Solar battery in 2026 — we're honest with you
The residential battery is often sold as the missing piece of the solar puzzle. That’s true — in some cases. In others, you spend CHF 8 000 for 3 years of additional ROI. Here's how to tell the two apart.
The drop in prices for LFP (Lithium Iron Phosphate) batteries has been spectacular. In 2019, a 10 kWh residential battery cost CHF 16 000–22 000 installed in Switzerland. In 2026, this same type of system — or even more efficient — will be available at CHF 6 000–9 500 depending on the brand and the installer. This is a drop of more than 55% in 7 years, and it is not about to stop.
But “cheaper than before” does not mean “profitable in all cases”. And many solar salespeople ignore nuance. So let's look at the numbers honestly.
What a battery actually does
Without a battery, your solar installation produces electricity during the day. What you don't use in real time is injected into the network — sold to your DSO at the injection rate, generally CHF 0.06–0.14/kWh depending on your contract. In the evening, when your production drops to zero, you buy electricity from the network at CHF 0.28–0.32/kWh.
The battery fills this gap: it stores the day's surplus, then releases it in the evening. The gain depends on the difference between your purchase price, your GRD injection price, storage losses and the actual number of kWh cycled each year.
The profitability calculation — without disguise
Simplified calculation example: household, 8 kWp and a 10-kWh battery
CHF 7 500 divided by CHF 440 gives roughly 17 years of simple payback. This example uses assumptions and guarantees neither savings nor service life. An hourly simulation must include losses, degradation, maintenance and possible replacement. Check the product warranty and cycle conditions separately.
When the battery really makes sense
You have an electric vehicle. Charging your EV with your own solar production can greatly improve self-consumption. The correct calculation depends on your kilometers, your charging schedules, the available solar surplus and the price of the energy avoided.
Your DSO offers a very low feed-in rate. In certain Valais municipalities or on the outskirts of large cities, the resale price caps at CHF 0.05–0.07/kWh. In this case, the arbitrage gap is maximum (CHF 0.25+ per kWh stored vs sold) — each kWh stored is precious.
You have fears of load shedding. Some batteries offer a “backup” function — they allow part of your home to be powered in the event of a network outage. This is not their main use in Switzerland (excellent network reliability), but it is an insurance that some households value.
The best batteries available in Switzerland in 2026
Huawei LUNA2000
CHF 5 800–8 000Excellent value for money. Native integration with Huawei SUN2000 inverters. Very well supported in Switzerland.
Enphase IQ Battery 5P/10T
CHF 6 800–9 200AC-coupled architecture and fine panel-by-panel monitoring with the IQ ecosystem.
LG Home 8 / RESU Prime (legacy)
CHF 6 500–9 000Relevant option for households that favor domestic storage and simplified energy management.
SunPower Reserve
CHF 8 000–12 000Premium approach focused on residential autonomy and connected home integration.
Sources
NREL — Battery storage cost benchmarks 2025. BloombergNEF — Lithium-ion battery pack prices 2025. Feedback from Swissolar member installers. Huawei, Enphase, LG and SunPower 2026 product sheets.
Frequently asked questions
Is a solar battery profitable for every home?+
No. Its interest depends above all on the hourly consumption profile, the purchase price, the injection price, losses, the total price and the warranty period.
Should the battery be installed immediately?+
Not necessarily. Compare an installation without a battery, an installation ready for expansion and a battery installed from the start with the same production and consumption assumptions.
What to look for in a battery offer?+
Check the useful capacity, power, efficiency, emergency mode, warranty, after-sales service, replacement and total price.