A home battery allows you to store surplus solar electricity generated during the day and use it in the evening or overnight. In Switzerland, the economics depend on the spread between what your utility pays for exported electricity and what you pay to import it — a spread that has grown significantly in recent years. This article explains what batteries cost, what they realistically deliver, and how to decide whether one makes sense for your household.
What a battery does
Without a battery, a typical Swiss household self-consumes roughly 25–35 % of the solar electricity it generates. The remainder is exported to the grid at the feed-in tariff. With a properly sized battery, self-consumption rises to approximately 50–70 %, meaning more of your expensive retail electricity is replaced by your own solar production.
The financial benefit comes entirely from the difference between what you pay to import electricity (typically 22–35 Rp./kWh in Switzerland in 2026, depending on your distributor and tariff) and what you receive for exported electricity (typically 6–12 Rp./kWh under standard feed-in arrangements). The larger that spread, the stronger the battery case.
Battery costs in Switzerland (2026)
Residential lithium-ion batteries are currently priced at approximately CHF 700–1'500 per kWh of usable capacity, fully installed. A typical residential system of 5–15 kWh therefore costs:
- 5 kWh battery: approximately CHF 3'500–7'500
- 10 kWh battery: approximately CHF 7'000–15'000
- 15 kWh battery: approximately CHF 10'500–22'500
Actual prices vary with brand, chemistry, inverter integration, and installer. Request itemised quotes from at least three installers.
Battery versus no battery: a comparison
| Factor | No battery | With battery (5–15 kWh) |
|---|---|---|
| Typical self-consumption rate | 25–35 % | 50–70 % |
| Grid export rate received | 6–12 Rp./kWh | Reduced (less export) |
| Grid import avoided | Partial | Higher |
| Upfront additional cost | — | CHF 3'500–22'500 |
| Typical payback period | Not applicable | 8–15 years (residential) |
| Useful life (battery) | Not applicable | ~10–15 years |
| Complexity | Lower | Higher (BMS, monitoring) |
Payback periods of 8–15 years are typical for current Swiss conditions. The exact figure for your installation depends on your consumption profile, your utility's tariffs, and battery costs at the time of purchase. Given battery lifespans of 10–15 years, some installations will not recover their cost within the battery's first life. This does not make batteries a poor choice in all cases — see below — but it does mean the decision deserves careful analysis.
When a battery is likely to make sense
- Your retail electricity tariff is high (above 28 Rp./kWh) and your feed-in tariff is low (below 8 Rp./kWh), creating a large arbitrage spread.
- Your household consumption is concentrated in the morning and evening, leaving most solar production to go to export without a battery.
- You want a degree of grid independence during short outages (note: most standard batteries only provide backup if specifically configured for islanding — confirm this with your installer).
- You are installing a new solar system and the incremental cost of adding a battery at installation time is lower than retrofitting later.
When a battery is less likely to make sense
- Your household already self-consumes a large share of solar production naturally (working from home, daytime appliance use, EV charging during the day).
- Your electricity tariff is at the lower end of the Swiss range and your feed-in rate is comparatively generous.
- Your annual solar yield is modest (small roof, suboptimal orientation) — a smaller solar system with high self-consumption may deliver better returns than a larger system with a battery.
- You are part of, or considering joining, a self-consumption community (ZEV) that already pools solar production across multiple households. See self-consumption community (ZEV) for details.
Tips for optimising self-consumption without a battery
Before committing to a battery, explore whether self-consumption optimisation alone can close the gap. Shifting dishwasher, washing machine, and EV charging to solar production hours can raise self-consumption meaningfully with no additional hardware. See self-consumption optimisation tips for practical guidance.
Feed-in tariffs in 2026
The value of exported electricity — and therefore the cost of not storing it — depends on your distributor's current feed-in tariff. See solar feed-in tariff 2026 for current rates and how they are set.
Summary
A battery adds CHF 3'500–22'500 to a Swiss residential solar installation and raises self-consumption from roughly 30 % to 50–70 %. Current payback periods are 8–15 years, which is close to the useful life of the battery. The decision is financially marginal for many households and more compelling where the gap between retail and feed-in tariffs is large. A detailed quote and consumption analysis is the right basis for this decision.