Can You Install Battery Storage Without Solar Panels?

Most people think of home battery storage as an add-on to solar panels. But a home battery can deliver meaningful financial savings even without a single solar panel on your roof.

How Battery Storage Works Without Solar

Without solar, a home battery operates on grid electricity:

1. Overnight: The battery charges from the grid during the cheapest available tariff window 2. Morning and evening: The battery discharges to power your home during expensive peak periods 3. Net result: You buy electricity when it is cheap and use it when it would otherwise cost more

This is called tariff arbitrage.

The Numbers Behind Tariff Arbitrage

Octopus Go: Cheap rate approximately 7p/kWh overnight, standard rate approximately 24p/kWh. Differential: 17p per kWh.

Octopus Intelligent Flux: Cheap rate approximately 7p/kWh, peak rate approximately 35p/kWh. Differential: 28p per kWh — the strongest arbitrage currently available.

For a 5kWh battery fully charged overnight and discharged during peak: - Octopus Go differential: 5kWh × 17p = 85p/day, £310 per year - Octopus Flux differential: 5kWh × 28p = £1.40/day, £511 per year - 10kWh battery at Flux differential: £1,022 per year

Is It Financially Worthwhile?

A 5kWh battery without solar typically costs £4,500 to £5,500: - At Go savings of £310/year: payback 14 to 18 years — marginal - At Flux savings of £511/year: payback 9 to 11 years — more compelling

A 10kWh battery at £6,500 to £8,000 with Flux savings of £1,022/year: payback 6 to 8 years — financially sound.

Adding Solar Later

If you install a battery without solar now and plan to add panels later, specify this at the survey stage. We design the installation to be solar-ready so adding panels later requires no rewiring.

Contact Amppro Electrical for a free survey to find out whether battery storage makes financial sense for your specific situation.