Octopus Energy Solar Panels Review 2026
Prices, Flux tariff, customer reviews, and comparison with Project Solar, British Gas, and local installers
Key Takeaways
- Starting price: From £6,163 for a standard system
- Panels: JA Solar with 25-year warranty
- Unique selling point: Octopus Flux tariff — up to 31p/kWh export rate
- Battery: Fox ESS, Enphase, or Tesla Powerwall 3
- Installation: In-house MCS-certified teams
- Trustpilot: 4.8 stars
Octopus Energy has grown from a challenger energy supplier into one of the UK's largest solar panel installers. Octopus solar panels come with a big draw: the Flux tariff, which pays up to 31p per kWh for electricity you export during peak hours. That's among the highest export rates in the country.
But a good export tariff doesn't automatically make Octopus solar panels the best choice for every home. This review looks at what they actually cost, which panels they fit, how Flux works in practice, and whether the package holds up against dedicated solar installers like Project Solar and local MCS-certified companies.
Who Are Octopus Energy Solar?
Octopus Energy was founded in 2015 and quickly grew into the UK's largest energy supplier. They entered the solar installation market to offer an end-to-end renewable energy service: install the panels, supply the energy tariff, and manage the export payments all under one roof.
Unlike some energy suppliers who white-label solar installations through third parties, Octopus uses in-house MCS-certified installation teams. This gives them direct control over quality and simplifies the customer experience — one company handles everything from quote to ongoing support.
Their solar offering includes panels, battery storage (Fox ESS, Enphase, or Tesla Powerwall 3), and integration with their smart tariffs. The real value proposition is the ecosystem: solar panels feeding into a battery, managed by the Octopus app, earning money through Flux export rates.
How Much Do Octopus Solar Panels Cost?
Octopus solar panels start from around £6,163 for a standard home installation. Here's what to expect at different system sizes:
| Package | System Size | Estimated Cost | Best For |
|---|---|---|---|
| Solar only | 3-4 kW | From £6,163 | 2-3 bed house |
| Solar + battery | 4 kW + battery | ~£9,500-£11,000 | 3-4 bed house |
| Large system | 5-6 kW + battery | ~£11,000-£14,000 | 4-5 bed house |
These prices are competitive with the UK average. The MCS national average for a 3-4 kW system sits at ~£7,279, so Octopus comes in slightly below for solar-only installations. Adding a battery brings the total closer to the £10,000-£11,000 range.
All residential solar installations qualify for 0% VAT until March 2027.
Want to see what solar would save you? Use our free calculator for a personalised estimate.
What Panels Does Octopus Energy Use?
Octopus Energy currently installs JA Solar panels. JA Solar is one of the world's largest panel manufacturers, producing reliable mid-to-high efficiency modules used by installers worldwide.
| Panel | Efficiency | Warranty | Technology |
|---|---|---|---|
| JA Solar (standard) | ~21.3% | 25 years | Monocrystalline |
At ~21.3% efficiency, the JA Solar panels are solid but not the highest-efficiency option on the market. Installers like Project Solar offer panels at 22%+ efficiency. The practical difference on most UK roofs is small — perhaps one extra panel needed to achieve the same output — but it's worth considering if roof space is limited.
The 25-year warranty is standard for the industry and provides adequate coverage. Most modern panels produce 85-90% of their original output after 25 years.
Octopus Flux Tariff — The Big Differentiator
The Octopus Flux tariff is what really sets Octopus apart from other solar installers. It's a time-of-use tariff designed specifically for homes with solar panels and battery storage.
How Flux Works
- Peak export (4-7pm): Up to 29-31p/kWh — sell stored solar at the highest rate
- Off-peak import (2-5am): Cheaper electricity — charge your battery from the grid
- Standard rates: Apply outside peak/off-peak windows
The strategy is straightforward: your panels charge the battery during the day, you export that stored energy during the expensive peak window (4-7pm), and if needed you top up the battery from cheap grid power overnight. Reported earnings vary — some households see £35-110 per month in summer, though winter returns are typically lower.
To get the most from Flux, you need:
- A compatible battery (Fox ESS, Enphase, or Tesla Powerwall 3 through Octopus)
- A smart meter (SMETS2, or a compatible SMETS1 such as Secure-branded meters)
- An Octopus Energy account (Flux is open to any Octopus customer, not just those who bought Octopus solar)
That last point is important: you don't need to buy your solar panels from Octopus to use Flux. Any MCS-certified installation with a compatible battery qualifies.
For a full comparison of export rates, see our best SEG tariffs guide.
Battery Storage
Octopus Energy offers three tiers of battery storage to pair with their solar installations:
| Tier | Battery Brand | Capacity | Approx. Cost |
|---|---|---|---|
| Smart | Fox ESS | From 5 kWh | From £3,447 |
| Optimised | Enphase | 5-15 kWh | Mid-range |
| FuturePower | Tesla Powerwall 3 | 13.5 kWh | £7,499 |
A battery is practically essential if you want to take full advantage of the Flux tariff. Without one, you're limited to standard Smart Export Guarantee rates (typically 4-15p/kWh). With a battery and Flux, you can earn around 30p/kWh during peak hours.
For a broader look at battery options, see our home battery guide and Tesla Powerwall 3 review.
