Best Solar Panel Financing Options UK: A Complete Guide

Installing solar panels can reduce your reliance on grid electricity, lower energy bills and improve the energy performance of a property. But for many homeowners, landlords and businesses, the biggest question is simple: how will I pay for solar panels?

Fortunately, you don’t always need to cover the full installation cost upfront. There are several solar panel financing options available in the UK, from paying in cash and using green loans to finance agreements, grants and commercial solar funding.

The right option depends on your property, available capital, expected energy savings and whether you are installing solar for your home, rental property or business.

At Low Energy Services, we help property owners across Scotland, England and Wales explore the practical benefits of solar PV and find an installation approach that works for their property.

What is solar panel financing?

Solar panel financing refers to the different ways you can fund the purchase and installation of a solar PV system without necessarily paying the entire cost from your savings.

Depending on your circumstances, you could:

Pay for the system outright
Use a personal or green home improvement loan
Spread the cost through a solar panel finance agreement
Use business or asset finance for a commercial installation
Take advantage of available grants or local funding
Reduce the effective cost through 0% VAT and Smart Export Guarantee payments

Before choosing an option, it’s important to look beyond the monthly payment. The interest rate, total amount repayable, expected energy savings, system lifespan and ownership terms can all affect the overall value of your investment.

strawberry fields solar panels installation

Pay for solar panels upfront

If you have sufficient savings available, paying for solar panels outright is often the simplest financing route.

You own the system immediately; there are no loan interest charges, and the electricity bill savings and export payments can contribute directly towards your return on investment.

The downside is the initial capital requirement. Using a significant portion of your savings may also mean having less money available for other investments, property improvements or unexpected expenses.

For landlords and property developers, this decision can be slightly different. You may want to compare the expected return from solar against other uses for your available capital.

Use a green loan or home improvement loan

A green loan can allow homeowners to spread the cost of solar installation over several years rather than paying the full amount upfront.

Some lenders offer loans specifically for energy-efficiency improvements, while others provide general home improvement loans that can be used for solar PV.

When comparing solar panel loans UK options, don’t focus solely on the monthly repayment. Check:

The APR and interest rate
The total amount repayable
The loan term
Any arrangement or early repayment fees
Whether the loan is secured or unsecured
Whether your expected solar savings comfortably cover repayments

A longer loan term may reduce monthly payments but increase the total interest paid.

Solar panel finance and payment plans

Some solar installers and finance providers offer structured payment plans that allow customers to spread the cost of installation.

This can make solar more accessible if you don’t want to use your savings but also don’t want to take out a standard personal loan.

However, always compare the total cost of solar financing, rather than choosing an option simply because the monthly payment looks affordable.

For example, a lower monthly payment over a longer period could ultimately cost more than a shorter finance agreement.

Ask for a clear breakdown of the installation price, deposit, interest, monthly payments, finance term and total amount payable before committing.

Grants and government support

A grant isn’t technically a financing product, but it can significantly reduce the amount you need to fund yourself.

There isn’t a universal UK-wide grant that pays for solar panels for every household. However, certain households may qualify for targeted funding.

In England, the Warm Homes: Local Grant can support eligible low-income households living in privately owned properties with an EPC rating between D and G. Solar panels are among the improvements that can potentially be funded through the scheme.

The scheme is delivered through participating local authorities, so availability and eligibility can depend on where you live.

If you’re a homeowner or landlord, it’s worth checking current government and local authority schemes before committing to a finance agreement.

Take advantage of 0% VAT

One of the simplest ways to reduce the upfront cost of domestic solar is the UK’s 0% VAT rate for qualifying energy-saving installations.

This isn’t a grant or loan, so there is no application process. Instead, eligible installations can benefit from the zero rate when the relevant conditions are met.

For anyone comparing solar installation quotes, make sure you understand whether VAT has already been accounted for in the price you’re being offered.

Even a relatively small reduction in the initial installation cost can improve the overall economics of your solar investment.

Earn money through the Smart Export Guarantee

Solar panels can potentially provide financial benefits beyond reducing your electricity bill.

If your solar PV system generates more electricity than your property uses at a particular time, the surplus can be exported to the grid. Under the Smart Export Guarantee (SEG), participating energy suppliers pay eligible small-scale generators for electricity they export.

The important point is that SEG is not a grant. Instead, it can provide an ongoing income stream after your solar system has been installed.

Suppliers set their own SEG tariffs, so it’s sensible to compare available rates and terms rather than automatically choosing the first option.

Commercial solar finance for businesses and developers

For businesses, landlords and property developers, the best approach can be different from residential solar financing.

Commercial solar installations can be funded through:

Business loans
Asset finance
Equipment leasing
Commercial mortgages or property finance
Power Purchase Agreements (PPAs)
Cash investment

For a business, the decision should consider more than the initial installation cost. Electricity consumption, operating hours, available roof space and plans for the property can all influence the potential return.

For example, a commercial property that uses a large amount of electricity during daylight hours may be particularly well suited to solar because more of the generated electricity can be consumed on-site.

For landlords, it’s also worth considering how solar could contribute to the property’s energy efficiency, tenant appeal and long-term running costs.

What should you consider before financing solar panels?

Before choosing a solar panel financing option, get a realistic understanding of what your system could deliver.

Consider:

Your property’s solar potential

Roof orientation, shading, available roof area and location can all affect generation.

Your electricity usage

The more solar electricity you can use yourself, the more valuable your system can potentially be.

Installation cost

Get a detailed quotation covering panels, inverter, mounting system, installation and any additional work required.

Expected savings

Your projected electricity bill savings should be based on realistic generation and consumption assumptions rather than optimistic estimates.

Finance costs

Calculate the total amount you’ll repay, including interest and any applicable fees.

Battery storage

A battery may allow you to store surplus solar electricity and use it later, potentially increasing self-consumption. However, it also adds to the upfront cost, so it should be assessed as part of the wider financial calculation.

Is solar panel financing worth it?

For many property owners, financing can make solar more accessible by replacing a large upfront expense with manageable payments.

However, the numbers need to make sense for your particular property.

A good solar investment isn’t simply about finding the cheapest panels or lowest monthly finance payment. It’s about choosing a correctly sized system, understanding your expected energy savings and selecting a payment method that fits your financial position.

In other words, don’t ask only, “How much will my solar panels cost?” Ask, “What will my solar panels cost me after savings, export payments and finance charges?”

Find the right solar solution for your property

Whether you’re a homeowner looking to reduce energy bills, a landlord improving a rental property or a developer planning a more energy-efficient building, the right solar system starts with understanding your property’s requirements.

At Low Energy Services, we install solar panels across Scotland, England and Wales and can help you assess your property’s solar potential and installation requirements.

Ready to explore your options? Get in touch with Low Energy Services for a solar assessment and find out what solar could look like for your property.