If you’re thinking about installing solar panels and want to use a well-known energy company, Octopus Energy is likely to be one of the first names you come across. Better known as a household energy supplier, Octopus now also installs solar panels and home batteries, allowing homeowners to generate, store and use more of their own electricity.The company has grown rapidly since launching in 2015, helped by its acquisition of Shell Energy Retail in late 2023. That expansion has made Octopus one of the UK’s most recognisable energy brands, and a major player in the market for home energy services, from smart tariffs and heat pumps to electric vehicle charging and solar installations.In this guide, we explain what Octopus Energy offers solar customers, how its installation process works, what you might pay, and what warranty cover and battery options are available. We also look at how Octopus compares with some of the best solar panel installers in the UK, and whether its mix of brand recognition, smart tariffs and installation support makes it a good option for your home.Get a quote for solar panels for your homeUse our comparison tool to get free quotes from leading solar panel installers.Octopus grew rapidly during the energy crisis, a period when many smaller suppliers collapsed. Since then, it has pushed further into home energy services, adding solar panels and battery installations to its existing renewable tariffs, EV charging products and heat pump offering.That breadth is Octopus’s main advantage as a solar installer. For homeowners who want one company to handle more of their energy setup, Octopus can install panels, supply electricity and gas, provide smart tariffs, buy back excess solar power, support EV charging and fit low-carbon heating systems.This joined-up approach will appeal to households that want to simplify their move towards cleaner energy rather than dealing with several separate companies. However, export rates are still important. Octopus’s flat Outgoing tariff currently pays 12p per kWh for exported solar power, while some rival tariffs may offer higher headline rates with conditions attached. The lower your export rate, the longer it can take to recoup the upfront cost of your solar installation, so it is worth comparing tariffs as carefully as the panels themselves.Why choose Octopus solar panels?Price per installed kilowatt on a standard house: £1,500 for 12 panels With a battery pack: £1,658 Guarantee length: 2-year HIES-backed guarantee and 5-year Octopus workmanship warranty Area covered: England and Wales Typical time from inquiry to installation: 2-3 months Founded: 2022 Batteries are often a good choice for families who use their electricity mainly in the evening. That way, your panels charge your battery during the day, ready for you to use as the sun goes down.Octopus also has a cheap overnight tariff, which can be used to top up your battery for use during the day. This could be particularly useful in winter if you have a smaller array, when solar power might not offer enough for your needs.What’s more, Octopus uses microinverters with some solar packages, which sit beneath individual panels rather than relying on a single indoor string inverter. This can help systems perform better where panels face mixed light conditions or partial shading.Bigger arrays benefit from good export pricing (Octopus Energy)The company offers a 2-year HIES-backed guarantee and 5-year Octopus workmanship warranty. The panels themselves will have a 25-year warranty and Octopus covers England and Wales. The firm can have panels on your roof two to three months after your initial inquiry.How much installing solar panels cost?For solar fitting, Octopus uses JA Solar solar panels at £177 a panel, which deliver up to 455 watts apiece. For more on specific panels, see our guide on the best solar panels. Octopus also offers several battery options, including Tesla Powerwall 3, Fox EVO and Enphase systems. Its current packages include 5kWh, 10kWh and 13.5kWh storage options, with battery warranties varying by product.The company provided us with a helpful breakdown of a quote for a typical three-bed home:ItemCostBase Cost£1,591Labour cost£2,700455 Watt JA Solar Panels x 12£2,124Fox ESS H1 Series Hybrid Inverter£588Fox ESS EP5 5 kWh battery£828Bird mesh£120Scaffolding £1,000Total£8,951Using the above quote, a customer can break even after nine years, Octopus estimates, with more than £14,000 savings being made after 25 years. These are estimates and will vary depending on lots of factors, including placement of panels, wholesale energy pricing and how you use your energy.Pros:One supplier for energy, panels and other supplies Which? Recommended energy supplier 8 years in a row Fixed price quotes Big name brand, albeit a fairly new one Cons:There are cheaper fitters Limited solar panel choice, although many models can be very similar (Octopus/Barratt Redrow)Can I get a grant for Octopus solar panels?Yes, you might be eligible, but it depends on your household and property. Here’s what to know:Grant availabilityOctopus Energy’s solar panel offering points to the Energy Company Obligation (ECO) scheme (England & Wales) as the main route for subsidised solar installs. According to Octopus, under ECO, some eligible homes can install solar panels (and sometimes heat pumps) at zero cost. For other homeowners, wider funding options may include the Warm Homes: Local Grant in England, which is delivered through local authorities and can support eligible low-income households with measures such as insulation, solar panels and air source heat pumps. Availability depends on your household, property, postcode and council participation.Eligibility conditionsTo qualify under ECO (via Octopus) you typically need:A home with an EPC rating of E, F or G. Private rent or social housing, or being in receipt of means-tested benefits.Roof and home gear suitable for solar + heat pump (if required).Octopus emphasises that not all applicants are guaranteed installation; suitability and survey outcomes matter. If you do not meet grant criteria, you may still proceed via a paid installation, and you’ll still benefit from VAT relief, export tariffs and savings on electricity. For more on these and other funding and savings options, see our guide to solar panel grants and funding.What to do nextFill in Octopus’ eligibility checker or request a quote. Have a professional roof/home survey done to check solar suitability.Check your EPC rating, benefits status, and whether pairing with a heat pump is required (for some funding).If you don’t qualify for grants, consider the pay-back analysis and savings section below.Bottom line: Grants for Octopus solar panels are available, but they are limited to certain households under ECO/HUG-type schemes. Most homeowners will instead depend on cost savings and export payments.How much can I save on energy bills with Octopus?Here’s a realistic look at savings you might achieve with Octopus solar, and what to bear in mind.What Octopus claimsOctopus states that a combined solar-panel + battery system on its “Fixed Outgoing” tariff can reduce a medium-use home’s electricity bill by around 90%. According to their blog: “a typical household could save between £400 and £600 per year” from solar alone (without battery), depending on size of system and usage. When you add a battery and export tariff they suggest you may even earn up to £300 a year by exporting surplus energy. Octopus has several solar export tariffs, but availability can change. At the time of writing, Octopus Flux is listed as temporarily unavailable, while Intelligent Octopus Flux remains promoted for eligible homes with compatible solar and battery storage.What you should checkYour energy usage pattern: how much you use, when you use it, and how much you consume during the day (when solar is generating).Your system size and battery: larger homes and households with evening usage benefit more when paired with a battery.Your tariff and export deal: Membership of an export-friendly smart tariff and good export rates improve ROI.Location, roof orientation and size: installations in north-facing roofs, heavy shading or smaller systems will reduce savings.Up-front cost and pay-back period: despite savings, most systems take 8–12 years (or more) to pay back in the UK context. Remember, these figures from Octopus are all estimates. Your actual savings will vary widely based on usage, system size, roof, battery and export rate.