Energy Simulatoran initiative of WVE, the Netherlands
Free · no account · nothing stored

Is a home battery worth it in Austria?

Austrian households pay around 25 – 30 cents per kWh and receive a market-based feed-in price for exports, often below 10 cents. Energy communities add another option. Run the numbers with Austrian starting values.

35,040 steps per year Your own tariff Battery size advice Runs in your browser
Start simulatingFor suppliers and installers
A summer day from your own scenario, replayed in 24 seconds.06:00
Austria

Typical values for Austria

Starting values only. Your bill is the source of truth: enter your own import and export price in the simulator above.

Typical import price€ 0.24 – 0.30 per kWh all-in
ExportMarket-based feed-in, roughly € 0.05 – 0.10 per kWh (OeMAG or supplier)
Solar yieldabout 1,000 – 1,200 kWh per kWp per year
Battery pricesabout € 600 – 900 per usable kWh installed
Questions

Good to know

Is there VAT on small solar systems?

Small systems have been VAT-exempt since 2024. Enter your actual cost per kWp.

What about energy communities?

Sharing within an Erneuerbare-Energie-Gemeinschaft is not modelled here. WVE builds energy sharing software in the Netherlands; contact us if you want it for Austria.

Which size?

For 4,000 kWh and 5 kWp, 5 – 7.5 kWh covers most evenings. See the size table.

Other countries: NetherlandsGermanyBelgiumUnited KingdomIrelandFranceSpainItalySwitzerlandAustraliaUnited StatesSouth Africa all countries

The simulator

Your building, your prices

Change anything. Results update instantly. Pick a country for typical starting values, then type your own tariff from your bill.

Inputs

Sets currency, solar yield and typical prices. Everything stays editable.
From your yearly bill. Households 2,000–6,000 kWh; a small business often 10,000+.
10 panels ≈ 4 kWp. Already have panels? Enter what is on the roof.
Usable size. Power is assumed at half the capacity per hour (5 kWh → 2.5 kW).
€
€
you pay (all-in)you get for export
Net metering: exported kWh are subtracted from imported kWh over the year at the price you pay. Then a battery adds little. Many countries are phasing this out.
Advanced: yield and investment costs
Netherlands/Germany ≈ 950–1,050; Spain, Australia, southern US ≈ 1,400–1,700.
Installed, including inverter and labour. Used only for payback.
Today, grid only
€ 1,050
electricity per year
With solar
€ 455
saves € 595 per year
Solar + battery
€ 181
battery adds € 274 per year
Self-sufficient
68%
of your use from your own roof
Solar used at home
63%
rest is exported
Payback solar
7.6 yr
€ 4,400 invested
Payback battery
11.6 yr
€ 3,000 invested
Imported from the grid
3,500 kWh
Imported with solar
2,350 kWh
Imported with solar + battery
1,120 kWh
solar consumption battery charge from the grid

Which battery size pays off?

Same roof and prices, only the battery changes. Bigger is not always better: once the battery covers your evenings, extra kWh sit idle.

BatteryBattery saving / yrSelf-sufficientCycles / yrPayback
How it works

A whole year, every quarter of an hour

Every 15 minutes the simulator decides where each kilowatt-hour goes. Solar covers your use first, the surplus charges the battery, the battery covers your evening, the rest goes to or comes from the grid.

Sun Solar roofkWp × yield Your homeconsumption profile Battery0.5C · 90% round trip Gridyour two prices sunlight used directly surplus charges evening export import
Step 1

Your consumption

Your yearly kWh is spread over 365 days using a daily pattern for your profile: evening peaks for a home, daytime use for a business, more in winter than in summer.

Step 2

Your solar roof

Your panels produce a bell curve each day, long in summer and short in winter, scaled to the yield per kWp for your region. Nothing at night.

Step 3

The battery decides

Every 15 minutes: solar covers your use first, the surplus charges the battery, the battery covers your evening, the rest is exported or imported. With 90% round-trip efficiency.

Assumptions and limits

Honest numbers, not a sales pitch

What we assume

  • Battery usable between 10% and 100%, power 0.5 × capacity, 90% round trip.
  • Solar shape for mid-latitudes; your yield per kWp sets the total.
  • Prices stay flat over the years; no inflation, no degradation, no subsidies.
  • Payback = investment ÷ yearly saving, before interest.

What it does not do

  • No dynamic hourly prices or time-of-use tariffs yet.
  • No electric car, heat pump or grid services (peak shaving, trading).
  • No taxes, levies or feed-in rules beyond the two prices you enter and the export rule.
  • Standard profiles, not your smart-meter data.

What makes it accurate for you

  • Use the all-in price you really pay per kWh, from your bill.
  • Use the export price your supplier really pays.
  • For a quote, ask an installer to check roof orientation and shading.
  • Want it on your own measured data? See below.
For energy suppliers, installers and platforms

Put this engine in your own app

The same calculation runs on real smart-meter data in the WVE customer portal in the Netherlands: a virtual battery that follows a customer's measured 15-minute consumption for a month, with notifications and a report. Suppliers and installers can licence the engine for their own app, their own data and their own customers.

  • Rule-based, explainable calculations with visible assumptions. No black box.
  • Runs on your side as a module, or as an API hosted by us.
  • White-label: your brand, your currency, your tariffs, your languages.
  • Proven in production with Dutch households since 2026.

Free option: put the simulator on your own website in two minutes. Pricing for the engine starts with a pilot; software licence from € 995 per month including 100 simulations. We reply within two working days.

Thanks. We will get back to you within two working days.
Sending failed. Please email info@wve.nl.

We use your details only to reply to this request.