Do Home Batteries Work Without Solar Panels?
Yes. Home batteries can save you hundreds of pounds per year even if you don't have solar panels. Here's how it works.
The short answer
Most people assume home batteries are only for storing solar energy. That's one use case, but it's not the only one - and for many UK households, it's not even the best one.
Home batteries work brilliantly with time-of-use electricity tariffs. These tariffs charge different rates at different times of day. The most popular is Octopus Go, which charges just 7p/kWh overnight (12am-5am) compared to around 29p/kWh during the day.
The key insight: A home battery lets you buy electricity when it's cheap and use it when it's expensive. No solar panels required.
How tariff arbitrage works
It's simple maths. You charge your battery overnight at 7p/kWh. During the day, instead of buying electricity at 29p/kWh, you use the stored energy from your battery.
Every kWh you shift from day to night saves you 22p. A 5kWh battery cycled daily saves you around £1.10 per day, or £400+ per year. A 10kWh battery? That's £800+ in annual savings.
Daily savings example (10kWh battery)
Overnight charging cost: 10kWh × 7p = 70p
Daytime electricity avoided: 10kWh × 29p = £2.90
Daily saving: £2.20 → £800+/year
What tariff do I need?
Any time-of-use tariff with cheap overnight rates works. The most popular options in the UK are:
Intelligent Octopus Go – 7p overnight (12am-5am), around 29p during the day. The most popular choice for battery owners.
Intelligent Octopus Go – Similar rates, designed for EV owners but works for batteries too.
Economy 7 – The original time-of-use tariff. 7 hours of cheap overnight rates. Works well with batteries.
What about solar?
If you have solar panels, great—a battery helps you store your free daytime generation for evening use. But solar isn't required. In fact, for homes without south-facing roofs, in flats, or renting, a battery-only setup often makes more sense than trying to install panels.
The economics work either way. Tariff arbitrage alone justifies the investment.
How long until it pays for itself?
With current electricity prices and a properly-sized battery, payback is typically 3-4 years. After that, you're saving £600-800+ every year for the remaining 10+ years of the battery's life.
Get £100 off at launch
Pre-configured home batteries for UK tariffs. No solar required.
Why Ohmie?
Most battery companies assume you have solar. We don't. Ohmie bundles are pre-configured for UK time-of-use tariffs, include everything you need (battery, inverter, cables, mounting), and can be installed by any electrician.
No compatibility research. No hunting for parts. Just a box that saves you money from day one.