Octopus Energy Trusted Partner
Greenway Energy Ltd is proud to be an Octopus Trusted Partner, having passed their rigorous vetting process. We work directly with customers referred to us to design and install systems that are properly suited to their home and energy use.
About the Scheme
The Octopus Energy Services Trusted Partner scheme helps connect customers with vetted solar installers in their area.
Installers in the scheme have been assessed for quality, customer service and technical capability to ensure homeowners receive a high-quality installation and support experience.
MCS Certified
Certified for solar and battery installations.
NICEIC Approved
Electrical work to current UK standards.
Google Reviews
Real customer feedback and ratings.
TrustATrader
Verified reviews and profile.
What’s Included
Every system we install is designed around your home, your usage, and how you actually use electricity day to day. As an Octopus Trusted Partner, we focus on practical performance — not generic system sizes or sales-driven packages.
Domestic solar PV system designed to meet your home’s needs
Battery storage to maximise your solar energy usage
Full installation by trained and qualified engineers
Help and support if you’re already an Octopus Energy customer
Access to smart tariffs suited for solar and battery systems
Clear guidance on system design, performance and expected savings
Why Choose Greenway Energy
We’re electricians first, not a sales company. Every system is designed and installed by our own team, focused on long-term performance, safety, and real savings — not inflated promises or one-size-fits-all systems.
We take the time to properly assess your roof, your electrical setup, and how your home actually uses energy day to day. That means systems that are sized correctly, installed neatly, and set up to work with modern tariffs — delivering reliable performance now and flexibility for the future.
Fully assessed and approved through the Octopus Energy Trusted Partner scheme
Qualified MCS-accredited engineers with extensive hands-on installation experience
Survey-led system design based on your roof, household usage and tariff setup
Clean, safe installation work with attention to detail and industry-standard practices
Clear, transparent quotations with no pushy sales or generic system sizes
Local support before, during and after installation — we're here if you need us
How It Works
From your first enquiry through to installation and handover, we keep the process straightforward and transparent. Every step is handled by our in-house team, with clear communication and no surprises along the way.
Initial enquiry — Submit your details and we’ll be in touch very quickly to ask some initial questions about your set up and to arrange a survey.
Home survey — A qualified engineer assesses your roof, electrical setup and energy usage to design a suitable system.
Design & quote — We provide a clear proposal outlining system design, pricing, expected performance and expected return on investment (ROI). We will help you negotiate the available import and export tariffs to enable you to get the most out of your installation
Installation — Our trained and accredited engineers install your system to MCS standards.
Handover & support — Once complete, you’ll receive system documentation and ongoing support if needed.
Roofs we specialise in
We design and install solar on a wide range of roof types across London and the surrounding areas, from straightforward pitched roofs to more complex, multi-level layouts.
Plain tile roofs
The classic suburban roof – neat, low-profile mounting with weather-tight fixings and colour-matched rails.
Slate roofs
Careful detailing for traditional and character properties, using Genius SpeedFlash to ensure complete weatherproofing.
Flat roofs
We specialise in the installation of ballasted and anchored mountings. Ensuring the integrity of the roof surface and optimising generation.
Complex & mixed roofs
Our installers are experienced installing on outrigger dormers, designing L-shaped arrays and navigating around multiple velux windows.
Frequently Asked Questions
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No – we’re an independent, family run solar and battery installation company. We’ve been fully assessed and approved as an Octopus Energy Trusted Partner, which means Octopus are happy to refer their customers to us, but we’re a separate company.
Your energy supply, bills and tariffs remain with Octopus (or whoever you chosen supply is). We handle the survey, design, installation and aftercare for your solar and battery system. -
We work on most common domestic roof types, including:
Plain and concrete tile roofs
Slate roofs
Flat roofs with ballasted or anchored frames
More complex, multi-level or dormer roofs
If your roof is unusual, very steep or in a conservation area, we’ll flag any extra checks needed at the survey stage and explain your options clearly before you commit.
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No – you don’t have to be with Octopus to use us as your installer.
We install systems for:Existing Octopus customers
Homeowners planning to switch to Octopus
Homeowners who want to stay with their current supplier
Some smart export or time-of-use tariffs are only available if you move your supply to Octopus, and they’re usually a very good option, but we’ll talk you through what’s available and you can decide what works best for you.
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In many cases, yes. We regularly retrofit battery storage to existing solar PV systems, even where existing FiT schemes are operating.
We’ll check:The make and model of your existing inverter
How the system was originally wired and commissioned
Whether it’s better to add a separate battery inverter or upgrade part of the system
We’ll then give you a clear proposal showing costs, expected savings and how it will work with any smart tariff you’re on or planning to move to.
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System, hardware or performance issues – we have a “call us first” policy. We installed the system and will diagnose faults, sort out warranty claims and investigate any monitoring issues.
Tariffs, bills or direct debits – contact your energy supplier (Octopus or whoever supplies your electricity). They control your unit rates, standing charges and export payments.
If you’re not sure who to speak to, get in touch with us and we’ll point you in the right direction.
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Yes — we handle the entire DNO process for you.
This includes:Confirming whether your system requires G98 notification, G99 approval, or G100 export limitation
Preparing and submitting all paperwork to your local DNO
Managing any export-limiting requirements if G100 applies
Supplying the full commissioning pack once the system is installed
Ensuring the system is fully compliant before it’s energised
You don’t need to contact the DNO yourself — we take care of the whole lot and keep you updated if anything extra is needed.