Sell Surplus Solar to the Grid

How UK Businesses Can Earn from Surplus Solar in 2026

If your business has solar panels on the roof, there's a good chance you're generating more electricity than you use — and sending the excess to the grid for next to nothing in return. That's not a technical problem. It's an admin problem. And it's one that a growing number of UK businesses are starting to fix.

This guide explains how surplus solar export works, why most businesses haven't set it up properly, and what you need to do to turn that wasted generation into a real revenue stream in 2026.

What Happens to Your Surplus Solar Right Now

When your solar installation generates more power than your site consumes, the excess flows back into the national grid. Whether you get paid for it depends entirely on whether you have an active export agreement in place.

Many businesses don't. The solar installation was set up to reduce energy bills, the installer moved on, and nobody followed through on the export side. The power still leaves your site — you just don't get paid for it.

Even where a basic export arrangement exists, it's often not optimised. The rate you're receiving may not reflect what's available in the market, and the admin involved in managing agreements, metering, and payments tends to fall on whoever is least equipped to handle it.

The result: surplus solar energy that should be generating income is quietly going to waste.

Why Selling Surplus Solar to the Grid Is Worth Taking Seriously

The financial case for exporting surplus electricity has strengthened considerably. UK grid operators need flexible, distributed generation to balance supply and demand — and they're willing to pay for it. For businesses with meaningful generation capacity, export revenue can represent a material addition to the bottom line.

Beyond the direct financial return, there are other reasons this matters in 2026:

• ESG reporting: Demonstrating that your on-site generation is actively contributing clean power to the grid supports sustainability disclosures and net-zero commitments.
• Asset utilisation: Your solar installation cost money to put in. Export revenue improves the overall return on that investment.
• Energy cost offset: Export income can help offset rising energy procurement costs elsewhere in your operations.

For commercial landlords, housing associations, and multi-site corporates, the opportunity scales with the number of sites. A portfolio with ten rooftop solar installations could be generating meaningful export revenue across all of them — but only if each site has the right agreements in place.

The Main Barriers Stopping Businesses from Exporting

If the opportunity is clear, why aren't more businesses already doing this? A few consistent barriers come up.

Export agreements are complicated to set up

To sell surplus solar to the grid in the UK, you need a licensed electricity supplier to act as your export counterparty. Finding one willing to take on a single commercial site, negotiating terms, and managing the ongoing relationship is not straightforward. Most energy suppliers treat export as a secondary concern — their focus is on selling energy, not buying it.

Metering and technical requirements

Export typically requires a smart meter or half-hourly metering setup, and sometimes additional equipment depending on your connection type. Getting this right requires coordination between your installer, your Distribution Network Operator (DNO), and your export supplier. For businesses without dedicated energy management resource, this is where things stall.

Payments and reconciliation

Even when an export arrangement is in place, tracking what you're owed, verifying meter readings, and reconciling payments takes time. Without a clear system, it's easy for discrepancies to go unnoticed and for revenue to slip through the cracks.

Lack of internal expertise

Energy Managers and Finance Directors at most SMEs and commercial landlords aren't energy trading specialists. They understand the business case but don't have the bandwidth or technical knowledge to manage export agreements themselves.

What a Managed Energy Export Service Does

A managed export service handles the entire process on your behalf. Instead of navigating export agreements, metering requirements, and payment reconciliation yourself, you hand that off to a specialist and receive transparent payments for the electricity you send to the grid.

The key elements of a well-run managed export service include:

• Onboarding and setup: Getting your site export-ready, including any metering or technical requirements, without you having to coordinate multiple parties.
• Export agreement negotiation: Securing the terms under which your surplus electricity is purchased, so you're not left on a default or suboptimal rate.
• Export optimisation: Actively managing when and how your surplus power is sold to maximise the rate you receive — rather than just exporting everything at a flat rate regardless of market conditions.
• Transparent payments: Clear reporting on how much you've exported, what rate you received, and what you're owed. No black box.

For businesses managing multiple sites, a managed service also provides a single point of contact and consolidated reporting — which is significantly easier than managing separate arrangements for each location.

Who This Is Most Relevant For

Any UK business with on-site solar generation and surplus output is a candidate. But the opportunity is particularly strong for:

Commercial landlords with solar on commercial or mixed-use properties. If your tenants don't consume all the power generated, the surplus can be exported and monetised rather than wasted. Open Power's managed export service for commercial landlords is designed specifically for this scenario.

Housing associations managing large residential portfolios with communal or rooftop solar. Export revenue can support resident benefit objectives and contribute to net-zero commitments. The procurement process is more involved, but the asset volume makes it worthwhile.

