Updated: June 2026 • Energy Solutions NW
What Are Time-of-Use Tariffs?
Time-of-use tariffs charge different prices for electricity depending on the time of day, with cheaper rates at off-peak times such as overnight. Paired with a solar battery, you can store low-cost or solar electricity and use it when grid prices are highest, helping cut your bills.This guide explains battery storage with time-of-use tariffs — off-peak charging, peak-time savings and pairing with solar — for North West homes.
A battery turns a smart tariff into an opportunity: buy cheap, use later. Here’s how it works.
For the wider storage picture, see our solar battery storage guide.
What Are Time-of-Use Tariffs?
A time-of-use tariff charges different prices depending on when you use electricity, rather than one flat rate all day.
Typically that means cheaper off-peak periods (often overnight) and more expensive peak periods. Smart meters make these tariffs possible by recording when you use power.
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How a Battery Works With a Time-of-Use Tariff
On its own, a time-of-use tariff only helps if you can shift your usage to cheaper times. A battery does that shifting for you.
It can store electricity when it’s cheap — from your panels or the grid — and release it when prices are high, so you draw less from the grid at peak rates.
Charging From Cheap Off-Peak Electricity
Many smart tariffs offer lower overnight rates. A battery can charge during these windows, topping up cheaply ready for the day ahead.
This is especially useful in winter or during dull spells, when your panels generate less and the battery would otherwise sit part-empty.
Using Stored Power at Peak Times
When grid prices are at their highest — often early evening — your home can run from the battery instead of buying expensive electricity.
The saving comes from the gap between the cheap rate you charged at and the peak rate you’d otherwise have paid.
Combining Solar, Battery and Smart Tariffs
With all three together, your battery fills from free solar when the sun’s out and from cheap off-peak power when it isn’t.
You can also weigh up storing power versus exporting it — our guide on battery storage vs the Smart Export Guarantee covers that trade-off.
Is a Time-of-Use Tariff Right for You?
It depends on your usage and the tariffs available to you. The bigger the gap between off-peak and peak rates, the more a battery can do.
Tariffs change often, so it’s worth comparing what’s on offer. We can make sure your battery is set up to work with smart tariffs from the start.
Why Choose a Professional Installer?
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- Tariff-ready setup: systems configured to charge and discharge on smart tariffs.
- MCS certification: required to access the Smart Export Guarantee for exported electricity.
- Right sizing: a battery matched to your usage and charging windows.
- Proper integration: solar, battery and meter working together correctly.
What Happens When You Request a Quote?
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- Submit the form: tell us about your property and energy use.
- We review: our team looks at your usage and requirements.
- Free consultation: we discuss battery and tariff options with no obligation.
- Tailored quote: you receive a plan designed around your specific needs.
Related Guides
Frequently Asked Questions
What is a time-of-use electricity tariff?
It’s a tariff that charges different prices depending on when you use electricity — typically cheaper off-peak (often overnight) and more expensive at peak times. A smart meter is needed to use one.
Can I charge my solar battery from the grid overnight?
Yes, if your system is set up for it. Many homes charge the battery from cheap off-peak electricity, then use that stored power during expensive peak periods.
Do I need solar to benefit from a time-of-use tariff?
Not necessarily — a battery alone can store cheap off-peak power for peak use. Adding solar lets the battery also fill from free daytime generation, which can increase the benefit.
Last updated: June 2026
Disclaimer: This article is for informational purposes only. Energy savings estimates are based on industry averages and may vary depending on your property, energy usage, system size, and electricity tariff. We recommend obtaining a personalised quote for accurate savings estimates. Energy Solutions NW is part of the Blue Rock Energy network. MCS certified. NICEIC approved.
