Home battery tariff-shifting value calculator UK
Estimate the gross margin from shifting a stated quantity of electricity between tariff periods. Check the formula, worked example and limits before using your own figures.
Enter your figures
Annual tariff-shifting margin
Inputs changed. Select Calculate result to update your estimate.
Use your actual figures. Any prefilled price, fee, rate or return is an editable illustration, not a current product quote. Before degradation, standby use, finance and replacements. Not all tariffs permit the same use. Cycle count, capacity and avoided prices are assumptions you must substantiate.
How the home battery tariff-shifting value calculator uk works
Annual margin = cycles × (discharged kWh × avoided price − discharged kWh ÷ efficiency × charging price).
Data basis: mathematical formula using your inputs. Example prices and rates are illustrative, not current market quotes.
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Worked example: home battery tariff-shifting value
This illustration uses the calculator’s example inputs. It is not a quote or a recommended financial decision.
- Usable energy discharged each cycle (kWh)
- 5
- Cycles per year
- 300
- Round-trip efficiency (%)
- 90
- Charging price (pence per kWh)
- 10
- Avoided price (pence per kWh)
- 30
- Installed battery cost (£)
- 4,000
Annual tariff-shifting margin: £283.33
Annual margin = cycles × (discharged kWh × avoided price − discharged kWh ÷ efficiency × charging price).
Home battery tariff-shifting value: questions answered
What does the home battery tariff-shifting value calculation include?
Annual margin = cycles × (discharged kWh × avoided price − discharged kWh ÷ efficiency × charging price). Use your actual figures. Any prefilled price, fee, rate or return is an editable illustration, not a current product quote. Before degradation, standby use, finance and replacements. Not all tariffs permit the same use. Cycle count, capacity and avoided prices are assumptions you must substantiate.
Using your result
Example inputs are a starting point. Replace them with your figures and select Calculate result. Results are rounded for display; calculations use unrounded values.
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