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Battery tariff arbitrage Calculator
Estimate savings from storing cheaper electricity for peak use. This free battery tariff arbitrage calculator shows the calculation and its assumptions so you can compare your own figures.
Your results
Estimate savings from storing cheaper electricity for peak use.
Calculated outcomes
- Delivered Per Cycle KWh
- 9 kWh
- Purchased Per Cycle KWh
- 10 kWh
- Saving Per Cycle
- €1.95
Assumptions and estimates
- Method: Delivered energy = capacity × usable fraction. Purchased energy = delivered ÷ round-trip efficiency. Saving deducts charging cost.
- Assumes enough cheap-rate charging time and peak demand. Excludes degradation, standby power, financing and backup value; solar opportunity cost can be entered as the charging tariff.
Useful next steps
- Check the payback period against how long you will keep the vehicle.
- Use Compare options to test an alternative side by side.
- Copy, print or download a record of this calculation when you need one.
Reports open your email app addressed to s@s1.ie with the public page address only. Your inputs are never added.
How the battery tariff arbitrage calculation works
Delivered energy = capacity × usable fraction. Purchased energy = delivered ÷ round-trip efficiency. Saving deducts charging cost.
Assumes enough cheap-rate charging time and peak demand. Excludes degradation, standby power, financing and backup value; solar opportunity cost can be entered as the charging tariff.
Using this calculator
- Enter your own figures in the labelled inputs. Keep the currencies, units and time periods consistent.
- Choose any applicable rate profile, pattern or assumption shown for this tool. Open additional inputs when relevant.
- Review annual saving and simple payback years, then read the stated assumptions and eligibility conditions before using the result.
Worked example
This is a static example using illustrative inputs, not facts about you or today’s date. The displayed eligibility selections and assumptions apply only to this example.
See example inputs
- Battery capacity (kWh)
- 10
- Usable depth of discharge (%)
- 90
- Round-trip efficiency (%)
- 90
- Full-equivalent cycles each year
- 300
- Charging tariff (€/kWh)
- 0.12
- Avoided peak tariff (€/kWh)
- 0.35
- Battery installed cost (€)
- 6000
- Annual Saving
- €585.00
- Simple Payback Years
- 10.26 years