FAQ Battery and solar storage in Switzerland

Not automatically. Calculate the additional electricity actually consumed after losses, avoided purchases and forgone export income. Deduct investment, maintenance and replacement. Backup power has a separate practical value and requires a compatible system. Compare several scenarios instead of assuming a fixed payback period.

Size usable capacity and power against available PV surplus and hourly consumption by season. Annual consumption alone is insufficient. Compare smaller and larger storage, losses, backup reserve and expansion options approved for the exact battery and inverter models.

Chemistry is one part of the choice and does not replace assessment of the complete system. Check the exact model's datasheet for chemistry, usable capacity, protection, location, temperature and energy-throughput or cycle warranty. Generations within a brand can differ. Both LFP and NMC systems have risks that a compliant installation must control.

Request installed prices for the same usable capacity and power. Separate battery, any inverter, protections, electrical panel upgrades, installation, backup, configuration and VAT. Hardware-only offers are not comparable to complete systems. Check availability, compatibility and warranty before budgeting the cost.

No. Confirm compatibility of the complete system: battery, inverter, switching device, protection and powered circuits. Ask about continuous and starting power, phases, reserve and switching time. Backup mode must be installed and tested; a product family name does not prove every configuration is suitable.

It can shift loads into production hours if appliances and controls are compatible. The benefit depends on hourly demand, comfort constraints, tariffs and settings. Check interfaces, cloud dependence and offline operation. Measure the result after commissioning instead of assuming a fixed gain.