
- well sized: regular natural cycles
Conclusion
The right size comes from data. The Voltalps calculator gives a first range; the quote checks the details.
Hinweis: Der Artikel bietet allgemeine technische Orientierung. Verbindliche Auslegung, Anschlussregeln, Förderungen und Wirtschaftlichkeit müssen projektbezogen geprüft werden.