Introducing Sunsave Home Battery and Sunsave Sona

Charge up on cheap energy

In the past, home batteries were used as an add-on to solar panels – a way to store excess electricity for later use, rather than sending it to the grid.

In the late 2010s, they started to become an established sidekick, to the extent that 94% of new solar installations now include a battery.

But you no longer need to pair a battery with solar panels to make it worthwhile.

The technology now stands on its own thanks to falling hardware costs, virtual power plants, and a new generation of time-of-use tariffs.

These tariffs come with peak and off-peak periods that change the price of your electricity, depending on the time of day. They're like Economy 7 tariffs, but usually much cheaper.

You can charge your battery with off-peak electricity – generally at night – then use this cheap power during the peak period. This could cover the vast majority of your daily usage, potentially saving you hundreds of pounds per year.

In fact, we estimate that a typical household could save £809 each year with a home battery – or £173 after the cost of the battery. Homes with higher electricity usage can save even more.

So if your home isn't right for solar panels, you can still use home energy tech to save meaningful money on your bills. Click here to learn more about Sunsave Home Battery.

Start saving with no upfront cost

For many people though, the prospect of spending thousands of pounds on a battery is unappealing and unrealistic – so we've made it more accessible.

With Sunsave Home Battery Plus, you can get one with no upfront cost, so there's no need to spend a large chunk of your savings while waiting to break even.

Instead, you can make monthly payments for up to 10 years – and save more than you pay straight away.

This isn't a lease, so you'll own your system from day one, and you can pay it off (in full or in part) with no penalties – whenever you like.

And if you prefer to pay upfront, we also offer Home Battery Standard.

You’ll have long-term protection

However you choose to pay, you get a 10-year insurance-backed workmanship guarantee, and 10-year product warranties on both your battery and inverter.

Given a battery lasts around 10-12 years before it needs replacing, this means it’ll be protected for the vast majority of its expected lifespan.

Save more without lifting a finger

We’re also delighted to announce the launch of Sunsave Sona, our smart algorithm, which works in the background every day to get you the best possible savings.

Sunsave Sona uses intelligent scheduling to make sure your battery is buying the optimal amount of electricity at the lowest price available.

It also connects your battery to other Sunsave customers’ batteries, so they can work together to create a Virtual Power Plant (VPP).

To help balance supply and demand, the grid looks for extra capacity when it has extra electricity it needs to store. An individual household’s battery can’t give them much capacity, but a network of them can.

The grid borrows the extra capacity our VPP creates – and pays everyone involved for helping out.

We guarantee Sunsave Home Battery customers a minimum monthly payment of £15 for the first 12 months, so you'll receive at least £180 in your first year, on top of all your other savings.

And you may well earn more than that. We’ve been testing our VPP with customers since October 2025, and we’ve paid over the guaranteed minimum amount every month so far, with an average monthly payout of around £23.

Sunsave Sona is also available to our Solar & Battery Plus customers with compatible tariffs, and ensures that any exported electricity earns the highest price.

It's free to join Sunsave Sona, you can opt out at any time, and you can easily track your VPP earnings with the new Sunsave app.

Click here to learn more.