Multi-site corporates with solar across several locations. The administrative complexity of managing multiple export arrangements individually is one of the strongest arguments for a managed approach.

SMEs with a single site and a solar installation that was never fully monetised. Even at smaller scale, the revenue is real and the setup process shouldn't be as hard as it often is.

How to Get Started Selling Surplus Solar in 2026

Getting from "we have solar" to "we're earning from export" involves a few practical steps.

1. Understand your current generation and consumption profile

Before anything else, you need to know how much surplus you're actually generating. Your inverter data or smart meter readings will show you total generation. Subtract your site consumption and you have a rough picture of your export potential. Half-hourly data gives you a more accurate view and is typically required for commercial export arrangements anyway.

2. Check whether you already have an export agreement

Some businesses have a basic export arrangement in place without realising it, often set up by the installer. Check your energy contracts and any correspondence from your supplier. If you do have something in place, it's worth understanding what rate you're receiving and whether it's competitive.

3. Assess your metering setup

Commercial export usually requires a smart meter capable of recording export as well as import, often with half-hourly data. If your current metering doesn't support this, it will need to be upgraded as part of the setup process.

4. Decide between DIY and managed

You can approach export suppliers directly and manage the process yourself. This works if you have the internal resource and expertise. For most businesses, a managed service is the more practical route — it removes the admin burden and typically results in better export terms because the service provider has established relationships with buyers.

5. Get a quote and move quickly

Export rates reflect market conditions, and the sooner you have an agreement in place, the sooner you start earning. The onboarding process with a managed service is generally faster than going direct, because the provider handles the coordination.

What Open Power Does

Open Power is a managed energy export service built specifically for UK businesses that generate electricity on-site. The service covers everything from initial setup and export agreement negotiation through to ongoing optimisation and transparent payment processing.

The focus is on removing the admin entirely. You don't need to understand the intricacies of export licensing, metering requirements, or energy market pricing. Open Power handles that and pays you clearly for the surplus power your site sends to the grid.

The service is available to SMEs, commercial landlords, housing associations, multi-site corporates, and community energy groups. If you're generating electricity on-site and not earning from your surplus, it's worth finding out what your site could be generating in export revenue.

The Bigger Picture

The UK's push toward net zero means distributed generation is increasingly valuable. Businesses that invested in solar are sitting on an asset that can do more than reduce their own energy bills. With the right export arrangement, that same generation contributes clean power to the grid and generates a return at the same time.

The barrier isn't technical. It's the admin. And in 2026, there's no good reason to let that admin stand between you and revenue your installation is already capable of generating.

Frequently Asked Questions

Do I need a special meter to sell surplus solar to the grid in the UK?

Yes, commercial export typically requires a smart meter that records both import and export, usually with half-hourly data. If your current setup doesn't support this, it will need to be upgraded as part of the onboarding process. A managed export service will usually coordinate this for you.

Can any UK business with solar export to the grid?

Most businesses with a grid-connected solar installation can export surplus electricity, but you need a licensed electricity supplier to act as your export counterparty. The eligibility and setup requirements vary depending on your connection type, meter setup, and generation capacity.

What's the difference between the Smart Export Guarantee (SEG) and a commercial export agreement?

The Smart Export Guarantee is designed primarily for smaller, domestic or micro-business installations. Commercial export agreements — the kind a managed service would secure for you — are typically more appropriate for larger business installations and can offer better rates, especially when combined with export optimisation.

How long does it take to set up a commercial solar export arrangement?

It depends on whether your metering is already in place and how quickly the necessary agreements can be signed. With a managed service handling the coordination, the process is generally faster than going direct. The goal is to get you from sign-up to first export payment as quickly as possible.

What rate will I receive for my surplus solar?

Export rates vary depending on market conditions, your generation profile, and the terms of your export agreement. A managed export service will negotiate on your behalf and should be able to explain clearly what rate you're receiving and why.

Does it matter how big my solar installation is?

Scale affects how much revenue you can generate, but it doesn't necessarily determine whether export is worth pursuing. Even smaller commercial installations can produce meaningful surplus, particularly during summer months. A quote or assessment will give you a clearer picture of your specific site's potential.

What happens if I have multiple sites with solar?

Managing export arrangements individually across multiple sites is complex and time-consuming. A managed service can handle all your sites under a single arrangement, with consolidated reporting and a single point of contact — which is one of the strongest reasons multi-site operators choose a managed approach.

Your surplus power is already leaving your site. The only question is whether you're getting paid for it.