Solar & Battery Options
Octopus Energy offer a range of solar & battery combinations to suit each home based on it's size, energy usage, and other smart tech used in the home. Mention our packages to your solar specialist after you get a quote, and they can help you choose the best option for your home.
Here's an overview of the packages (or scroll down to read about them in detail!):
| Essential | Smart | Tesla | |
|---|---|---|---|
| Battery size options | 5 kWh | 5/10 kWh | 13.5 kWh |
| Best tariff | Outgoing Octopus | Intelligent Octopus Flux | Intelligent Octopus Flux |
| Inverter | Separate inverter | Microinverters | Built-in inverter |
| Whole home back-up option | No | No | Yes |
| Price | £ | ££ | £££ |
Essential Solar + Battery 🔋
The value option that lets you be more hands-on to manage your export
Perfect for: straightforward roofs (no shady spots!) - match your solar generation with battery to avoid peak rates.
- Comes with a wall-mounted inverter, and the option to add a 5 kWh battery
- Backed by a 12-year warranty for inverter and battery
🐙 Works best with: Outgoing Octopus
From £7,415 for 4 solar panels + a battery
(Solar panels-only and battery-only options are available)
More detail
BASE Essential package:
- Includes: Between 4 to 12 PV panels (450W), Fox ESS H1 inverter (3.7kW), and Fox ESS EP 5.18 kWh battery
- System size: 1.8 to 5.4 kW
- Estimated annual output*: ~1,400 - 5,400 kWh
- Typical bill savings**: between 54% - 120%
Smart Solar + Battery💡
Optimise output, use your own energy, and make the most of export
Perfect for: shaded or larger roofs - make the most of every sunbeam with panel-by-panel optimisation + monitoring.
- Comes with microinverters, and the option to add 5 kWh or 10 kWh batteries
- Backed by a 25-year warranty for the microinverters and 15-year warranty for the battery
🐙 Works best with: Intelligent Octopus Flux
From £8,687 for 4 solar panels + a battery
(Solar panels-only options are available)
More detail
BASE Smart package:
- Includes: Between 4 to 30 PV panels (450W), Enphase IQ Microinverters, and 1-2x Enphase IQ Battery 5P (5 kWh each)
- System size: 1.8 to 13.6 kW
- Estimated annual output*: ~1,400 - 11,650 kWh
- Typical bill savings**: between 58% - 255%
Octopus x Tesla - FuturePower 🐙⚡️
For energy independence and off-grid reliability
Perfect for: ultimate levels of control and monitoring - power your whole home (even in a blackout!)
- Customisable: use expansion packs to double or triple storage
- Backed 10-year warranty on the battery (and built-in inverter)
🐙 Works best with: Intelligent Octopus Flux
From £11,862 for 4 solar panels + a battery
(Battery-only options are available)
More detail
- Includes: Between 10 to 30 PV panels (450W) and a Tesla Powerwall 3 (13.5 kWh)
- System size: 2.7 - 13.6 kW
- Estimated annual output*: ~2,200 to 11,700 kWh
- Typical bill savings**: between 95% - 271%
Tesla packages aren't available for solar-only installs as Tesla inverters are built-in to Tesla batteries.
*Estimated output based on an average of ~850 kWh per kW installed per year as used in our standard marketing claims, this may vary by region. A detailed breakdown will be included in your formal solar system quote and sales contract.
** These are the modelled electricity bill savings for a south west facing London home with a 30 degree roof, Ofgem average electricity usage and the solar, battery and tariff specified. See detailed calculations below. Actual savings will depend on location, installation, electricity use and tariff. A personalised saving will be provided in your formal solar system quote and sales contract.
Detailed calculations
Here is an example calculation for a medium use home with an 8 panel and a Fox 5kWh battery system on our Octopus Flux tariff (£179) compared to no solar installation on a Standard tariff (£879). This is a saving of £700 or 80% of their total electricity bill.
Standard Electricity Bill, G1 = A1*D1/100 + E1*365/100
Octopus Flux Electricity Bill, G2 = (A2- B2*C2)*D2/100 - (B2-B2*C2)*F2/100 + E2*365/100
Electricity Bill Saving (£), H = G1 - G2
Electricity Bill Saving (%), I = G1/H
Where A - F are:
A1/A2 - 2,700kWh Ofgem average household usage*
* Low use (2,100kWh) 4-6 panels, medium use (2700kWh) 8-12 panels, high use (4,100kWh) 12+ panels
B2 - 3,200kWh annual energy generation from 8 panels with Fox 5 kWh battery**
**Generation from OpenSolar on a 30 degree roof in South West London
C2 - 59% self consumption from MCS ‘in half the day’ look up tables
D1 - 25.73p/kWh Flexible Octopus electricity import rate (1st July 2025)
D2 - 22.49/kWh Octopus Flux electricity import rate (1st July 2025)
E1/E2 - 50.41 p/kWh average Flexible Octopus electricity standing charge (1st July 2025)
F2 - 14.30 /kWh Octopus Flux electricity export rate (1st July 2025)
Hey I'm Constantine, welcome to Octopus Energy!
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