Solar Panels and Battery Storage: The Bundle That's Changing the Game

Three years ago, adding a battery to your solar panels was a luxury. The maths didn't really work unless you were deeply committed to energy independence. That's changed, and the solar + battery combination is now one of the smartest home energy investments available.

Why bundles work better now

Several things have shifted simultaneously:

Battery prices have fallen 40% since 2022. A 10kWh battery that cost £9,000 fitted in 2022 is now £4,500-6,500.

Electricity prices remain high. At 24p/kWh, every unit you use instead of buying from the grid saves real money. A battery maximises self-consumption from roughly 35% to 75-85%.

Smart tariffs create new value. Time-of-use tariffs let you charge cheaply overnight and discharge during peak hours. This works even in winter. Compare what tariffs are available.

Installation is cheaper when combined. Getting both installed together saves £500-1,000 versus adding a battery later - scaffolding is already up, electrician already on site.

What a typical bundle costs

For a 3-bed semi:

• 4kW solar + 10kWh battery: £10,000 - £13,000
• 4kW solar alone: £5,500 - £7,500


• Battery alone (retrofit): £5,500 - £7,500


• Bundle saving: £1,000 - £2,000

All at 0% VAT for domestic installations.

The financial case

Solar only: Save £636/year. Payback: ~10 years.

Solar + battery + smart tariff: Save £1,100-1,200/year. Payback: ~10 years on the combined system.

Same payback, nearly double the annual savings. Over 25 years, that's an extra £10,000-15,000. We covered the battery economics standalone in our battery storage analysis.

Who should consider a bundle?

The combination works best for households that:

• Use more electricity in the evening than during the day
• Have or plan to get an EV charger


• Want to minimise grid dependence


• Are willing to switch to a time-of-use tariff

If you're thinking about solar panels, getting the battery at the same time is almost always worth it. Compare bundle quotes from MCS-certified installers to see what the numbers look like for your home.

Things to compare

Not all batteries are equal. Key specs:

• Usable capacity (not total)
• Charge/discharge rate


• Cycle warranty (most offer 6,000-10,000 cycles)


• Backup capability (not all provide power during outages)


• Smart tariff integration

Our battery sizing guide and best batteries comparison walk through these in detail.