UK Negative Power Prices Calculator

Estimate whether a negative UK power price window is worth shifting appliances, EV charging, or battery load into.

Bill impactLoad capacityCopyable plan

UK negative power prices calculator

Window rate (p/kWh)Regular rate (p/kWh)

Shiftable load (kWh)Device power (kW)

Negative half-hour slotsStanding charge (p/day)

Estimated saving£3.64

Use the window for flexible load. 14 kWh fits inside a 2-hour window.

UK negative power prices plan
Window rate: -2p per kWh
Regular tariff avoided: 24p per kWh
Usable load in this window: 14 kWh over 2 hours
Window bill impact: -£0.28
Estimated saving vs regular tariff: £3.64
Unshifted load: 4 kWh (£0.96)
Net day impact with standing charge: £1.28
Decision: Use the window for flexible load

Before scheduling:
- Verify the live half-hour price in your supplier app.
- Confirm your appliance, EV charger, or battery can safely run unattended.
- Treat this as an estimate; supplier rules, VAT, and export settings can differ.

Verify tariff Market data

Use the tool first, then verify official details

Enter details

Use the fields above to describe your local situation, time zone, price, deadline, or event plan.

Review the result

The page generates an in-site estimate, decision, checklist, or copyable plan before you leave the site.

Verify sources

For time-sensitive facts, confirm official sources before making a purchase, filing, traveling, or attending.

FAQ

What does the UK Negative Power Prices Calculator do?

Estimate whether a negative UK power price window is worth shifting appliances, EV charging, or battery load into. The result updates from the inputs you enter so you can use the output directly on the page.

Can I use this uk negative power prices tool without an account?

UK Negative Power Prices Calculator runs in the browser and does not require signup. External links, when present, are only for secondary verification after the in-page result is generated.

Should I verify the uk negative power prices result?

Use the result as a practical estimate or formatted output. For time-sensitive, legal, tax, security, purchase, or local decisions, verify against official sources before acting.