Installation Process
Octopus Energy's solar installation follows a straightforward process:
- Online quote: Enter your address and energy usage on the Octopus website
- Design proposal: Receive a system design based on satellite imagery of your roof
- Site survey: A technician visits to confirm the design and check your electrics
- Installation: Typically completed in 1-2 days
- Commissioning: System testing, MCS registration, and app setup
- Flux activation: Switch to the Flux tariff through your Octopus account
The end-to-end timeline is typically 4-6 weeks from initial enquiry to switch-on, depending on DNO approval times in your area. This is broadly in line with other national installers.
Customer Reviews
Review Summary
- Trustpilot: 4.8 stars (as an energy supplier — solar-specific reviews mixed in)
- Key strength: Flux tariff earnings exceed expectations for many customers
- Key weakness: Wait times for installation can be long during busy periods
What customers praise
Customers consistently highlight the Flux tariff as delivering real savings. The integration between panels, battery, and the Octopus app receives praise for making energy management simple. The installation teams are generally well-reviewed for professionalism.
What customers flag
- Wait times: High demand means some customers wait months for installation
- Panel choice: Some customers would prefer higher-efficiency panel options
- Customer service: As a large company, getting through to the right support team can take time
Pros and Cons
Pros
- ✓ Octopus Flux tariff pays up to 31p/kWh during peak export — among the UK's best
- ✓ Competitive starting price from £6,163
- ✓ In-house MCS-certified installation teams
- ✓ Tight integration: panels + battery + tariff + app all in one
- ✓ Flux available even if you didn't buy Octopus solar
- ✓ 25-year panel warranty
- ✓ One of the UK's largest and most trusted energy brands
Cons
- ✕ JA Solar panels at ~21.3% efficiency — not the highest available
- ✕ Long wait times during peak demand periods
- ✕ Battery practically essential to maximise Flux value
- ✕ Flux rates can change — not guaranteed long-term
- ✕ Less flexibility on panel and battery brand choice
- ✕ Solar reviews mixed into broader Trustpilot energy reviews
Octopus Solar vs Competitors
| Feature | Octopus Energy | Project Solar | British Gas | Local MCS Installer |
|---|---|---|---|---|
| Starting price | ~£6,163 | ~£6,100 | ~£7,000 | ~£5,000-6,000 |
| Panel brand | JA Solar | Evo Max / SunPower | Varies | Varies |
| Panel efficiency | ~21.3% | 22.18%+ | ~20-21% | Varies |
| Export tariff | Flux (up to 31p/kWh) | Project Solar+ | Standard SEG | Any SEG provider |
| Battery | Fox ESS / Enphase / Tesla | CURV / SolaX / FoxESS | Tesla Powerwall | Varies |
| Panel warranty | 25 years | Lifetime (select) | 25 years | 25 years typical |
| Unique advantage | Flux tariff ecosystem | Premium panels + warranty | Brand trust | Price + personal service |
Octopus wins on the tariff integration front. If maximising your export income is the priority, the Flux tariff is the best reason to go with Octopus. However, if panel efficiency and warranty length matter more, Project Solar has the edge. Local MCS installers typically beat both on upfront price.
Compare MCS-certified installers in your area to see what's available locally.
Is Octopus Energy Solar Worth It?
Octopus solar panels are worth considering if you want everything under one roof — panels, battery, and export tariff managed by a single company. The Flux tariff is genuinely hard to beat for export income, and the starting price is fair.
The main trade-off is panel quality. JA Solar panels are reliable but not top-tier. If your roof space is tight or you want the highest output per square metre, look at Project Solar or SunPower-focused installers instead.
One thing worth knowing: you don't need to buy Octopus solar panels to use the Flux tariff. If a local installer quotes better on higher-efficiency panels, you could install through them and still switch to Flux afterwards.
Best for
- Homeowners who want a simple, integrated solar + battery + tariff package
- Those who want to maximise export income through time-of-use tariffs
- Existing Octopus Energy customers
Look elsewhere if
- You want the highest-efficiency panels available
- You prefer more flexibility on battery and panel brand choice
- You want the lowest upfront cost — local installers are typically cheaper
Frequently Asked Questions
How much do Octopus Energy solar panels cost?
Octopus Energy solar systems start from around £6,163 for a standard residential installation. Adding battery storage brings the total to approximately £9,500-£11,000. All residential installations qualify for 0% VAT until March 2027.
Is Octopus Energy good for solar panels?
Octopus Energy is a reputable solar installer with MCS certification and in-house teams. Their standout feature is the Flux tariff, which pays up to 31p/kWh for exported electricity. The panels themselves (JA Solar) are reliable mid-range, with 25-year warranties.
What is the Octopus Flux tariff?
Flux is a time-of-use tariff that pays 29-31p/kWh for electricity exported during peak hours (4-7pm) and offers cheaper import rates overnight. You need a battery and smart meter to benefit fully.
Does Octopus Energy install solar panels themselves?
Yes. Octopus primarily uses in-house MCS-certified teams. In some areas they use vetted "Octopus Trusted Partners" — third-party MCS-certified installers. Either way, you get consistent quality and warranty support.
What solar panels does Octopus Energy use?
Octopus currently installs JA Solar monocrystalline panels at approximately 21% efficiency with 25-year warranties. JA Solar is one of the world's largest panel manufacturers.
Can I get Octopus Flux without Octopus solar panels?
Yes. Any Octopus Energy customer with solar panels and a compatible battery can access the Flux tariff, regardless of who installed the system. You'll need a smart meter.