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Tesla Powerwall 3, home battery
13.5 kWh, charging at up to 5 kW and discharging at up to 11.5 kW, on a tariff that would follow the day-ahead price quarter-hour by quarter-hour.
Round-trip efficiency 89 %, from Tesla's datasheet. Network charges and taxes, which a household pays on every kWh it draws, are left out.
Year by year
| Year | PnL | Cycles |
|---|---|---|
| 2017 | €127 | 479 |
| 2018 | €137 | 489 |
| 2019 | €112 | 498 |
| 2020 | €114 | 492 |
| 2021 | €327 | 599 |
| 2022 | €746 | 625 |
| 2023 | €401 | 643 |
| 2024 | €398 | 670 |
| 2025 | €500 | 745 |
| 2026 to 18 Oct | €620 | 689 |
A cycle is the battery's capacity charged once.
Month by month
Click a bar to see that month's days.
Simulate further with a free account
The next five years on our calibrated price model, in a low, a base and a high scenario: the median and the conservative figure of each year, and the NPV and IRR on your own size and capex.
Indicative figures only
They come from simplified models: past prices, an asset as its datasheet describes it, and a battery that knows the next day's prices when it plans a day. Before any fee, tax, grid tariff or wear of the battery. They are neither a forecast, an offer nor investment advice.
A household in France does not trade on the day-ahead market: the home battery is shown as if its tariff followed that price, which overstates what it would save.
Tesla, Powerwall and Megapack are trademarks of Tesla, Inc. Rigular is not affiliated with Tesla; the specifications are those of its public datasheets.
How it is computed
- Prices: the day-ahead auction of the French bidding zone, published by ENTSO-E, hourly until 30 September 2025 and by the quarter-hour since. The figures run to yesterday and are updated every morning.
- Battery: dispatched exactly on each day knowing the next, from an empty battery on 1 January 2017, the energy left at midnight carried to the next day, and a cycle only when it clears 5 € per MWh discharged.
- The past only: what the market may do next takes a price model, which an account shows on these same assets.