
Is adding a battery to solar PV worth it?
When it pays to add a battery to existing solar: the gap between feed-in and purchase price, consumption profile, inverter type and battery lifetime.
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How to size a battery, when it pays off, what energy sharing means for apartment buildings and how subsidies work. Written from design and installation practice.

When it pays to add a battery to existing solar: the gap between feed-in and purchase price, consumption profile, inverter type and battery lifetime.

How to choose home battery capacity: evening and night consumption, PV output, winter vs. summer, backup during outages and battery power in kW.

How a company battery (BESS) shaves consumption peaks, helps lower reserved capacity and when it pays off. What 15-minute load data shows.

How sharing PV electricity in an apartment building works via EDC: meters, suppliers, allocation, the role of a battery and what the owners' meeting must approve.

An overview of subsidies for a solar battery in 2026 for family houses, businesses and apartment buildings, and the most common mistakes that cost applicants the support.
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