Sign up to Battery Boost, our award-winning battery tariff add-on, and we'll charge your battery at a cheaper rate when the grid's at it greenest.1 Check if you're eligible for Battery Boost. You'll need to be an OVO customer. Not with OVO? Switch now.
Cut your bills by getting your solar set-up to work smarter – even when there’s no sun.
We’ll top up your battery for 10p per kWh — that's up to 60% cheaper than your standard electricity rate.²
We’ll only charge your battery when the grid’s using more renewable power.¹
We do the hard work for you, storing up energy for when you need it most.
We'll take control of your battery, using energy and weather data to predict when your battery will need topping up.
If the sun's not shining, we'll charge your battery with cheaper, greener electricity.1 So you can use it during peak times, when energy from the grid is more carbon intensive.
Each month, we work out the energy we've used to charge your battery and add credit to your account.
Battery Boost has been doing exactly as it says, a boost to our finances
The system decides when to charge the battery from the grid and we get the benefits of cheaper electricity during these winter months. We're saving an average of £50 per month, so it will help to make our system pay for itself even quicker."
Malcolm, Battery Boost customer
To access Battery Boost you’ll need:
An OVO energy account
A smart meter — Don't have one? Book an install
A GivEnergy storage battery, connected to Wi-Fi
Solar panels installed by OVO — Not got solar panels yet? Book a survey
We’ll charge your battery up when there’s less demand on the grid, meaning there’s more renewable power.
The electricity you use will first be charged at your normal OVO rates. At the end of each month, we’ll work out how much energy we’ve used to power your battery. We’ll then add the right amount of credit to your energy account in the first 7 working days of the next month. The cost of powering your battery will reflect the 10p per kWh Battery Boost rate.
It’ll show on your OVO bill as “Battery Boost Credit”. We add credit for Battery Boost to your account in the first 7 working days of each month.
Yes, if you’re on Battery Boost you’ll still be able to export electricity generated by your solar panels. You’ll keep your normal SEG rate.
No, signing up to Battery Boost shouldn't affect any Direct Debit that you’ve already set up for your energy account.
Right now, you won’t be able to opt in for Charge Anytime and Battery Boost at the same time. We’re working hard to let our customers benefit from both add-ons.
Here’s an example. Let’s say your standard electricity rate is 28p per kWh. The Battery Boost rate is 10p per kWh. We’ll credit you 18p (the difference between the rates) for each kWh you’ve used to top up your battery. That means, if you’ve used 300kWh to charge your battery, you’ll get £54 in credit back in your energy account. You can find out more about how we calculate your credit in our terms.
If you don't have a GivEnergy battery, you're unable to get Battery Boost right now. But we're working hard to unlock a wide range of battery brands. So register your interest and we'll get in touch when you're eligible.
1 Our smart tech aims to charge your battery when the grid has more renewable energy in it, at periods of lower demand. Meaning it’s less likely your battery will be charged by energy from fossil fuels.
2 Up to 60% saving based on OVO charging the customer’s battery at the Battery Boost rate of 10p per kWh, versus charging the battery at OVO’s current standard variable rate of 24.51p (Correct at 1 July 2025) which is 59.21% higher. If you override the controls and charge the battery from the grid, you’ll be charged at your standard electricity unit rate.